manual gse 250

GSE Model 250 Digital Indicator Series

Technical Reference Manual

Issue AC

GSE Model 250/250X Technical Manual Copyright © 2008 GSE. All rights reserved. Published by: GSE 1525 Fairlane Circle Allen Park, MI 48101 USA Information in this Technical Reference Manual is subject to change without notice due to correction or enhancement. The information described in this manual is solely the property of GSE. This manual may not be distributed without written permission of GSE. GSE Locations GSE 1525 Fairlane Circle Allen Park, MI 48101 U.S.A. www.gse-inc.com GSE Amprobe Europe GmbH Phone: +49 (0) 2161-59906-11 Fax: +49 (0) 2161-59906-20

Version 2.4

Table of Contents

Chapter 1: Introduction _________________________________________________ 9 Manual Set _______________________________________________________________________ 10

Document Conventions _____________________________________________________________ 10

Specifications _____________________________________________________________________ 11

Chapter 2: Installation _________________________________________________ 13 General Warnings __________________________________________________________________ 13

Electrical Safety ___________________________________________________________________ 13

Cleaning _________________________________________________________________________ 13

Panel Mount Template ______________________________________________________________ 13

Cable Connections _________________________________________________________________ 14

DC Power (DC PWR + DC PWR -) _____________________________________________________ 14

Load Cell Connection ______________________________________________________________ 15 Load Cell Signals ________________________________________________________________ 15 4 – Wire Connection _____________________________________________________________ 15 6 – Wire Connection _____________________________________________________________ 15

Communication Port Connection _____________________________________________________ 16 RS-232 Serial ___________________________________________________________________ 16 Printer Connection _______________________________________________________________ 17 Remote Key ____________________________________________________________________ 17 Remote Display _________________________________________________________________ 17

Setpoint Output Connection _________________________________________________________ 18 Model 250 _____________________________________________________________________ 18 Model 250X ____________________________________________________________________ 18

GSE-Link Option Connection (Opto-Link) ______________________________________________ 19

Connecting Shields ________________________________________________________________ 20

Chapter 3: Configuration _______________________________________________ 21 Basic Operation ___________________________________________________________________ 21

Display ________________________________________________________________________ 21 Status annunciators ______________________________________________________________ 22 Setup Mode Annunciators _________________________________________________________ 22 Selections and Options ____________________________________________________________ 23 Numeric Entry __________________________________________________________________ 23 Keypad ________________________________________________________________________ 23

Update Model 250 Firmware _________________________________________________________ 26

Chapter 4: Setup ______________________________________________________ 27 Accessing the Setup Mode __________________________________________________________ 27

Full Setup ______________________________________________________________________ 27 Safe Setup _____________________________________________________________________ 27 Setup Display Prompts ____________________________________________________________ 28 Setup Lock Out _________________________________________________________________ 28

Exit the Setup Mode ________________________________________________________________ 28

250 Technical Reference

Groups and Items __________________________________________________________________ 29 GRP (Group) ___________________________________________________________________ 29 ITM (Item) _____________________________________________________________________ 29

Setup Parameters __________________________________________________________________ 29 Build _________________________________________________________________________ 29 Option ________________________________________________________________________ 30 Cal ___________________________________________________________________________ 31 Spec __________________________________________________________________________ 32 Serial _________________________________________________________________________ 34 Set.Pts or CheckW _______________________________________________________________ 35 Clock _________________________________________________________________________ 36 Test __________________________________________________________________________ 36 Factory ________________________________________________________________________ 37 End ___________________________________________________________________________ 37

Special Functions __________________________________________________________________ 37 None __________________________________________________________________________ 37 Test __________________________________________________________________________ 37 Count _________________________________________________________________________ 37 Units __________________________________________________________________________ 38 Hold __________________________________________________________________________ 38 Peak Hold ______________________________________________________________________ 38 Live Weight Averaging ___________________________________________________________ 38 Show Total (Accumulation) ________________________________________________________ 39

Chapter 5: Calibration _________________________________________________ 41 Calibration with Test Weights ________________________________________________________ 41

Zero __________________________________________________________________________ 42 Span __________________________________________________________________________ 42

Calibration with mV/V Entry _________________________________________________________ 42 DIR.ZER (Direct Zero Calibration Entry) _____________________________________________ 42 DIR.SPN (Direct Span Calibration Entry) _____________________________________________ 43

Using Linearization ________________________________________________________________ 43 ED.LIN (Edit Linearization Points) __________________________________________________ 43 CLR.LIN (Clear Linearization) _____________________________________________________ 44

Reset Calibration __________________________________________________________________ 44

Chapter 6: Approvals __________________________________________________ 45 Regular and Legal for Trade Modes ___________________________________________________ 45

NTEP Requirements ________________________________________________________________ 45

OIML Requirements ________________________________________________________________ 46

Audit Trail ________________________________________________________________________ 46

Physical Seal _____________________________________________________________________ 46

Chapter 7: Setpoints ___________________________________________________ 49 Setpoint Connection _______________________________________________________________ 49

Setpoint Operation (250 and 250SS) __________________________________________________ 49

Checkweigh Operation (250X) ________________________________________________________ 49

Chapter 8: Communications _____________________________________________ 50 Automatic Weight Output ___________________________________________________________ 51

Auto Weight Format String ________________________________________________________ 51

Printing __________________________________________________________________________ 52

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Master Serial Output _______________________________________________________________ 53

Advanced Communication __________________________________________________________ 53 Using GSE View Software ________________________________________________________ 53 Protocol Summary _______________________________________________________________ 54 Example: Reading a Weight or Setpoint Value ________________________________________ 55 Example: Remote Keypress _______________________________________________________ 57 Example: Reading a Value in Hexadecimal ___________________________________________ 58 Example: Setting a Value _________________________________________________________ 61 Error Codes (Registers) ___________________________________________________________ 62

Chapter 9: Troubleshooting _____________________________________________ 63 Error Messages _________________________________________________________________ 63 Weighing Errors _________________________________________________________________ 63 Setup and Calibration Errors _______________________________________________________ 63 Diagnostic Errors ________________________________________________________________ 64

Appendix _____________________________________________________________ 65 Dimensional Drawings ______________________________________________________________ 65

Setup Menu Quick Reference ________________________________________________________ 69 Index _________________________________________________________________________ 71


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Version 2.4

Chapter 1: Introduction The Model 250 series of indicators use the latest Sigma-Delta A/D technology to ensure fast and accurate weight readings.

The setup and calibration of the Model 250 are stored digitally within non-volatile memory.

All versions of the 250 provide a method of easily connecting an RS-232 cable for temporary communication for software upgrades or link to the GSE View software. Refer to page 53 for more information.

Standard Model 250 The ABS plastic version of the Model 250 is available in wall/desktop and can be panel mounted. It may be operated from either 4 AA batteries or a DC power source from 12V to 24V.

Figure 1: Model 250 Indicator

Model 250SS Panel Mount The Model 250SS Panel Mount has a stainless steel face with a membrane keypad overlay. The parameter map is the same as the Model 250.

The panel mount version may be operated from either 4 AA batteries or a DC power source from 12V to 24V.

Figure 2: Model 250SS Indicator


Model 250X The Model 250X enclosure is rated as IP69K for severe washdown applications. The Model 250X may be operated from 9.6V, 12V or 24V batteries or a DC power source from 12V to 24V. This version of the Model 250 is only available in wall/desktop.

Figure 3: Model 250X Indicator

MMAANNUUAALL SSEETT • Technical Reference Manual - Contains detailed information on calibration and setup. This

manual is intended for use by Scale Technicians who are installing the indicator.

• Operator Manual – Used for day to day operation of the indicator.

• Quick Start Manual - Intended for Scale Technicians who are familiar with the indicator and simply need a quick reference for menu options and connection diagrams, etc.

DDOOCCUUMMEENNTT CCOONNVVEENNTTIIOONNSS The following document conventions (typographical) are used throughout this reference manual.

Bold Text Bold text denotes words and phrases to note.

[KEY] A keypress while in the WEIGH MODE

<Key> A keypress while in the SETUP MODE. These keypresses are designated by the display annunciators Note: In the Specifications section the < symbol means less than and the > symbol means greater than.

^ This symbol denotes one space (used in Automatic Weight Output on page 51)

⊗ Items marked with ⊗ indicate that the setting is available only in Full Setup and is trade critical. When trade critical settings are changed the calibration counter will be incremented.

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SSPPEECCIIFFIICCAATTIIOONNSS

250 250SS Panel Mount

250X

Performance Resolution Up to 30,000 divisions, minimum of 0.25 V/division, 20 updates/second Zero Cancellation +/- 2.0 mV/V Span Adjustment 0.1 mV/V to 3.0 mV/V full scale Stability / Drift Zero: < 0.1μ V/°C (+ 8ppm of deadload max)

Excitation 5 volts for up to 4 x 350 or 8 x 700 ohm load cells (4 or 6 wire plus shield). Maximum load cell resistance is 1000 ohms

A/D Type 24 bit Sigma Delta with +/- 8,388,608 internal counts A/D Conversion Rate 20Hz with FIR filtering > 80db

Operation Environment

Temperature: 14 to 122°F ambient Humidity: <92% non-condensing Storage: -4 to 122°F ambient IP55 when panel mounted

Temperature: 14 to 122°F ambient Humidity: <90% non-condensing Storage: -4 to 122°F ambient IP65

Temperature: 14 to 122°F ambient Humidity: 100% Storage: -4 to 122°F ambient IP69K

Setup and Calibration Full digital with visual prompting Digital Filter 0.1 to 4.0 seconds Zero Range Adjustable from 2% to 20% of full capacity

Electrical AC Wall transformer: 110/240

VAC to 12 VDC @ 0.5mA Wall transformer: 110/240 VAC to 12 VDC @ 0.5mA 100 – 240 VAC 50/60 MHz

DC

12 to 24 VDC (2.5 VA max) 4 x AA batteries (Alkaline or rechargeable NiMH, NiCad)

12 to 24 VDC (2.5 VA max) 4 x AA batteries (Alkaline or rechargeable NiMH, NiCad)

12 VDC rechargeable NiMH (optional) battery pack.

Enclosure

Material ABS, Silicon Rubber, Nylon, Acrylic (no halogen used)

Stainless Steel face plate

Food grade plastic with stainless steel mounting bracket

Mounting Desk, panel, wall or column panel Desk, wall, column

Dimensions (Refer to page 65)

Desk: 6.5” (164mm) x 3.8” (97 mm) x 3.2” (81mm) Panel: 6.5” (164mm) x 3.0” (77 mm) x 1.16” (29.5 mm)

7.8” (199mm) x 4.4” (112 mm) x 1.8” (44.5 mm)

9.8” (249.mm) x 6.4” (163 mm) x 4.7” (119mm)

Features Display LED backlit LCD with six 0.8” digits with 8 annunciators including units Keypad 6 key silicon rubber 6 key membrane 6-key capacitive GSE Link Infra-red connector for optional GSE-Link PC cable (to RS-232 PC port) RS-232 Communication

RS-232 automatic transmit, network or printer outputs. Transmission rate: 2400, 4800, or 9600 baud

Setpoints 2 isolated transistor drive outputs (300mA total at 50VDC)

2 isolated transistor drive outputs (300mA total at 50VDC)

3 isolated high side drive outputs (400mA each at 12 – 24 VDC)

Function Key Unit switching, counting, manual hold, peak hold, live weight and accumulation Battery Backed Time/Date Battery life 10 years minimum

Linearization Five point linearity correction 10 point linearity correction Approvals FCC, CE, NTEP FCC, CE, NTEP CE, NTEP Shipping Weight 1.0 lb 5.0 lb 4.4 lb

Version 2.4

Chapter 2: Installation The following steps are required to set up the indicator. • Inspect indicator to ensure it is in good condition. • Use connection diagrams to wire up load cell, power and auxiliary cables as required. • Use the template provided for hole locations. • Connect power to indicator and press [ON/OFF] key to turn the Model 250 ON. • Refer to the Setup Parameter section on page 29 for information on configuring and calibrating the

Model 250. • To turn the Model 250 OFF press and hold [ON/OFF] key for three seconds (until display blanks).

GGEENNEERRAALL WWAARRNNIINNGGSS • Do not subject the Model 250 indicator to shock, excessive vibration or extremes of temperature

(before or after installation). • Inputs are protected against electrical interference, but excessive levels of electro-magnetic radiation

and RFI may affect the accuracy and stability. • The indicator should be installed away from any sources of excessive electrical noise. • The load cell cable is particularly sensitive to electrical noise and should be located well away from

any power or switching circuits. • For full EMC or for RFI immunity, termination of cable shields and correct grounding of the indicator

is essential.

