6200 user's manual - engineeringby.genie.uottawa.ca/~liang/images/magtrol/6200 manual.pdf ·...

Model 6200Model 6200Model 6200Model 6200Model 6200DynamometerDynamometerDynamometerDynamometerDynamometer

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UserUserUserUserUser’s Manual’s Manual’s Manual’s Manual’s Manual

revision

This manual was last revised: June 21, 2000

While every precaution has been exercisedin the compilation of this document,Magtrol, Inc. assumes no responsibilityfor errors or omissions. Additionally, noliability is assumed for any damages thatmay result from the use of the informationcontained within this publication.

LabVIEW® is a registered trademark ofNational Instruments Corporation.

RadioShack® is a registered trademark ofthe RadioShack Corporation.

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Sales and TSales and TSales and TSales and TSales and Technical Assistanceechnical Assistanceechnical Assistanceechnical Assistanceechnical Assistance

Manufacturers of:

Motor Test Equipment!

Hysteresis Brakes and Clutches

70 Gardenville ParkwayBuffalo, New York 14224 USA

Tel: (716) 668-5555 or 1-800-828-7844Fax: (716) 668-8705

74M039 06/00 50

MAGTROL, INC.MAGTROL, INC.MAGTROL, INC.MAGTROL, INC.MAGTROL, INC.

http://www.magtrol.com

iii

Safety NotesSafety NotesSafety NotesSafety NotesSafety Notes

1. Make sure that all Magtrol dynamometers and electronic products are earth-grounded, to ensure personal safety and proper operation.

2. Check line voltage before operating the 6200.

3. Make sure that dynamometers and motors under test are equipped withappropriate safety guards.

iv

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v

TTTTTable of Contentsable of Contentsable of Contentsable of Contentsable of Contents

SALES AND TECHNICAL ASSISTANCE .............................................................................................. ii

SAFETY NOTES .................................................................................................................................... iii

1 - INTRODUCTION ................................................................................................................................ 1About This Manual ............................................................................................................................................. 1

Shipping .............................................................................................................................................................. 1UNPACKING YOUR 6200 ................................................................................................................................................... 1

About the Model 6200 Controller/readout .......................................................................................................... 1FEATURES ......................................................................................................................................................................... 1SPECIFICATIONS ................................................................................................................................................................. 2

Front Panel .......................................................................................................................................................... 2Figure 1. Front Panel ................................................................................................................................... 2

ENABLING SECONDARY FUNCTIONS ..................................................................................................................................... 3VACUUM FLUORESCENT DISPLAY (VFD) ............................................................................................................................ 3DISPLAYING DESIRED INFORMATION ................................................................................................................................... 3FRONT PANEL CONTROLS AND BUTTONS ............................................................................................................................. 4

Rear Panel ........................................................................................................................................................... 5Figure 2. Rear Panel ..................................................................................................................................... 5

REAR PANEL FUNCTIONS ................................................................................................................................................... 5Figure 3. Brake .............................................................................................................................................. 5Figure 4. Dynamometer Connector .............................................................................................................. 6Figure 5. Accessory Torque/Speed Output ................................................................................................... 6

2 - INSTALLATION ................................................................................................................................. 7Setting Unit for Line Voltage ............................................................................................................................. 7

Figure 6. Cover for Voltage Selector, Fuses ................................................................................................ 7

Checking Your 6200 ........................................................................................................................................... 7

3 - THE 6200 AS A STAND-ALONE UNIT (LOCAL CONTROL) .......................................................... 9Setting Desired Operating Parameters ................................................................................................................ 9

SET POWER DISPLAY TO DESIRED UNITS (WATTS, HP, OR AUX.) ........................................................................................ 9SET DISPLAY TO DESIRED TORQUE UNITS .......................................................................................................................... 9SET UP SYSTEM PARAMETERS ............................................................................................................................................ 9SET UP PASS/FAIL PARAMETERS ........................................................................................................................................ 9SET UP I/O PARAMETERS ................................................................................................................................................ 10

Setting Dynamometer Load .............................................................................................................................. 10

Using Internal Memory ..................................................................................................................................... 10STORING DATA POINTS .................................................................................................................................................... 10RECALLING DATA POINTS ................................................................................................................................................ 10EXITING THE MEMORY MODE .......................................................................................................................................... 10CLEARING THE MEMORY .................................................................................................................................................. 10

4 - THE 6200 WITH A PC (REMOTE CONTROL) ................................................................................ 11About the GPIB Interface ................................................................................................................................. 11

INSTALLING THE GPIB (IEEE-488) CONNECTOR CABLE .................................................................................................. 11Figure 7. GPIB (IEEE-488) Interface ........................................................................................................ 11

vi

CHANGING THE GPIB PRIMARY ADDRESS ........................................................................................................................ 11

Checking the 6200-To-PC Connection ............................................................................................................. 12

Programming..................................................................................................................................................... 12CODES FOR CR - LF ....................................................................................................................................................... 12

6200 Command Set ........................................................................................................................................... 12COMMAND SET FOR 6200 ................................................................................................................................................ 13

Acquiring Speed-Torque Data .......................................................................................................................... 15