EELLEECCTTRRIICCAALL SSAAFFEETTYY • For your protection all electrical hardware must be rated for environmental conditions of use. • Make sure all AC powered equipment is installed near an easily accessible power socket outlet. • To avoid the possibility of electric shock or damage to the Model 250, always switch OFF or isolate

the indicator from the power supply before maintenance is carried out.

CCLLEEAANNIINNGG To clean and maintain the Model 250, never use harsh abrasive cleaners or solvents. Wipe the indicator with a soft cloth slightly dampened with warm soapy water. For the stainless steel models, use a cleaner specifically for stainless steel.

PPAANNEELL MMOOUUNNTT TTEEMMPPLLAATTEE Use the panel mount template (included with the Model 250 and Model 250SS) for drill hole locations. The template indicates positions for the two 4mm mounting screws through the panel. Also displayed on the template is the position of the rectangular hole that should be cut to allow for the connection of cables. The drilling template supplied with the indicator allows for front or rear machining of the panel.


CCAABBLLEE CCOONNNNEECCTTIIOONNSS All cable connections are made to the rear of the Model 250 using screwless terminals. The Model 250SS and 250X indicators will need to have the rear cover removed to access the connection terminals. The Model 250SS uses screwless terminals where the Model 250X uses screw in terminal connectors.

Wires must be stripped of insulation by at least 3/8” (10mm). It is not necessary to tin the ends of the wire with solder or to add crimp ferrules to the wires. However, these techniques are also compatible with the terminals and may ultimately make for a neater job.

To install wires in the Model 250 and Model 250SS, depress the lever located beside the terminal required and push wire into the hole. Release the lever and pull gently on the wire to ensure it is secure in the terminal. Refer to the corresponding drawing below.

To install wires in the Model 250X, remove the load cell connector and loosen the screws. Insert the wires in the designated position of the connector and tighten the screws. Gently pull on the wire to ensure it is secure in the connector. Refer to the corresponding drawing below.

NOTE: For wash down and severe wash down environments, be sure to avoid splicing communication cables, load cell cables or home run cables. Splicing cables may cause water wicking of the cable and jeopardize the integrity of stainless steel and IP69K enclosures. Make sure all cables are sealed on both ends to prevent water damage.

250/250SS Load Cell Connection 250X Load Cell Connection

DDCC PPOOWWEERR ((DDCC PPWWRR ++ DDCC PPWWRR --)) The DC supply need not be regulated, provided that it is free of excessive electrical noise and sudden transients. The Model 250 series indicators can be operated from a high quality AC wall transformer as long as there is sufficient capacity to drive both it and the load cells.

The Model 250X offers two DC power variations. A 12 VDC rechargeable NiCad battery for portable severe wash-down applications or supply your own DC power from a car/truck battery. The battery pack option uses an external charger.

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LLOOAADD CCEELLLL CCOONNNNEECCTTIIOONN

LOAD CELL SIGNALS Very low output scale bases may be used but may induce some instability in the weight readings when used with higher resolutions. Generally speaking, the higher the output, or the lower the number of divisions, the greater the display stability and accuracy.

The indicator can display the milliVolt-per-Volt reading that can be used to check scale base signal output levels. For more information, refer to SCALE (Scale Base Test Display) page 36.

The Model 250 will accept either 4-wire or 6-wire load cell cable connection. To correspond with the actual cabling installation the indicator must be configured in setup to the correct setting. For more information, refer to CABLE (4-Wire or 6-Wire) page 30.

4 – WIRE CONNECTION The minimum connectivity requirements are the connection of four wires (i.e. Excitation + and - along with Signal + and -). Internally the indicator has a precision analog switch that can be used to connect the Sense + and - lines directly to the Excitation + and - lines.

Any addition to the load cell manufacturer's cable length using 4-wire connection, is only recommended for short cable runs. Where long additions to cable lengths are needed, a 6 wire extension is required.

The BUILD:CABLE parameter must be set to 4 to allow for 4-wire connection. Refer to CABLE (4-Wire or 6-Wire) page 30.

6 – WIRE CONNECTION The excitation and signal lines are connected the same as for a 4-wire installation. The extra two wires should be connected to the Sense + and Sense – terminals.

The BUILD:CABLE parameter must be set to 6 (the default) to allow for 6-wire connection. Refer to CABLE (4-Wire or 6-Wire) page 30.

6-Wire Load Cell Connection (250/250SS)

6-Wire Load Cell Connection (250X)

4-Wire Load Cell Connection (250/250SS) 4-Wire Load Cell Connection (250X)


CCOOMMMMUUNNIICCAATTIIOONN PPOORRTT CCOONNNNEECCTTIIOONN This section provides diagrams to illustrate the terminal connections.

RS-232 SERIAL Connection between the indicator and computer DB9 or DB25 serial port (RXD, TXD, GND)

DB25 RS-232 - Indicator to PC (250/250SS)

DB25 RS-232 - Indicator to PC (250X)

DB9 RS-232 - Indicator to PC (250/250SS)

DB9 RS-232 - Indicator to PC (250X)

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PRINTER CONNECTION Connection between the indicator and printer DB25 serial port (RXD/TXD, GND and DTR))

REMOTE KEY The indicator requires a voltage free contact between TXD and RXD to enable the remote key input and the SPEC:REM.FN parameter must be set. Refer to page 34 for configuration details.

NOTE: The remote input will not function when in setup or when using the Opto-Link.

REMOTE DISPLAY The remote display documentation should be referred to for connection details. Connect TXD to RXD and GND to GND on the remote display.

Remote Display Connection

WARNING Do not connect voltage to the remote key input switch or connection terminals. Connection of any active circuitry may damage the indicator.

Remote Key Input Connection (250/250SS)

Remote Key Input Connection (250X)

DB25 RS-232 - Indicator to Printer

(250/250SS) DB25 RS-232 - Indicator to Printer

(250/250SS)


SSEETTPPOOIINNTT OOUUTTPPUUTT CCOONNNNEECCTTIIOONN

MODEL 250 AND 250SS The output drivers for the Model 250 are isolated open emitter transistor drives that are capable of driving up to a total of 300mA. This configuration allows for the direct connection of the indicator outputs to most PLC types.

The voltage applied to the COM terminal appears on the output lines (i.e. OUT1 and OUT2) when the outputs are active (e.g. to connect to a PLC connect +24V to the common terminal). The outputs can then be connected directly to PLC inputs so when activated the PLC will see the 22V signal (approx. - the exact switch loss will depend on loading of the output).

To drive external loads (e.g. relays), connect the relay coil positive supply to the output common and the output line directly to one side of the relay coil. Connect the other end of the relay coil to the negative supply. It is recommended that fly-back diodes or transient suppressors be fitted across relay coils to limit switching noise.

MODEL 250X The output drivers for the instrument are high side drive and are capable of driving up to 400mA each. This configuration allows for the direct connection of the instrument outputs to most types of PLC.

The voltage applied to the instrument’s positive power supply terminal (+) appears on the output lines (Over, Pass and Under) when the outputs are active. The outputs can then be connected directly to PLC inputs.

To drive external loads (eg. relays), connect the output line directly to the positive side of the relay coil. Connect the negative side of the relay coil to COMMON. It is recommended that fly-back diodes or transient suppressors be fitted across inductive loads such as relay coils to limit switching noise.

Output to Relay (250X)

Output to PLC (250X)

Output to Relay (250/250SS)

Output to PLC (250/250SS)

Version 2.4

GGSSEE--LLIINNKK OOPPTTIIOONN CCOONNNNEECCTTIIOONN ((OOPPTTOO--LLIINNKK)) A temporary infrared communication link can be established between the Model 250 and a computer using the GSE-LINK cable option. The GSE-LINK cable can be used to transfer setup and calibration information from a computer. It can also be used to download software upgrades to the Model 250 from a PC.

The computer end of the GSE-LINK cable is a standard female DB9 connector. The indicator end of the cable consists of an infrared transceiver, which attaches to the left side of the Model 250 display. To facilitate a quick and simple connection, the infrared transceiver is secured in place by a permanent magnet located within the head of the GSE-LINK.

Refer to GSE-LINK Activation on page 25 for more information.

Figure 4: GSE Link Option Attachment

WARNING The GSE-LINK head contains a strong magnet and care should be taken with it's proximity to electronic media (e.g. credit cards, floppy disks, etc.) and/or other electronic instrumentation.


CCOONNNNEECCTTIINNGG SSHHIIEELLDDSS

To obtain full EMC or for RFI immunity, cable shields MUST be connected to the ground lug on the rear of the indicator.

Figure 5 illustrates an example of possible connections. Also shown are the connecting cables restrained using cable ties fastened around the cable strain relief anchors.

Figure 5: Cable Shield Connection

Care should be taken when connecting shields to maximize EMC or RFI immunity and minimize ground loops and cross-talk (interference) between indicators.

For full EMC or for RFI immunity, termination of the cable shields at the ground (earth) lug is very important. The ground lug of the indicator must be separately connected to ground potential via a reliable link.

The Model 250 should only be connected to ground via a single reliable link to avoid ground loops.

Where each indicator is separately grounded, interconnecting cable shields should be connected at one end only.

Version 2.4

Chapter 3: Configuration

BBAASSIICC OOPPEERRAATTIIOONN The Model 250 provides a bright backlit LCD display and simplified menu system for easy setup and use.

Figure 6: Display and Functions

DISPLAY The display is a six-digit LCD display. Figure 6 shows the main elements of the front panel and display.

The Model 250 has various main display sections for the visual output of weight information. Each display section is described below.

Weight Display The weight display indicates the weight readings, setup information, errors and warnings.

Units Display The units display shows the units of the weight reading as either grams (g), kilograms (kg), pounds (lb), tons (t), none ( ) or ounces (o) (250X only). If the Model 250 is set up for counting, the units display will show pieces (p).


STATUS ANNUNCIATORS Refer to the following table for details. Table 1: Status Annunciators

When in Setup Mode the editing annunciators are shown to identify the function of the front panel keys (i.e. GRP, ITM, SEL, EDT and OK). For more information refer to Setup Mode Annunciators discussed below.

SETUP MODE ANNUNCIATORS When in Setup Mode, the Model 250 displays editing annunciators. Figure 7 identifies each of the editing annunciators. While in the Setup Mode, press the corresponding key below the annunciator.

Figure 7: Editing Annunciators (Setup Mode)

Symbol Name Description

ZERO Visible when the gross reading is within ± ¼ of a division of true zero.

NET Visible when the displayed reading represents NET weight.

MOTION Visible when the displayed reading is not stable.

or OVER Visible when the setpoint weight is over the setpoint target. Red annunciator

or UNDER Visible when the setpoint weight is under the setpoint target. Yellow annunciator

or

PASS Visible when the setpoint weight is in between the high and low limits. Green annunciator

ZERO BAND

Visible when the displayed weight is within the zero 'dead' band setting. (The zero band symbol shows near the top right corner of the display.)

HOLD Visible when the displayed reading is held.

LOW BATTERY

Visible when battery voltage is too low and batteries need replacing or recharging. (The low battery symbol shows in the top right corner of the display.)

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Annunciator Key Description GRP ZERO Steps through the list of Groups. ITM TARE Steps through the list of Items.

Press this key to accept changes and return to the menus. (Also refer to the OK description below.)

SEL GROSS/NET Moves the editing cursor in some editing modes. EDT PRINT Steps through the available options when editing a particular item.

OK f (FUNCTION) Press this key to accept changes and return to the menus. (Also refer to the ITM description above.)

SELECTIONS AND OPTIONS A selection entry requires the choice of a single option from a list. When a Group and Item have been chosen, the <SEL> key is used to display the current setting for that item. The <EDT> key can be used to cycle through the options for that item. When the desired option is displayed the <OK> key can be pressed to accept the displayed option and re-display the item name.

NUMERIC ENTRY A numeric entry box allows the input of a number. When entering a number, the display will show digits with the currently selected digit flashing. The <SEL> key is pressed to select a digit to change. When the digit is selected the <EDT> key is pressed to change the digit from 0 through 9. The left most digit can also be changed to a dash (-) to enter a negative number. The <OK> key is pressed to accept the number that has been entered and return to the menu item.

Upper and lower limits are placed on some entries and an entry outside this range will cause the indicator to display dashes (i.e. - - - - - -).

Example: Setting Scale Capacity Press [ZERO] (<GRP>) repeatedly to display the BUILD group. Press [TARE] (<ITM>) repeatedly to display the CAP item. Press [GROSS/NET] (<SEL>) to select CAP and display the current setting (e.g. 0000.00lb). The currently chosen digit will be flashing. Press [GROSS/NET] (<SEL>) to advance to the next digit. When the digit to edit is flashing, press [PRINT] (<EDT>) repeatedly to cycle from 0 through 9. When the new digit to be set is flashing either press <SEL> to move to the next digit to edit and repeat the previous step; or press [ f ]<OK> or [TARE] <ITM> to accept all of the displayed digits (including the flashing digit) and re-display the menu item name.

KEYPAD All Models of the 250 utilize the same six keys in the same configuration. The material used for each model keypad is different however. Each key performs a different function in the weigh mode and setup mode. Refer to this section for a list of the keys and their function.

The standard Model 250 and panel mount have six silicon rubber keys. The Model 250SS comes with a six key membrane keypad. The Model 250X offers a capacitive keypad with large easy to use keys. The Model 250X keypad has been calibrated to work with human fingers. NOTE: Do not use blunt objects to press the keys. This will cause damage to the keypad.

Key Weigh Mode Function POWER Cycle power ZERO Performs a gross zero function TARE Performs an auto-tare function GROSS/NET Switches between gross and net modes PRINT Performs a print function f User defined function key. See page 25 for details


Primary Function (Weigh Mode) A single press of each key triggers the weighing operation printed on it. The Model 250 allows individual keys to be disabled in the setup mode. All keys are enabled at the factory, but some keys may have been intentionally disabled (locked) during installation. If a key has been locked, a long beep sounds when it is pressed. If however, the key beeps normally, but does not appear operate, it is possible the indicator is waiting for a stable condition.

Stability Considerations Once the [ZERO], [TARE] or [PRINT] key is pressed the Model 250 waits for a stable valid reading before performing the associated operation. If the weight readings remain unstable or invalid due to a diagnostic error for longer than 10 seconds, the operation is cancelled and the STABLE ERROR message is displayed.

To improve the stability of the weight reading, increase the filtering or decrease the motion detection value. Refer to FILTER (Reading Average) and MOTION (Motion Detection) on page 30 for more information.

POWER Key The [POWER] key is used to turn the Model 250 on and off. To initially turn the indicator on, press and hold the [POWER] key. The display will show the following:

Display segments will light and then clear. Software Version (i.e. V1.0). Calibration Counter (i.e. C.00010).

The current weight will then display.

To turn the indicator off, press and hold the [POWER] key for three seconds. The Model 250 will turn OFF followed by the three-second countdown.

When using batteries the backlight will automatically turn off to conserve battery power after a short period of inactivity. A short press of the [POWER] key will turn the backlight on again. Refer to B.LIGHT (Backlight Operation) page 33 for more information.

Note: The [POWER] key can be locked to prevent the indicator from being turned off through the front keypad. Refer to KEY.LOC (Front Panel Key Locking) page 33 for more information.

ZERO Key When an empty scale has drifted away from a true zero reading, this key is used to perform a zero adjustment on the scale display. The zero adjustment is stored when power is removed and is re-used when next powered up.

The amount of weight that may be cancelled by the [ZERO] key is limited to the setting at parameter Z.RANGE (Allowable Zero Operating Range). Refer to page 31 for more information.

When the indicator is set to Industrial mode a long press of the [ZERO] key will remove any stored zero adjustment. Refer to Chapter 6: Approvals on page 45 for more information on modes.

TARE Key This key is used to temporarily set the scale to zero (such as cancelling the weight of a carton before performing a filling operation). The display will show the Net weight and the NET annunciator will be lit.

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The weight tared is deducted from the allowable range of the scale, reducing the maximum weight that can be displayed.

The tare adjustment is stored when power is removed and is re-used when next powered up. The [TARE] key can operate in all modes (i.e. Industrial, OIML and NTEP). Refer to Chapter 6: Approvals on page 45 for more information on modes.

GROSS/NET Key This key toggles the weight display between the Gross weight and the Net weight if a Tare weight has previously been acquired using the [TARE] key.

GSE-LINK Activation This feature is used to temporarily connect a PC to the Model 250 for calibration and setup purposes.

A long press of the [GROSS/NET] key from the weigh mode will toggle the GSE-LINK infrared communications On/Off.

When the GSE-LINK has been enabled the following will occur:

• The indicator briefly displays the prompt opto-L.

• The editing annunciators (i.e. GRP, ITM, etc.) will flash for up to five minutes while the indicator searches for activity. During this time period, the Model 250 also disables the RS-232 communications.

If the indicator is successful in locating activity, the editing annunciators will continue to flash during the entire period of communications.

If the indicator fails to locate activity, the GSE-LINK will be disabled and the editing annunciators will stop flashing. The Model 250 will also revert back to the normal RS-232 communications (i.e. the SERIAL:TYPE setting will be re-activated).

PRINT Key If a printer or computer has been attached to the Model 250 and the manual print function has been selected, the [PRINT] key will trigger an output of the current weight reading. The PRINT prompt is displayed while waiting for the printer to accept data. If the printer is

offline the PRINT prompt will remain for a maximum of 10 seconds before the operation is cancelled. Each weight printed is automatically added to an internal total weight.

A long press of the [PRINT] key will print the accumulated total. The total weight is then cleared automatically.

FUNCTION Key When leaving the factory, the [ f ] key has no function programmed. The primary function of this key can be selected from a number of different choices including peak-hold, counting, etc. Refer to page 37 for details of the available functions. Each primary

function has an associated overlay sticker that should be applied underneath the [ f ] key to label the function of the key.

A long press of the [ f ] key may be used for certain functions depending on the primary function of the key.


Lock 250X Keypad for Wash-Down Refer to the WD.LOC parameter on page 34 for details on setup and use.

UUPPDDAATTEE MMOODDEELL 225500 FFIIRRMMWWAARREE The Model 250 has flash memory on the main board. It is possible to update the firmware simply by using a computer. The firmware is loaded into a flash memory IC via the RS-232 port or GSE-Link. This allows for ease of loading firmware updates and product enhancements. Follow the instructions below to reflash the indicator:

1. Attach GSE Link or RS-232 cable to the indicator and to a PC. 2. Power up the indicator. 3. Double click on reflash file program (GSE icon) to start. If the GSE-link is being used go to step 4. Otherwise go to step 5. 4. Press and hold the [GROSS/NET] key for 3 seconds to connect. "opto-L" will flash on the indicator, and

the bottom of the indicator display will flash. 5. Click on the "Start" button on the reflash program. 6. Select PC comm. port or opto-link if used and click “OK”. 7. At "Connecting the Unit to PC" screen, click "Next". 8. On the PC, "programming flash" will be shown and also a progress status bar. The indicator will display

"Prog". 9. After the reflash is complete, the program will display, "Unit successfully programmed!" 10. Exit the program by clicking on the X to close the window.

Version 2.4

Chapter 4: Setup

AACCCCEESSSSIINNGG TTHHEE SSEETTUUPP MMOODDEE The Model 250 has two levels of access code protection to provide a security lock on accessing Setup via the keypad. For further details of menu items available in each setup mode, refer to the Setup Menu Quick Reference on page 69.

• Full Setup Access code • Safe Setup Access code

The Full Setup access code can also be used to access Safe Setup

FULL SETUP The Full Setup method provides access to all functions in Setup, including legal for trade and calibration sensitive settings. Changes in Full Setup mode may result in the calibration counter being incremented. Changes to access codes and restoring the factory default settings can only be accessed in Full Setup mode. These items will however not increment the calibration counter. If an attempt is made to enter Full Setup using the incorrect access code, the indicator will respond with the message “ENTRY DENIED”. Setting an access code for Full Setup restricts any access to Full Setup. Refer to FULL.PC (Full Security Access code for Digital Setup) page 33.

To access the Full Setup mode, first ensure the indicator is on.

• For the 250 and 250SS press and hold both the [POWER] and [f ] keys together for two seconds.

• For the 250X press and hold the [POWER] and [GROSS/NET] keys together for two seconds.

SAFE SETUP The Safe Setup method restricts access to the trade critical settings. Changes made in this mode will not increment the calibration or setup counter. If an attempt is made to enter Safe Setup mode using the incorrect access code, or if an attempt is made to alter a trade critical setting while in Safe Setup, the indicator will respond with the message “ENTRY DENIED”. Setting an access code for Safe Setup restricts access to Safe Setup functions. Refer to SAFE.PC (Safe Security Access code for Digital Setup) page 33.

To access Safe Setup, first ensure the indicator is on.

• For the 250 and 250SS press and hold both the [POWER] and [ZERO] keys together for two seconds.

• For the 250X press and hold the [POWER] and [TARE] keys together for two seconds.

WARNING All menus and items will be enabled in Full Setup. Care should be taken to avoid inadvertently altering the Build or Calibration settings.


SETUP DISPLAY PROMPTS When accessing Full or Safe Setup the indicator will beep twice and then display the following: FULL or SAFE (depending on setup access type) SETUP Software Version (i.e. V1.0). Calibration Counter (i.e. C.00010) and Setup Mode Counter (i.e. F.00002) if NTEP is enabled at OPTION:USE

If an access code has been configured, the “ENTER PASS” prompt will display and the setup access code must be entered to gain access. Refer to Accessing the Setup Mode on page 27, SAFE.PC (Safe Security Access code for Digital Setup) page 32 and FULL.PC (Full Security Access code for Digital Setup) page 33 for more information.

The title of the first Group (i.e. BUILD) will then be displayed.

SETUP LOCK OUT If an attempt is made to enter Full or Safe Setup using an incorrect access code, the indicator will respond with the message “ENTRY DENIED” and then the user will be returned to the weigh mode. An access code counter has been set so that only three failed attempts can be made to access Full/Safe Setup. On the fourth attempt the user will be 'locked out' of Full/Safe setup. Should this occur the “ENTER PASS” prompt will not display, but instead the “ENTRY DENIED” message displays and returns the user to the normal operating mode.

To reset the access code counter, turn off the indicator and turn it back on. The access code counter will be reset to zero (allowing the user to enter the correct access code).

EEXXIITT TTHHEE SSEETTUUPP MMOODDEE To save settings, exit setup, and return to the normal weighing mode use one of the following methods. The Model 250 and 250SS can use any of the three examples. The Model 250X only allows Method 3.

• Method 1: Press and hold both the [POWER] and [f ] keys together for two seconds.

• Method 2: Press and hold both the [POWER] and [ZERO] keys together for two seconds.

• Method 3: Press the [ZERO] (GRP) key until End is displayed and then press [TARE] (ITM).

The indicator will beep and then display the following:

SAVING Software Version (i.e. V1.0). Calibration Counter (i.e. C.00010) Setup Mode Counter (i.e. F.00003) if NTEP is enabled at OPTION:USE The current weight will then display.

Warning: If the power is interrupted while in setup (i.e. by disconnecting the power cable or pressing the [POWER] key), unsaved settings will be lost.

Version 2.4

GGRROOUUPPSS AANNDD IITTEEMMSS All keypad setup options in the Model 250 are organized in a tree structure made up of Groups and Items. To simplify this manual, Groups and Items will be notated as follows (GROUP:ITEM). Refer to Setup Menu Quick Reference page 69 for a list of all Groups and Items.

GRP (GROUP) Setup is divided into a series of Groups. Each group has a distinctive group title. All options in any one group have related functions. The <GRP> (ZERO) key can be used to cycle through the available groups.

ITM (ITEM) Each group is divided into individual Items. Each item represents a parameter that can be changed. Pressing the <ITM> (TARE) key will enter the displayed group, allowing access to the items within the group. The <ITM> (TARE) key can be used to cycle through the available items. The <SEL> (GROSS/NET) key is then used to edit the item.

SSEETTUUPP PPAARRAAMMEETTEERRSS The following sections describe the setup parameters of each of the Groups and Items in Setup.

BUILD Settings within this Group are used to configure the indicator to suit the current application. It is important to fully set the options within this group before calibration is attempted. Later changes to items within this group may invalidate the current calibration data.

DP (Decimal Point Position) Sets the location of the decimal point on the display. To avoid confusion, set this parameter first so that all other weight related values are displayed with the decimal point in the correct position.

Can be set from 000000 (none) to 0.00000 Default: 000000

CAP (Maximum Capacity) Sets the nominal maximum capacity (or full scale) of the scale. This is set in weighing units (e.g. lb, t, etc.), with the decimal point in place.

For example, if a scale is to weigh 500.0 lb in 0.5 lb increments, CAP is set to 500.0, DP is set to 00000.0 and RES is set to 5.

Range: 000100 to 999999 Default: 003000


RES (Count-by Resolution) Sets the resolution (Count-by) of the display. The resolution is the number by which the indicator will count.

Options are: 1, 2, 5, 10, 20, 50 or 100 Default: 1

UNITS (Weighed Units) Sets the units for display and printing. Options are: (g) grams, (kg) kilograms, (lb) pounds, (t) tons, (o) ounces (250X only), ( ) none (i.e. other units). Default: lb

HI.RES (High Resolution x 10 mode) Sets the indicator display weight at 10 times resolution. This is intended for test purposes but may be used for non-trade weighing. Options are: ON or OFF Default: OFF

CABLE (4-Wire or 6-Wire) Sets the load cell input to operate in 4-wire (auto sense) or 6-wire mode. Options are: 4 or 6 Default: 6

OPTION Items within this Group are used to configure the operating parameters of the scale.

USE (Scale Use) This is where the basic use of the scale is set (legal for trade). This setting configures the indicator for Industrial, OIML or NTEP operation. Refer to page 45 for more information.

Options are: INDUST (Industrial), OIML or NTEP Default: INDUST

FILTER (Reading Average) The Model 250 can average a number of consecutive readings when calculating the displayed weight. This is used to reduce unwanted weight fluctuations caused by vibrations or dynamic forces. High settings will stabilize the display at the expense of rapid response to sudden weight changes. Options are: NONE, 0.2, 0.5, 1.0, 2.0, 3.0, 4.0 (time in seconds) Default: 0.5 (seconds)

MOTION (Motion Detection) Sets how much weight variation over a defined time period is allowed before the displayed weight is considered to be unstable. This value is displayed as weight change (0.5 or 1.0 graduations) per second. When set to OFF, the Motion Detection is ignored and ZERO, TARE and PRINT actions are instantaneous. Options: OFF, 0.5-1.0, 1.0-1.0 (graduations per second)

Version 2.4

Default: 0.5-1.0 (0.5 graduations per second)

INIT.Z (Initial-Zero on Startup) This function can be used to automatically ZERO the indicator during power-up. The amount of weight that can be zeroed is limited to +/- 10% of full scale. Options are: ON or OFF Default: OFF

Z.TRAC (Zero Tracking Sensitivity) Zero tracking allows the display to adjust for minor changes in the zero balance of the scale. When enabled, the indicator will track weight readings within the zero 'dead' band back to precisely zero at a maximum rate of 0.5 (SLOW) or 10 (FAST) graduations per second. Options are: OFF, SLOW, FAST Default: OFF

Z.RANGE (Allowable Zero Operating Range) This setting restricts the range over which the Zero functions can operate. The ranges are in terms of percent. Options are: -2_ 2, -1_ 3, -20_20 Default: -2_ 2 (-2% to +2%)

Z.BAND (Zero 'Dead' Band) This is an adjustable margin either side of true zero that defines the zero 'dead' band. The zero 'dead' band is used by the automated functions to determine zero load.

For example: A Z.BAND setting of 4, DP setting of 00000.0 and RES of 5 will identify the readings between -4.5 and 4.5 as zero.

When the displayed weight reading is within this band the indicator displays the zero band annunciator. Refer to Status Annunciators page 22. Settable over the full weight range. Always enter a number in multiples of the displayed resolution. Refer to RES (Count-by Resolution) on page 30 for more information. Default: 0 (i.e. -0.5 to 0.5 graduations)

R.ENTRY (Program Button) This parameter enables or disables the use of the setup button located on the rear of the indicator. The setup button is used to restrict access to the full setup. The setup button is used for a legal for trade physical seal. Refer to “Physical Seal” page 46 for more details.

CAL Items within this group perform various calibration routines. For detailed scale calibration procedures refer to Chapter 5: Calibration on page 41. Certain items in the Scale Build can affect the calibration of the scale. Always check that these sections are correctly configured to suit the current application before attempting to calibrate the scale.

ZERO (Zero Calibration) Select to perform Zero Calibration. While the zeroing is in progress the display will show “Z.in P”. Refer to ZERO (Zero Calibration Routine) on page 42.


SPAN (Span Calibration) Select to perform Span Calibration. While the span calculation is in progress the display will show “S.in P”. Refer to SPAN (Span Calibration Routine) on page 42.

ED.LIN (Edit Linearization Points) Select to view linearization setup and start linearization routines. While linearization is in progress the display will show “L.in P”. Refer to ED.LIN (Edit Linearization Points) on page 43 for more information.

CLR.LIN (Clear Linearization Points) Select to view linearization setup and select linearization points to clear. Refer to CLR.LIN (Clear linearization) page 44 for more information.

DIR.ZER (Direct Zero Calibration) Select to enter the mV/V value of the zero calibration directly. This feature is used to enable approximate calibrations to be performed in situations where a standard ZERO calibration is impractical (e.g. calibration on a partially filled silo).

DIR.SPN (Direct Span Calibration) Select to enter the mV/V value of the full scale capacity of the scale build. This feature enables the Model 250 to be calibrated based on the rated output capacity of the load cells rather than using test weights. The accuracy of this method is limited to the accuracy of the published load cell ratings.

FAC.CAL (Restore Default Factory Calibration) Select this choice to restore default factory calibration. This restores all calibration critical settings in the BUILD, OPTION and CAL menus back to factory defaults. The indicator will prompt with Cont. N. Press <EDT> (PRINT) to change to Cont. Y and <OK> ( f ) to continue. If Cont. Y is chosen and then <OK> or <ITM> is pressed, the Model 250 will display “DONE” to indicate that the operation has been completed.

SPEC Settings within this group control features including access codes, key locking, key functions and display settings.

SAFE.PC (Safe Security Access code for Setup) The SAFE.PC (Safe Access code) allows partial access to the Setup mode (i.e. only non calibration/trade critical settings can be changed). For the Safe Access code to have any effect, the FULL.PC access code must also be set. The default access code setting is 000000 that allows free access. Any other number will enable the access code functions and restrict access. Refer to Accessing the Setup Mode on page 27 for more information.

Range 000000 to 999999 Default: 000000

Version 2.4

FULL.PC (Full Security Access Code for Setup) The FULL.PC (Full Access code) can be set to restrict access to Full Setup mode. This access code is used to prevent unauthorized or accidental tampering in the indicator setup. The default access code setting is 000000 that allows free access. Any other number will enable the access code functions and restrict access. Refer to Accessing the Setup Mode on page 27 for more information. Range 000000 to 999999 Default: 000000

KEY.LOC (Front Panel Key Locking) This item allows individual keys to be locked and unlocked. The display shows a dash (-) to indicate that a key is locked (inactive) or characters for each key that is active (e.g. the characters P12345 displayed). The letter P represents the [POWER] key and the numbers 1234 and 5 represent the remaining operation keys. The operation keys are numbered from the left with the [ZERO] key being number 1. Note: When the [POWER] key is locked, the indicator cannot be turned off from the front keypad. Default: P12345 - All keys are unlocked (active)

KEY.FN (Key Functions) The function of the [ f ] key can be selected here. Refer to Special Functions page 37 for details of the available key functions. Options are: NONE, COUNT, HOLD, LIVE.WT, TEST, UNITS, PEAK.H, SHOW.T Default: NONE

AUT.OFF (Auto Power Off / Battery Operation) The Model 250 can be set up to automatically power down after a period of no activity. Weight motion, network communications or any press of the keypad is enough to keep the indicator powered up. When operating on batteries the unit will turn off after 30 minutes of inactivity even if set to NEVER. Options are: NEVER: Never power off automatically (Battery: powers down after 30 minutes) 1, 5,10 (time in minutes) Default: NEVER

B.LIGHT (Backlight Operation) Sets the operation of the backlight. When operating the backlight with batteries the brightness is lowered automatically to conserve power and the backlight will automatically turn off after 10 seconds of inactivity. To turn on again, press the [POWER] key. Options are: OFF: Backlight is off ON: Backlight is always on Default: ON

WARNING Be sure to remember your password. Reflashing the unit will not clear out the password. The indicator will need to be sent back to the factory in order to regain access to the setup mode.


REM.FN (Remote Function) This item allows the indicator to be triggered from a remote input. The remote input can be set to have no function (e.g. NONE) or it can be set to mimic one of the front five panel key functions (i.e. where KEY1=ZERO, KEY2=TARE, KEY3=GROSS/NET, KEY4=PRINT and KEY5=FUNCTION). The remote input can also be set to BLANK where, when the remote input is pressed and held, the indicator displays dashes (i.e. - - - - - -) and the front five key functions are disabled. When the remote input is released the indicator display and front key functions return to normal. For the REM.FN to have any effect, the SERIAL:TYPE item must be set to KEY. Refer to TYPE (Serial Output Type) below for more information. Options are: NONE: No function. KEY1 to KEY 5: Mimic one of the front five function keys BLANK: Display dashes (i.e. - - - - - -) and disable front key functions. Default: NONE

BAT.VLT (Battery Voltage) The indicator can be set to run with a variety of different batteries. When in the default setting of PWR the indicator will always assume it has external power. In other battery modes the indicator will always assume it is on battery power. Correct function of the low battery warning is dependant on correct setting of the battery voltage.

Options are: PWR: Never powered off battery 4.8 (250 & 250SS only), 9.6 (250X only),12, 24 (Battery Voltage)

Default: PWR

WD.LOC (Washdown Front Panel Key Locking) (250X only) This feature locks the keypad during washdown. Enable this feature and save the change. Turn the Model 250X off. At power up the display will prompt “KEY LOCK” and prompt to UNLOCK PRESS KEY (1)POWER, (6)FUNCTION, (2)ZERO, (5)PRINT, (3)TARE, (4)GROSS/NET. “PASS” will be displayed if the code was entered successfully and the weigh mode will be accessed. If the wrong key is pressed or no key is pressed the unit will turn off.

SERIAL Settings within this Group determine the serial and printing outputs. Refer to Automatic Weight Output and Printing on page 51 for more information on serial configuration.

TYPE (Serial Output Type) Sets the function of the first serial output. The port can be disabled or set to run as an automatic output or a network device.

Options are: NET: Network Communications. AUTO.1: Enables 10 Hz automatic transmission using format 1. Refer to page 51. AUTO.2: Enables 10 Hz automatic transmission using format 2. Refer to page 51. PRINT: Enables printer driving. Refer to page 52. MASTER: Send contents of LCD display to a remote display. Refer to page 53. KEY: Enables the Remote Function setting (SPEC:REM.FN).

Default: NET

Version 2.4

BAUD (Serial Baud Rate) The baud rate determines the serial data transmission speed.

Options are: 2400, 4800, 9600 Default: 9600

BITS (Serial Format Options) The BITS parameter allows the data transmission bit pattern and interface to be changed. The display will show the current setting in the form n81- where each character has a meaning as shown below.

Options are: N or O or E: Parity bit: (N) None, (O) Odd, (E) Even 8, 7: Number of data bits 1, 2: Number of stop bits -, D: DTR handshake disabled or enabled Default: n81-. (For most applications the default setting is applicable.)

ADDRES (Indicator Address) Use this option to set the Model 250 address when operating with network communications.

Range 01 to 31 Default: 31

RST.CON (Reset Printed Consecutive Number) Use this option to reset the printed consecutive number back to 1. The indicator will prompt with Cont. N. Press <EDT> to change to Cont. Y and <OK> to continue. When Cont. Y has been chosen the unit will display “DONE” to indicate that the operation has been completed.

SET.PTS OR CHECKW Settings within this group configure the setpoint (250 & 250SS) or checkweighing (250X) system. Refer to Setpoints page 49 for a detailed explanation of setpoints.

SRC (Weight Source) The weight source determines the weight reading that is used for the setpoint comparisons.

Options are: GROSS: Use gross weight readings only. DISP: Use the displayed weight (gross or net). OFF: Both setpoints are off.

Default: OFF

TARG.HI or Over (Target for Overweight) This is the target for setpoint 1 (output 1). Weights above this target will cause the setpoint to become active and output 1 to be driven. The indicator displays the over annunciator. Refer to Status Annunciators page 22.

Range: -99999 to 999999 Default: 000000


TARG.LO or Under (Target for Underweight) This is the target for setpoint 2 (output 2). Weights below this target will cause the setpoint to become active and output 2 to be driven. The indicator displays the under annunciator. Refer to Status Annunciators page 22.

Range: -99999 to 999999 Default: 000000

CLOCK Items within this group set date and time related functions.

FORMAT (Date Format) This sets the date format. Options are: dd.mm.yy mm.dd.yy

Default: dd.mm.yy

YEAR (Set Year) Range: 2000 to 2099

MONTH (Set Month) Range: 01 to 12

DAY (Set Day) Range: 01 to 31

HOUR (Set Hour) Range: 00 to 23 (24-hour format)

MINUTE (Set Minute) Range: 00 to 59

TEST Items within this Group allow access to the testing routines for the Model 250. With these routines the scale base output can be monitored and the inputs and outputs can be tested.

SCALE (Scale Base Test Display) Verifies the correct load cell capacity and/or load cell wiring is used. It sets up the unit as a simple test meter to measure the load cell signal output. The display reads in milliVolts-per-Volt, factory calibrated to 0.1% worst case. When accessing this item, initially there should be no weight on the scale. In OIML or NTEP modes, this display is only active for five seconds before returning to the menu.

Version 2.4

FRC.OUT (Force Outputs) Forces each of the output drivers in turn on. All outputs turn OFF when leaving this step. The <EDT> key will advance through each output (e.g. ON.1 and ON.2). Pressing <OK> will turn all outputs off and exit the test.

FACTORY This is the factory adjustment menu.

DEFLT (Factory Default) This parameter restores all setup parameters with the exception of the calibration (CAL) and build (BUILD) menus back to the original factory settings. The main use of this routine is to completely reset an indicator which is being installed on a different scale.

The Model 250 will prompt with “Cont. N”. The default the indicator, press <EDT> to select “Cont. Y” and <OK> to continue. “DONE” will be displayed after the default is complete.

END The parameter can be used for exiting the setup mode. Refer to page 28 for details.

SSPPEECCIIAALL FFUUNNCCTTIIOONNSS The Model 250 has a special function key on the front panel. The function of this key can be configured to any of the key functions detailed below. Refer to KEY.FN (Key Functions) on page 33 for configuration details.

When leaving the factory, the [ f ] key has no primary function pre-programmed. Each primary function has an associated overlay sticker (supplied) that should be applied to the function key to label the function. Ensure the keypad is clean and dry before affixing the sticker. Refer to Cleaning page 13 for more information.

NONE When set to NONE the special function key is not used during normal operation. This is the default setting.

TEST The [TEST] key is used to test the functionality of the indicator’s display.

Press the [TEST] key to clear the display and show all segments of the display. The display will be cleared again before returning to the weigh mode.

COUNT The [COUNT] key is used for counting pieces. Pressing the [COUNT] key will toggle between the count and weight display. The annunciator for the count mode will be distinguished by a p for pieces.


To perform a new sample: 1. Access the weigh mode. 2. If a container is used, tare off the container weight by pressing the [TARE]. 3. Place the sample pieces on the scale. 4. Press and hold the [COUNT] key for two seconds. The default sample size will be displayed.

If this is the first sample with the indicator SPEC will be displayed. Use the <SEL> and <EDT> keys to enter a new sample size. The <EDT> key will enter a number and the <SEL> key will select to the next number. Be sure to use leading zeroes if sample size is less than 1000.

5. Press <OK> and the selected sample size will be stored. 6. If printing is enabled the sample quantity and weight will be printed.

UNITS Use the [UNITS] key to switch the displayed reading between lb and kg or other selected unit. This will affect the displayed and printed weight but will not affect entered data.

HOLD Use the [HOLD] key to hold a particular weight on the display regardless of a variance of weight. The hold function will be designated on the display with the annunciator. Press the [HOLD] key again to unlock the hold function.

PEAK HOLD Use the [PEAK] key to hold the largest absolute weight. Either positive or negative weight is stored in the peak value (e.g. -30 is larger than 25). The Hold annunciator is active when the display is showing the held weight. To clear the stored peak weight, hold the [PEAK] key for 2 seconds.

LIVE WEIGHT AVERAGING The [LIVE.WT] key is used to enable live weight averaging. With this feature, it is possible to determine the weight of a continually moving mass (e.g. livestock).

Press and hold the [LIVE WT] key to switch between normal weighing and live weight mode. The display will briefly show NORMAL or LIVE.WT.

During normal weighing, this key operates exactly like a manual HOLD key.

Follow the steps below for In Live-Weight mode: 1. Press the [TARE] or [ZERO] key to clear any residual weight and return the scale to the zero

state. 2. Place the mass to be weighed on the scale. 3. Once the weight moves outside the zero 'dead' band the indicator begins to calculate a long

term average that compensates for any movement in the mass. The indicator flashes the Hold annunciator and shows the current average value.

4. The Hold annunciator is steady when the final sample weight is shown on the display. 5. Press the [LIVE WT] key to force the sample to be re-calculated. 6. Once the weight is returned to the zero 'dead' band, the cycle can be repeated.

Version 2.4

SHOW TOTAL (ACCUMULATION) The SHOW.T function is used for product accumulation. The function key will be labeled [TOTAL].

The [PRINT] key is used not only to print the current weight but also to add that weight to the current total.

Press the [TOTAL] key to display count followed by the number of items in the total.

Performing an Accumulation

If the total weight is too large to display in six digits, the weight is shown in two sections labeled with the upper six digits displayed before the lower six digits.

1. Access the weight mode.

2. Turn on the accumulation feature by holding the [POWER] and [PRINT] keys simultaneously for 3 seconds. The display will show “ACC ON” when the accumulation mode is enabled and “ACC OFF” when the accumulation mode is disabled.

3. Apply the weight to be accumulated (added to total) to the scale.

4. Press the [PRINT] key to add the applied weight to the total. A ticket will also be printed.

5. Continue steps 3 and 4 for each accumulation needed. If the application is legal for trade, the weight must return to zero before another accumulation may be performed.

6. A long press of the [PRINT] key causes the total accumulated weight to be printed and then cleared. Refer to page 52 for a sample ticket. The SERIAL:TYPE option must be set to PRINT to activate this function.

Version 2.4

Chapter 5: Calibration The calibration results are stored in permanent memory for use each time the Model 250 is powered up.

Note: Some of the parameters in the setup mode can affect calibration. The BUILD and OPTION settings MUST be configured before calibration is attempted.

To perform a calibration, when in Full Setup select the CAL Group using the <GRP> key.

The calibration routine will automatically prevent the indicator from being calibrated into an application outside of its specification. If an attempt is made to calibrate outside of the permitted range, an error message will be displayed and the calibration will be aborted. Refer to Error Messages on page 63.

Note: It should not be assumed that just because the Model 250 has successfully calibrated a scale, that the scale is correct for Legal for Trade use. Refer to Chapter 6 for details on approval specifics. Always check the BUILD parameter against the approval specification.

CCAALLIIBBRRAATTIIOONN WWIITTHH TTEESSTT WWEEIIGGHHTTSS The Zero setting (CAL:ZERO) specifies a gross zero point for the scale. The Span setting (CAL:SPAN) specifies a second point (preferably close to full scale) used to convert the A/D readings into weighing units (e.g. lb).

Select either of the Zero (CAL:ZERO) or Span (CAL:SPAN) calibration items. It is important that an initial Zero calibration is performed before a SPAN calibrations. The chart shown below demonstrates how the zero and span points are used to interpret a weight reading from the load cell reading.

NOTE: Calibration points (Zero, Span and Linearization) must be spaced by at least 2% of full scale from each other.

0

500

1000

1500

2000

2500

3000

3500

0 2 4 6 8 10

Load Cell Output (mV)

Wei

ght (

Kg) Span Point

(preferably at full load)

Zero Point


ZERO Press the <SEL> key to start. The display will show the current weight. Remove all weight from the scale.

Press <SEL>, <EDT> or <OK> to execute a Zero Calibration. The display will show Z.in.P to indicate that zeroing is in progress. When the process is complete the weight will be displayed to allow the zero to be checked.

Press the <ITM> key to exit the Zero routine or press <SEL>, <EDT> or <OK> to repeat the operation.

SPAN Press <SEL> or <OK> to start. The display will show the current weight.

Add the calibration test weight to the scale. The minimum acceptable span calibration weight is 2% of the scale range. A weight this small may limit calibration accuracy. The closer the test weight is to full scale the better the accuracy.

Press <SEL> or <OK> to show the calibration weight value. Change this to the correct calibration weight using the <SEL> and <EDT> keys.

Press <ITM> or <OK> to trigger the Span Calibration routine. The display will show S.in P to indicate that spanning is in progress. When the process is complete the weight will be displayed to allow the new weight reading to be checked.

When the Span Calibration is complete, press the <ITM> key to exit the Span routine or press <SEL>, <EDT> or <OK> to re-edit the calibration weight and repeat the operation.

CCAALLIIBBRRAATTIIOONN WWIITTHH MMVV//VV EENNTTRRYY In applications where test weights are not easily available, it is possible to calibrate the Model 250 directly by entering the mV/V readings at Zero and full scale Span.

The Direct Zero setting (CAL:DIR.ZER) specifies a gross zero point for the scale. The Direct Span setting (CAL:DIR.SPN) specifies the mV/V value corresponding to an applied weight equal to the full scale reading.

This calibration technique is not compatible with linearization. Clearly the accuracy of this type of calibration is limited to the accuracy of the direct mV/V data.

DIR.ZER (DIRECT ZERO CALIBRATION ENTRY) Press the <OK> key to start. The display will show the current weight.

Press the <OK> key to enter the Direct Zero setting. Change the mV/V setting to the correct value for Zero using the <SEL> and <EDT> keys.

Press the <OK> key to store the new zero calibration. When the process is complete the display will return to weight to allow the new weight reading to be checked.

Press the <ITM> key to exit the Direct Zero routine or <OK> to repeat the operation.

Version 2.4

DIR.SPN (DIRECT SPAN CALIBRATION ENTRY) Press the <OK> key to start. The display will show the current weight.

Press the <OK> key to enter the Direct Span setting. Change the mV/V setting to the correct full scale value using the <SEL> and <EDT> keys.

Press the <OK> key to store the new span calibration. When the process is complete the display will return to the weight to allow the new weight reading to be checked.

Press the <ITM> key to leave the Direct Span routine or <OK> to repeat the operation.

UUSSIINNGG LLIINNEEAARRIIZZAATTIIOONN This section provides instructions on the use of the linearization. Linearization is used to approximate the weight output to a non-linear scale.

The chart below shows a non-linear characteristic for the load cell output. From the chart, it can be seen that the trace with no linearization applied may not be linear at approximately 750 kg. By applying one or more linearization points, more accurate weight readings can be achieved.

To perform a linearization, a calibration of the zero and full scale span points must have been performed. Both the zero and full scale calibration points are used in the linearization of the scale base. These two points are assumed to be accurately set and thus have no linearization error.

A maximum of five linearization points can be set independently between zero and full scale. Unused or unwanted points may also be cleared. The maximum correction that can be applied using a linearization point is + / - 2%.

ED.LIN (EDIT LINEARIZATION POINTS) Press the <SEL> key to step through the list of points. Each point is shown as Ln.ppp where n is the point number (1 to 5), and ppp is the approximate percentage of full scale where the linearization is applied.

For example, L1.050 indicates that linearization point one is active and was entered at about 50% of full scale. Unused linearization points are shown with a row of dashes (e.g. L2. - - -).

0

500

1000

1500

2000

2500

3000

3500

0 2 4 6 8 10

Loa d Ce ll Output (m V)

Wei

ght (

Kg)

Actual Load Cell C haracteris ticNo Linearis a tionLinearis a tion Applied

Span Point

Zero Point Linearisation Point


Press <OK> to change the linearization point selected or press <ITM> to exit without making any changes.

After pressing <OK>, the current weight reading is displayed. Add the calibration test weight to the scale. The closer the test weight is to the point of maximum error in linearity the more effective the correction will be. Press <OK> to enter a corrected weight value for this point or <ITM> to exit without making changes.

Use the <SEL> and <EDT> keys to enter the correct value of the calibration weight being used.

Press the <OK> key to trigger the linearization routine. The display will show “L.in P” to show that linearization is in progress. When the process is complete the display will show the weight to allow the new weight reading to be checked before returning to the menus.

Press <ITM> to leave the routine or <OK> to repeat the operation.

CLR.LIN (CLEAR LINEARIZATION) Press the <SEL> key to step through the list of points. Each point is shown as Ln.ppp where n is the point number (1 to 5), and ppp is the approximate percentage of full scale where the linearization is applied.

For example, L1.050 designates that linearization point one is active and was entered at about 50% of full scale. Unused linearization points are shown with a row of dashes (e.g. L2. - - -).

Press <OK> to choose the linearization point to clear. The indicator will prompt to continue with “CONT. N”. Press <ITM> to switch between Cont. N (No) and Cont. Y (Yes). The <OK> key is used to accept your choice. When “Cont. Y” has been chosen the cleared linearization point is then displayed the point (e.g. L1. - - -).

Press <ITM> to return to “CLR.LIN”.

Note: All linearization points are cleared by restoring the default calibration of the indicator. The zero and span settings are also cleared by this process.

RREESSEETT CCAALLIIBBRRAATTIIOONN To reset the calibration to factory condition, access the CAL parameter.

Refer to FAC.CAL (Restore Default Factory Calibration) page 32. The menu choice will only be available when the Full Setup mode is accessed.

Version 2.4

Chapter 6: Approvals

RREEGGUULLAARR AANNDD LLEEGGAALL FFOORR TTRRAADDEE MMOODDEESS The Model 250 may be operated in Industrial, OIML or NTEP mode. (Note: For NSC requirements, use the OIML setting.)

The industrial mode operates without an reference to trade regulations.

The OIML and NTEP modes restrict certain aspects of indicator operation to ensure compliance with the respective trade certified standards. The following table lists the operation differences for each of these modes.

Condition Industrial NTEP OIML Underload –105% of full scale –1% or –2% of full scale depending

on zero range setting –1% or –2% of full scale depending on zero range setting

Overload 105% of full scale 105% of full scale Full scale +9 divisions

Tare No restrictions on Tare Tare values must be > 0 and rounded to the nearest graduation

Tare values must be > 0

Test Modes Unlimited time allowed Limited to five seconds Limited to five seconds

The Model 250 factory default parameter setup does not ensure compliance with legal-for-trade installations as mandated by local weights and measures authorities. This chapter contains information on NTEP and OIML regulations, sealing and audit trails, and other requirements.

Since legal-for-trade requirements may vary, you must ensure that the Model 250 is installed in accordance with all local regulations.

For details on parameter setup refer to the USE (Scale Use) section page 30.

NNTTEEPP RREEQQUUIIRREEMMEENNTTSS The National Type Evaluation Program (NTEP) is a widely accepted weights and measures standard in the United States, with most states abiding by some or all of the NTEP requirements. A complete list of these regulations is available in the "Handbook 44" publication distributed by the National Institute of Standards and Technology (NIST). For more information, call (301) 975-3058, or visit http://www.nist.gov.

The Model 250 NTEP Certificate of Conformance (C.O.C.) is 05-119A2.

In order to configure the Model 250 to comply with NTEP requirements, the OPTION:USE parameter must be set to NTEP. This ensures the following:

• Serial data will not be received while in the Setup Mode. • Received alpha characters will not be displayed. • Numeric tare entries cannot be received through the serial port. • Pressing [TARE] with a gross weight of zero (0) or keying in a tare value of zero (0) will not automatically switch to the net mode. • Negative tare values are not accepted.


• Tare rounding is enforced. • When the tare value is zero, the net mode is not selectable.

Where applicable, enabling the NTEP parameter will override the current setting of other parameters.

OOIIMMLL RREEQQUUIIRREEMMEENNTTSS The International Organization of Legal Metrology is an intergovernmental body which harmonizes the national metrology regulations of its world wide members. A list of regulation publications may be obtained from the Bureau International de Métrologie Légale (BIML) in Paris, France.

In order to configure the Model 250 to comply with OIML requirements, the OPTION:USE parameter must be set to OIML. This ensures the following:

• An overload condition will result when the gross weight exceeds nine graduations over the full scale capacity.

• Full scale capacity is always referenced from the last zero calibration reference, not the last zero acquired by pressing [ZERO].

AAUUDDIITT TTRRAAIILL Audit trail parameters are designated on the Model 250 at power up. When in NTEP mode the two individual parameters will be displayed (calibration counter and setup configuration) to indicate changes to trade specific parameters.

When the OIML mode is enabled, only the calibration counter will be displayed.

Follow the instructions below to view the audit trail counter(s).

1. Press and hold the power key for 3 seconds to turn off the indicator. 2. Press the power key to turn the indicator back on. 3. The event counters will be displayed during the power up sequence for approximately two

seconds.

• The calibration counter will be identified by C.xxxxx (example: C.00005). • The setup configuration counter will be identified by F.xxxxx (example: F.00005).

PPHHYYSSIICCAALL SSEEAALL The most common sealing method is a lead-wire seal. The Model 250 provides an easy means of applying this type of seal as shown in Figure 8.

The calibration mode is enabled or disabled by pushing a button marked “setup” located on the rear of the indicator.

To seal the Model 250, the R.ENTRY parameter must be set to “ON”. Refer to page 31 for more details. Follow the steps below to access and set the R.ENTRY parameter and place the lead seal.

Version 2.4

1. Press [POWER] + [ f ] to access the setup mode. 2. Press <GRP> until the OPTION menu is displayed. 3. Press <ITM> to the R.ENTRY parameter. 4. Press <SEL> to view the parameter. 5. Press <EDT> to turn the setup button ON if set to OFF. 6. Press <OK> to accept change 7. Press [POWER] + [ f ] to save the change and exit the setup mode. 8. Press the setup button to access the setup mode and make changes or calibrate. 9. Press [POWER] + [ f ] to save the change and exit the setup mode. The setup mode cannot

be accessed without pressing the Setup button again. 10. Place the physical seal plastic cover over the load cell and comm port connectors, and then

install the drill head screw. 11. Thread the wire security seal through the indentations in the plastic cover and the drill head

screw.

Figure 8: Model 250 and Model 250SS Panel Mount Physical Seal


Figure 9: Model 250X Physical Seal

Version 2.4

Chapter 7: Setpoints The Model 250 is capable of working with two internal setpoints. The status of these setpoints is displayed on the LCD. Each setpoint is associated with a physical output driver which allows control of an external light or buzzer.

SSEETTPPOOIINNTT CCOONNNNEECCTTIIOONN Refer to Setpoint Output Connection page 18 for the method of connection of the external output drivers.

SSEETTPPOOIINNTT OOPPEERRAATTIIOONN ((225500 AANNDD 225500SSSS)) Refer to page 35 for setpoint setup parameters.

EXAMPLE: Set an underload limit condition and overload limit condition setpoints.

• Setpoint 1 is configured as an overload setpoint. The SET.PTS:TARG.HI value sets the value for the overload limit. • Setpoint 2 is an underload setpoint and its limit value is set by SET.PTS:TARG.LO value.

The SET.PTS:SRC setting allows the gross weight or displayed weight to be chosen as the source for the setpoint operation. This allows the overload and underload limits to be linked to gross weights or alternatively to be linked to the current displayed weights.

CCHHEECCKKWWEEIIGGHH OOPPEERRAATTIIOONN ((225500XX)) The Model 250X is capable of performing as a check weigher. The status of the checkweighing is displayed on the LCD as well as the Over, Pass and Under LEDs on the front of the indicator. Refer to page 22 for details on the status annunciators.

Refer to page 35 for checkweigh setup parameters.

EXAMPLE: Set the high and low limit tolerances for the acceptance window.

• Setpoint 1 is configured as the high (over) limit. The CHECK.W:OVER value sets the value for the high limit. The setpoint will trigger when the high limit value is exceeded. The red indication light will be lit. • Setpoint 2 is configured as the low (under) limit. The CHECK.W:UNDER value sets the value for the low limit. The setpoint will trigger when the weight falls below low limit value. The yellow indication light will be lit.

If the value falls between the over and under limits, the green indication light will be lit.

The CHECK.W:SRC setting allows the gross weight or displayed weight to be chosen as the source for the checkweigh operation. This allows the overload and underload limits to be linked to gross weights or alternatively to be linked to the current displayed weights.

Version 2.4

CCHHAAPPTTEERR 88:: CCOOMMMMUUNNIICCAATTIIOONNSS The Model 250 offers one bi-directional RS-232 communication port or an optional fiberoptic link (GSE-Link) for seamless communication. This provides a number of serial output options allowing communications with external devices such as printers, computers, PLCs or remote displays. For wiring connections and pinouts, refer to Communication Port Connection page 16.

The serial available functions include: • Automatic Weight Output (two formats available) • Network Communications • Master / Slave • Printing Refer to SERIAL (Serial Communications Options) page 34 for communication parameter setup details.

Be advised that the calibration counter is incremented when the calibration related steps are accessed via RS-232 port or the GSE-LINK.

AAUUTTOOMMAATTIICC WWEEIIGGHHTT OOUUTTPPUUTT The automatic output is normally used to drive remote displays, a dedicated computer, or PLC communications.

AUTO WEIGHT FORMAT STRING Choose from one of the following formats:

Format Description AUTO1 <STX> <SIGN> <WEIGHT(7)> <STATUS> <ETX> AUTO2 <STX> <SIGN> <WEIGHT(7)> <S1> <S2> <S3> <S4> <UNITS(3)> <ETX>

Format Explanations:

Data Block Name Description <STX> Start of transmission character (ASCII 02) <ETX> End of transmission character (ASCII 03) <SIGN> The sign of the weight reading (space for positive, dash (-) for negative)

<WEIGHT(7)> A seven character string containing the current weight including the decimal point. If there is no decimal point, then the first character is a space. Leading zero blanking applies

<STATUS> Provides information on the weight reading. The characters G/N/U/O/M/E represent Gross / Net / Underload / Overload / Motion / Error, respectively

<UNITS(3)> A three character string, the first character being a space, followed by the actual units (e.g. ^lb, ^kg or ^^t). If the weight reading is not stable, the unit string is sent as ^^^

<S1> Displays “G/N/U/O/E” representing Gross / Net / Underload / Overload / Error, respectively <S2> Displays “M/^” representing Motion / Stable, respectively <S3> Displays “Z/^” representing center of Zero / Non-Zero, respectively <S4> Displays “-“ representing single range


PPRRIINNTTIINNGG The Model 250 comes standard with a single fixed printing format that is as follows:

The first line contains a six digit sequential ID number that is automatically incremented with each printing, up to a maximum of 999999. The first line also contains the current date and time.

The second line shows the displayed reading, units and G for Gross or N for Net. If counting is active, the printout has a third line for the counting information (p for pieces) as follows:

Counting:

000168 06/03/2007 12:58 8.27 lb G 10 p G 0.00 lb T 8.27 lb N

Whenever a new sample is taken, the indicator prints the sample in the following format:

SAMPLE: 10 p = 6.17 lb

In addition to the printout, the indicator accumulates the weight, prints the accumulated total and number of accumulations. A long press of the [PRINT] key will print a ticket and clear these totals. The six digit sequential ID number is not cleared.

Accumulation: Accumulation with count:

If the count mode is enabled each of the individual printouts would have a third line as discussed above and the TOTAL would have an additional QTY line as follows:

000048 12/05/2006 15:10 121.4 lb G 5.3 lb T 116.1 lb N

GROSS ITEMS: 3 TOTAL GROSS: 29.68 lb NET ITEMS: 2 TOTAL NET: 18.82 lb

GROSS ITEMS: 5 TOTAL GROSS: 11.45 lb NET ITEMS: 0 TOTAL NET: 0.00 lb NET QTY: 89 p

Version 2.4

MMAASSTTEERR SSEERRIIAALL OOUUTTPPUUTT In Master mode, the Model 250 sends out the entire contents of the LCD every 100msec. This is essentially the same as AUTO output but the format of the output string is designed to allow a remote display to exactly copy the contents of the LCD including all of the annunciators and user prompts, etc. Refer to page 34 for setup details.

AADDVVAANNCCEEDD CCOOMMMMUUNNIICCAATTIIOONN

USING GSE VIEW SOFTWARE Software is available for the Model 250 which makes parameter setup simple. Simply connect the GSE Link cable or an RS-232 cable to the indicator and computer. In order to use GSE View with the Model 250X, the software revision must be 1.5 or higher.

Click on the GSE View 200 icon to launch the GSE View Software. A screen similar to the one below should be displayed.

Communicate with the Model 250 To establish a connection click on the CONNECT button. A port settings screen will appear. Be sure to click on the connection type (RS-232 or GSE-link) and then set the protocol. If a GSE Link is being used, be sure to press and hold the [GROSS/NET] button on the Model 250 until all annunciators are flashing.

Once a connection is established the Model 250 display will be echoed to the software. The Display, Log and Test tabs will be available. Click the Read Settings button to view the Setup and Calibration tabs.

Tab Description Display Shows the display of the connected Model 250 Setup View setup parameters and make changes Calibration Calibrate the Model 250 Log Plot out weight readings of 4 separate digital inputs Test Use as a communication terminal. Send commands to the indicator


It is possible to view the parameter settings, make changes to the parameters, and save the settings as a new file.

Figure 10: Settings Screen

Under the Settings tab are all of the Groups of the parameter setup. Click on that particular Group to view individual items (parameters).

PROTOCOL SUMMARY NOTE: The values used with the Read Final and Write Final commands are hexadecimal.

The Model 250 indicator contains a number of registers. The indicator is configured by reading and writing the information stored in these registers. Information such as gross weight is obtained by reading the register. The Model 250 has registers of different types to hold weights, menu options, etc.

20 mm rrrr : optional_value

Read Literal Value 05

Read Final Value in Hex 11

Com

man

ds

Write Final Value 12

Gross Weight 0026 Net Weight 0027 Target High 0171 Target Low 0172 Keypress 0008 System Status 0021 R

egis

ters

System Error 0022

Value to write (in hexadecimal)

Figure 11: Commonly Used Registers and Commands

Version 2.4

EXAMPLE: READING A WEIGHT OR SETPOINT VALUE This example shows how to capture the Net weight. It is possible to print out the displayed gross or net weight with the units and G for Gross or N for Net weight. Also view the values of the high and low setpoint targets. The entered value is always preceded with 20 and is followed with the hexadecimal code for the type of transaction and then the register of the stored data.

To view the Net weight, enter the following code:

Enter 20050027:

Then enter one of the following commands:

Command Program Send GSE View <Alt> 013 <Alt> 010 Communication Plus <CR><LF> Other terminal program

20 05 0027 :



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System Error 0022

No value needed

The indicator will respond with a message similar to the following: 9F050027: 4.23 lb N A Net weight of 4.23 lbs was returned

Codes for Read Literal Value Registers Register Description Code Example Version of the protocol 0001 V1.0 Copyright message 0002 © GSE 2006 Model of indicator 0003 250 Software version 0004 V1.20 Indicator serial number 0005 3123456 Contents of LCD display memory 0009 0100005B6D3F Save settings command 0010 Start of menu definitions 0011 OIML calibration counter 0012 00000033 NTEP calibration counter 0013 C.00011 NTEP configuration counter 0014 F.00010


Register Description Code Example Counts each new reading 0020 00169196 Indicator status 0021 00000200 Indicator error status 0022 00000000 Absolute signal in mV/V 0023 00006187 Displayed weight reading 0024 000005DC Gross or Net weight 0025 000005DCGross weight 0026 000005DCNet weight 0027 000001F4 Tare weight 0028 000003E8 Peak held weight 0029 000009C4 Manual held weight 002A 00000000 Total weight reading 002B 000009C4 Livestock weight 002C 0000001F4 Index for first register data 0042 00000001 Index for second register data 0043 00000002Index for third register data 0044 00000005 Actual full access code 00D0 000004D2 Actual safe access code 00D1 000009C4 Weight used for calibration 0100 000005DC Calibrated zero mV/V 0111 FFFFFFFF Calibrated span weight 0112 000009C4 Calibrated span mV/V 0113 000061A8 Weight at linearization points >00100000 means no point

0114 0118

08000001

Fullscale setting 0121 00000BB8 Resolution setting 0122 00000000 Decimal point position 0128 00000000Units selection 0129 000000004/6 wire operation 012A 00000000High resolution (x10) mode 012B 00000000 Trade or industrial operation 0130 00000000Filtering setting 0131 00000000Motion setting 0132 00000000Zero range setting 0133 00000000Zero tracking setting 0134 00000000Initial zero operation 0135 00000000Zero band setting 0136 00000000 Type of serial output 0140 00000000Baud rate 0141 00000000Parity and stop bits 0142 00000000Network address 0143 0000001F Reset printer sequence command 0144 Full date/time string 0150 10/16/2005 10:32 Date format selection 0151 00000000 Date 0152 00000011 Month 0153 0000000A Year 0154 000007D3 Hour 0155 0000000A Minute 0156 00000020

Version 2.4

Register Description Code Example Second 0157 00000015 Key locking 0160 00000000Special function setting 0161 00000000Auto power off setting 0162 00000000Backlight options 0163 00000000Remote key function setting 0164 00000000 Setpoint target high 0171 000007D0 Setpoint target low 0172 000003E8 Counting sample quantity 0180 0000000A

EXAMPLE: REMOTE KEYPRESS This example shows how to perform a keypress remotely. It is possible to simulate keypad keypress via RS-232 or GSE-link. Refer to the chart below for the hexadecimal code for each key. The entered value is always preceded with 20 and is followed with the code for the type of transaction and then the register of the stored data.

To perform a TARE keypress remotely, key in the following:

Enter 20120008:8003



20 12 0008 : 8003



Com

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System Error 0022

Keypress value to write (in hexadecimal)

The indicator will respond with a message similar to the following:

9F120008:0000 Where the value after the “:” indicates no key was pressed. See the Codes for Keypad Related Registers chart for a reference of related codes.


Codes for Keypad Related Registers Description CodeNo key pressed 0000

Access Setup Access to full setup menu 7001 Access to safe setup menu 7002

Key Functions Zero function 7201 Tare function 7202 Gross/Net function 7203 Print function 7204 User F1 function 7205 Power key press 7301 Power off function 7302

Physical key codes Power 8001 Zero 8002 Tare 8003 Gross/Net 8004 Print 8005 F (Function) 8006

Long presses (> 2 seconds) of the physical keys

Power 8081 Zero 8082 Tare 8083 Gross/Net 8084 Print 8085 F (Function) 8086

EXAMPLE: READING A VALUE IN HEXADECIMAL This example shows how to view the Gross weight as a hexadecimal value. The entered value is always preceded with 20 and is followed with the code for the type of transaction and then the register of the stored data.

Enter 20110026:



Version 2.4

20 11 0026 :



Com

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System Error 0022

Value to write (in hexadecimal)


9F110026:00000127

Where the value after the ":" (00000127) is the hexadecimal value of the gross weight without any decimal places or units. In decimal, this value is 295.

Register Description Code Example Version of the protocol 0001 V1.0 Copyright message 0002 © GSE 2006 Model of indicator 0003 250 Software version 0004 V1.20 Indicator serial number 0005 3123456 Contents of LCD display memory 0009 0100005B6D3F Save settings command 0010 Start of menu definitions 0011 OIML calibration counter 0012 00000033 NTEP calibration counter 0013 C.00011 NTEP configuration counter 0014 F.00010 Counts each new reading 0020 00169196 Indicator status 0021 00000200 Indicator error status 0022 00000000 Absolute signal in mV/V 0023 00006187 Displayed weight reading 0024 000005DC Gross or Net weight 0025 000005DCGross weight 0026 000005DCNet weight 0027 000001F4 Tare weight 0028 000003E8 Peak held weight 0029 000009C4 Manual held weight 002A 00000000 Total weight reading 002B 000009C4 Livestock weight 002C 0000001F4 Index for first register data 0042 00000001 Index for second register data 0043 00000002Index for third register data 0044 00000005


Register Description Code Example Actual full access code 00D0 000004D2 Actual safe access code 00D1 000009C4 Weight used for calibration 0100 000005DC Calibrated zero mV/V 0111 FFFFFFFF Calibrated span weight 0112 000009C4 Calibrated span mV/V 0113 000061A8 Weight at linearization points >00100000 means no point

0114 0118

08000001

Fullscale setting 0121 00000BB8 Resolution setting 0122 00000000 Decimal point position 0128 00000000Units selection 0129 000000004/6 wire operation 012A 00000000High resolution (x10) mode 012B 00000000 Trade or industrial operation 0130 00000000Filtering setting 0131 00000000Motion setting 0132 00000000Zero range setting 0133 00000000Zero tracking setting 0134 00000000Initial zero operation 0135 00000000Zero band setting 0136 00000000 Type of serial output 0140 00000000Baud rate 0141 00000000Parity and stop bits 0142 00000000Network address 0143 0000001F Reset printer sequence command 0144 Full date/time string 0150 10/16/2005 10:32 Date format selection 0151 00000000 Date 0152 00000011 Month 0153 0000000A Year 0154 000007D3 Hour 0155 0000000A Minute 0156 00000020 Second 0157 00000015 Key locking 0160 00000000Special function setting 0161 00000000Auto power off setting 0162 00000000Backlight options 0163 00000000Remote key function setting 0164 00000000 Setpoint target high 0171 000007D0 Setpoint target low 0172 000003E8 Counting sample quantity 0180 0000000A

Version 2.4

EXAMPLE: SETTING A VALUE For example, set the Target High value to 500 lb. Make sure the units are configured for lb at the BUILD:UNITS parameter.

Enter 20120171:1F4 (1F4 in hexadecimal = 500 decimal)



20 12 0171 : 1F4



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System Error 0022

Set high target value of 500 decimal (in hexadecimal)


81120171:0000

Where the "0000" value after the ":" indicates no errors. See the Error Codes (Registers) chart for a reference of related codes.


ERROR CODES (REGISTERS) The error code returned when a command is not processed correctly is a hexadecimal value that is a combination of the following constants.

Type Code Description REG_ERR_NONE 0000H No errors occurred REG_ERR_ERROR 8000H Always set to show an error REG_ERR_UNKNOWN 4000H Unknown error – internal use only REG_ERR_NOT_IMPLEMENTED 2000H Feature not implemented on this device REG_ERR_ACCESS_DENIED 1000H Action not permitted for the current access rights REG_ERR_UNDER_RANGE 0800H Value less than RangeMin REG_ERR_OVER_RANGE 0400H Value greater than RangeMax REG_ERR_ILLEGAL_VALUE 0200H Value not compatible with data type REG_ERR_ILLEGAL_OPERATION 0100H Operation not defined REG_ERR_CANNOT_SAVE 0080H Write operation failed REG_ERR_BAD_PARAMETER 0040H Parameter not valid REG_ERR_MENU_IN_UES 0020H Cannot modify register values while SETUP menus

are active REG_ERR_RESERVED_4 0010H Reserved for future use REG_ERR_RESERVED_3 0008H Reserved for future use REG_ERR_RESERVED_2 0004H Reserved for future use REG_ERR_RESERVED_1 0002H Reserved for future use REG_ERR_DATA_ERROR 0001H Internal data error

Version 2.4

Chapter 9: Troubleshooting ERROR MESSAGES A number of error messages may be displayed to warn of operation outside of the acceptable limits. These messages are described below. Short messages (XXXXX) will appear as a single message on the display. Longer messages (XXXXX) (YYYYY) will appear on the display in two parts, first the (XXXXX) part, then the (YYYYY) part.

WEIGHING ERRORS These messages show status messages or errors that may occur during normal weighing operation (weigh mode).

Error Message

Description Solution

(U - - - - -) The weight is below the minimum allowable weight reading.

Increase the weight or decrease the minimum allowable weight reading.

(O - - - - -) The weight is above the maximum allowable weight reading.

Warning - overloading may damage mechanical scale elements. Remove weight from load receiving element. Check the condition of load cell connections. Check for damaged load cell.

(ZERO) (ERROR)

The weight reading is beyond the limit set for Zero operation.

The operation of the [ZERO] key is limited in the setup during installation. The indicator cannot be zeroed at this weight. Increase the Zero Range (Z.RANGE) or use the [TARE] key instead.

(STABLE) (ERROR)

Scale motion has prevented a [ZERO] or [TARE] operation from occurring on command.

Wait for motion to cease and try the operation again once the scale is stable.

SETUP AND CALIBRATION ERRORS These messages show status messages or errors that may occur during the setup and calibration (setup mode).

Error Message


(ENTRY) (DENIED)

The indicator may be in Safe Setup and a parameter that requires Full Setup has been selected for editing.

Access Full Setup to edit the parameter.

More than three attempts have been made to access the setup mode with the incorrect access code.

Refer to Setup Lock-Out on page 28 for more information. Turn the Model 250 off. When the indicator is turned back on, enter the correct access code to access setup.

(LIN.PT) (LO)

An attempt has been made to set a linearization point below zero.

Entered linearization point must be between zero and full scale. Refer to Using Linearization on page 43 for more information.

(PT.TOO) (CLOSE)

An attempt has been made to place a calibration point too close to an existing calibration point.

Re-enter the calibration point. Points must be spaced by at least 2% of full scale from each other.

(RES) (LO)

The scale is configured for less than 100 graduations.

Check the resolution (count-by) and capacity settings.

(HIGH) (SPAN)

The scale is configured for more than 30,000 graduations.

Check the resolution (count-by) and capacity settings.


Error Message


(LO) (SPAN)

The load cell signal range (span) is too small for the current settings.

Incorrect span weight entered (must be between zero and full scale). Scale wiring incorrect. Wrong load cell capacity (too large). Wrong or no calibration weight added to scale.

(SPAN) (HI)

The load cell signal range (span) is too large for these settings.

Incorrect span weight entered (must be between zero and full scale). Scale wiring incorrect. Load cell capacity too small for application.

(ZERO) (LO)

An attempt has been made to calibrate zero below -2mV/V. Scale wiring incorrect

(ZERO) (HIGH)

An attempt has been made to calibrate zero above +2mV/V.

Remove all weight from scale. Scale wiring incorrect.

DIAGNOSTIC ERRORS The Model 250 will display specific codes for faults or out of tolerance conditions. These errors will be displayed as an E type error message.

Error Message


(E0001) The power supply voltage is too low. Check supply (E0002) The power supply voltage is too high. Check scale / cables (E0020) The number of graduations has been set too low or too

high. Enter the correct graduation size at BUILD:DP and BUILD:RES

(E0100) The digital setup information has been lost. enter setup (E0200)

The calibration information has been lost. recalibrate

(E0300) All setup information has been lost Enter setup and calibrate (E0400) The factory information has been lost. Return for Service (E0800) The EEPROM memory storage chip has failed Return for Service (E2000) ADC Out of Range Error. This may be caused from a

broken load cell cable. Check BUILD:CABLE setting. Check load cell cable, wiring, etc.

(E4000) The battery backed RAM data has lost data. Re-enter setup

Version 2.4

Appendix

DDIIMMEENNSSIIOONNAALL DDRRAAWWIINNGGSS Model 250 (Plastic Enclosure) Panel Mount Version

Dimensions shown in mm

3D View

Front View

Side View

Back View


Model 250 (Plastic Enclosure) Desk Mount with Battery Compartment Version


3D View

Front View

Side View

Back View

Version 2.4

Model 250 (Stainless Steel Enclosure) Panel Mount Version



Model 250X IP69K version

Dimensions shown in mm Wall Mount Indicator with Swivel Bracket

3D View Front View

Side View Bottom View

Version 2.4

SSEETTUUPP MMEENNUU QQUUIICCKK RREEFFEERREENNCCEE Note: ⊗ Full Setup only. Changing this setting will increment the Calibration Counter. 1 Full Setup only. Changing this setting will not increment the Calibration Counter. Group (GRP) Item (ITM) Page

BUILD

DP (Decimal Point Position) 29 ⊗CAP (Maximum Capacity) 29 ⊗RES (Count-by Resolution) 30 ⊗UNITS (Weighed Units) 30 ⊗HI.RES (High Resolution x 10 mode) 30 ⊗CABLE (4-Wire or 6-Wire) 30 ⊗

OPTION

USE (Scale Use) 30 ⊗FILTER (Reading Average) 30 MOTION (Motion Detection) 30 ⊗INIT.Z (Initial-Zero on Startup) 31 Z.TRAC (Zero Tracking Sensitivity) 31 ⊗Z.RANGE (Allowable Zero Operating Range) 31 ⊗Z.BAND (Zero 'Dead' Band) 31 ⊗USE (Scale Use) 31 ⊗

CAL

ZERO (Zero Calibration) 31 ⊗SPAN (Span Calibration) 32 ⊗ED.LIN (Edit Linearization Points) 32 ⊗CLR.LIN (Clear Linearization Points) 32 ⊗DIR.ZER (Direct Zero Calibration) 32 ⊗DIR.SPN (Direct Span Calibration) 32 ⊗FAC.CAL (Restore Default Factory Calibration) 32 ⊗

SPEC

SAFE.PC (Safe Security Passcode for Digital Setup) 32 FULL.PC (Full Security Passcode for Digital Setup) 33 1 KEY.LOC (Front Panel Key Locking) 33 KEY.FN (Key Functions) 33 AUT.OFF (Auto Power Off / Battery Operation) 33 B.LIGHT (Backlight Operation) 33 REM.FN (Remote Function) 34 BAT.VLT (Battery Voltage) 34

SERIAL

TYPE (Serial Output Type) 34 BAUD (Serial Baud Rate) 35 BITS (Serial Format Options) 35 ADDRES (Instrument Address) 35 RST.CON (Reset Printed Consecutive Number) 35 ⊗

SET.PTS SRC (Weight Source) 35 TARG.HI (Target for Overweight) 35 TARG.LO (Target for Underweight) 36

CLOCK

FORMAT (Date Format) 36 YEAR (Set Year) 36 MONTH (Set Month) 36 DAY (Set Day) 36 HOUR (Set Hour) 36 MINUTE (Set Minute) 36

TEST SCALE (Scale Base Test Display) 36 FRC.OUT (Force Outputs) 37

FACTRY DEFLT (Restore Factory Settings Except for Calibration and Build) 37 1 - END - Save settings and return to normal weighing mode. 37

Version 2.4

INDEX

4 4-Wire Connection, 7

6 6-Wire Connection, 7

A Access codes, 19

full setup, 25 safe setup, 24

Accessing the setup mode, 19 full setup, 19 safe setup, 19

Accumulation, 31 Address, 27 Advanced communication, 45 Annunciators

setup mode, 14 status, 14

Audit trail, 38 AUT.OFF, 25, 62 Automatic weight output, 43

B B.LIGHT, 25, 62 Basic operation, 13 BAT.VLT, 26 BAUD, 26, 48, 52, 62 BITS, 27, 48, 52, 62 BUILD, 15, 21, 62

C CABLE, 7, 22, 62, See Cable connections, 6, 7 CAL, 33, 62 Calibration, 23, 33, 62

clear linearization, 36 clear linearization points, 24 direct span, 24, 35 direct zero, 24, 34 edit linearization points, 24, 35 errors, 55 linearization, 35 mV/V entry, 34 restore, 24, 36 span, 24, 34 with test weights, 33 zero, 23, 34

Calibration counter, 16, 20, 38

NTEP, 47 OIML, 47

CAP, 21, 62 Capacity, 21 Cleaning, 5 CLOCK, 28, 62 CLR.LIN, 24, 36, 62 Connecting shields, 12 Consecutive number

reset, 27 Count, 29 Count by resolution, 22, 62

D Date. See Time & Date Date format, 28, 62 DAY, 28, 62 DC power supply, 6 Decimal point, 21, 62 DEFLT, 29, 62 Diagnostic errors, 56 Dimensional drawings, 57 DIR.SPN, 24, 34, 35, 62 DIR.ZER, 24, 34, 62 Document conventions, 2 DP, 21, 62

E ED.LIN, 24, 35, 62 Edit linearization points, 24, 35, 62 Electrical safety, 5 END, 29, 62 Error messages, 55 Exit the setup mode, 20, 29, 62

F FAC.CAL, 24, 62 Factory default, 24, 28, 29 FACTRY, 28, 62 FILTER, 22, 62 Firmware

update, 18 Force output, 62 Force outputs, 28 FORMAT, 28, 62 FRC.OUT, 28, 62 Front panel

key locking, 25, 62 FULL.PC, 25, 62 Function key, 17


G General warnings, 5 Gross/net

GSE-link activation, 17 Gross/net key, 15, 17

gse view communication, 45 Group, 21 Groups and items, 21 GRP, 21 GSE view software, 45

H HI.RES, 22, 62 High resolution, 22, 62 HOLD, 30

annunciator, 14 HOUR, 28, 62

I Industrial mode, 37 INIT.Z, 23, 62 Initial zero, 62 Initial zero, 23 Item, 21 ITM, 21

K Key functions, 25, 62 Key locking

front panel, 25, 62 KEY.FN, 25, 62 KEY.LOC, 25, 62 Keypad, 15

function key, 17 Gross/net key, 17 power key, 16 print key, 17 related register codes, 50 tare key, 16 weigh mode, 16 zero key, 16

L L.in P, 24, 36 Legal for trade, 37

audit trail, 38 NTEP, 37 OIML, 38 physical seal, 38

Live weight averaging, 30 LIVE.WT, 25, 30 Load cell connection, 7

4-wire, 7 6-wire, 7

Load cell signals, 7 Low battery annunciator, 14

M Manual set, 2 Master serial output, 45 MINUTE, 28, 62 MONTH, 28, 62 MOTION, 14, 22, 62 Motion detection, 14, 22

N Net annunciator, 14 NONE, 29 Numeric entry, 15

O Operator manual, 2 Option

GSE-link, 11 OPTION, 22, 62

P Panel mount, 5 PEAK HOLD, 30 Physical seal, 38 Power key, 16 Print key, 17 Printer connection, 9 Printing, 44

count, 44 master serial output, 45 sample, 44 sequential ID number, 44 type, 26

Protocol summary, 46

Q Quick reference

setup menu, 62 Quick start manual, 2

R Reading average, 22, 62 Reflash, 18 REM.FN, 26, 62 Remote display, 9 Remote function, 26, 62 Remote input, 9 Remote key, 9 RES, 22, 62 Reset printed consecutive number, 27 Resolution, 22, 62

high, 22, 62 Restore factory settings, 24, 28, 62 Restory factory calibration, 62 RS-232 serial, 8 RST.CON, 27, 62

Version 2.4

S S.in P, 24 Safe setup access code, 19, 24 SAFE.PC, 24, 62 Scale

setting capacity, 15 SCALE, 28, 62 Scale base test display, 28, 62 Scale Build, 23 Sealing

audit trail, 38 physical seal, 38

Selections and options, 15 Serial

baud rate, 26 master output, 45 output type, 26 parity, 27 RS-232, 8

SERIAL, 26, 62 Set hour, 28, 62 Set minute, 62 Set minutes, 28 Set month, 28, 62 Set year, 28 SET.PTS, 27, 62 Setpoint

connection, 41 high target, 27 low target, 27 operation, 41 output connection, 10

Setpoint settings, 27, 62 Setpoints

weight source, 27 Setup access button, 23 Setup display prompts, 20 Setup errors, 55 Setup lock out, 20 Setup menu quick reference, 62 Setup mode annunciators, 14 Setup parameters, 21 SHOW.T, 31 Sigma-Delta A/D converter, 1 SPAN, 24, 34, 62 SPEC, 24, 62 Special functions, 29

accumulation, 31 count, 29 hold, 30 live weight averaging, 30 peak hold, 30 test, 29 units, 30

Specifications, 2 Stability considerations, 16 Status annunciators, 14

T Tare

legal for trade, 37 Tare key, 16

setup mode, 15 weigh mode, 15

TARG.HI, 62 TARG.LO, 62 Target

high, 27, 62 low, 27, 62

Target annunciators, 14 Targets, 41 Technical reference manual, 2 Test

scale base, 28 TEST, 28, 29, 62 Time & Date, 3 TYPE, 26, 62

U Units, 30 UNITS, 22, 30, 62 Units display, 13 USE, 22, 62

W Weighing errors, 55 Weight display, 13

Y YEAR, 28, 62

Z Z.BAND, 23, 62 Z.in P, 34 Z.RANGE, 23, 62 Z.TRAC, 23, 62 Zero

initial, 23 ZERO, 34, 62 Zero annunciator, 14 Zero band, 23, 62 Zero band annunciator, 14 Zero calibration, 23 Zero key, 16

setup mode, 15 weigh mode, 15

Zero operating range, 23 Zero tracking, 23

Model 250 Series Technical Reference Manual

Version 2.4

Part Number: 39-10-42438

manual gse 250

Documents

gse locations gse

property of gse

wire connection

printer connection

written permission of

load cell connection

manual set

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