Selecting the Baud Rate for the RS-232 Interface ............................................................................................ 15Figure 8. Connector Pin-Out ...................................................................................................................... 15

5 - CALIBRATION ................................................................................................................................. 16Closed-Box Calibration .................................................................................................................................... 16

Calibration Schedule ......................................................................................................................................... 16

Basic Calibration Process ................................................................................................................................. 16INITIAL CALIBRATION PROCEDURE .................................................................................................................................... 16TORQUE OFFSET AND GAIN .............................................................................................................................................. 16ACCESSORY TORQUE OFFSET AND GAIN ........................................................................................................................... 17AUXILIARY INPUT OFFSET AND GAIN ................................................................................................................................ 17ALTERNATE CALIBRATION PROCEDURE ............................................................................................................................. 17

Figure 9. Alternative Calibration ............................................................................................................... 18

6 - TROUBLESHOOTING ..................................................................................................................... 19

APPENDIX A: LABVIEW® PROGRAMMING EXAMPLES ................................................................ 20Simple Read ...................................................................................................................................................... 20

Current Stabilized ............................................................................................................................................. 21

APPENDIX B: FRONT PANEL/DISPLAY MENU FLOW CHARTS .................................................... 22Setup Menu ....................................................................................................................................................... 22

Torque Units Menu ........................................................................................................................................... 23

Aux Setup Menu ............................................................................................................................................... 23

Power Units Menu ............................................................................................................................................ 23

APPENDIX C: SCHEMATICS .............................................................................................................. 24Encoder/Switch Board ...................................................................................................................................... 24Power Supply .................................................................................................................................................... 24

DSP & Memory ................................................................................................................................................ 25

Analog I/O ........................................................................................................................................................ 26

GLOSSARY OF ABBREVIATIONS AND TERMS ............................................................................... 27

MAGTROL LIMITED WARRANTY ....................................................................................................... 29

1

ABOUT THIS MANUAL

This manual contains information about the 6200Controller/Readout and procedures for optimal use. Toobtain the best results from your unit, please follow theprocedures for operation.

SHIPPING

Your 6200 was packaged carefully for shipping. Pleasenotify your carrier and Magtrol Customer Service if youbelieve your unit was damaged in shipping.

UNPACKING YOUR 62001. Save all shipping cartons and packaging material

until you inspect the 6200.

2. Inspect the 6200 for any evidence of damage inshipping.

3. Make sure the carton contains the following:

• 6200 Controller/Readout

• Line cord

• User's Manual for the 6200

• Calibration certificate

ABOUT THE MODEL 6200 CONTROLLER/READOUT

Magtrol's Model 6200 Controller/Readout is currentregulated power supply with vacuum fluorescent displayfor Torque, Speed, and Mechanical Power. The 6200is designed to work with all Magtrol load celldynamometers, including the following dynamometermodels:

001-DH 015-DH 008-DH 517-DE

601-DH 007-DH 508-DH 518-DE

004-DH 507-DH 018-DH 001-DTH

005-DH 017-DH 518-DH 002-DTH

505-DH 517-DH 528-DH 003-DTH

1 - Introduction1 - Introduction1 - Introduction1 - Introduction1 - Introduction

FEATURES

High quality, easy to read displayVacuum fluorescent readout with 0.36" (9.1 mm) highdigits.

High-speed data acquisition120 torque and speed readings per second via IEEE(GPIB) bus.

Pass/Fail testingUpper and lower limits are programmable for torque,speed, and auxiliary input.

Current regulated supplyProvides up to 1 Amp output.

Internal data storageNonvolatile memory of up to 100 data points.

Dynamometer overload protectionMaximum power limit can be programmed to shut downif exceeded.

Two standard computer interfacesRS-232 and IEEE-488.

Additional analog inputAccepts any ± 5 VDC transducer.

Many torque measurement optionsIncludes English, metric, and SI torque readings asstandard.

Closed box calibration of torque and auxiliary inputEliminates need to open box for adjustments.

The 6200 is designed to work with any personalcomputer using an IEEE-488 or an RS-232 interface,or as a stand-alone unit. In a computer-controlledenvironment, the 6200 provides the following motortesting capabilities:

• Current regulated control of dynamometerbrake for open-loop testing

• Torque (Q) and Speed (N) data acquisition at arate of up to 120 readings per second.

2

Magtrol Model 6200 Dynamometer Controller/ReadoutChapter 1 - Introduction

SPECIFICATIONS

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FRONT PANEL

Figure 1. Front Panel

MODEL 6200CONTROLLER/DISPLAY

The front panel provides a power switch, eight control buttons, a Decrease/Increase Dial, and Vacuum FluorescentDisplay (VFD).

3

Magtrol Model 6200 Dynamometer Controller/Readout Chapter 1 - Introduction

The front panel controls and buttons, from left to right,are:

• Power switch

• Five double-function control buttons:

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• Three single-function control buttons:• SHIFT (to enable secondary functions printed

in blue above control buttons)

• Up/left arrow ! (scroll up, increasemagnitude)

• Down/right arrow " (scroll down, decreasemagnitude)

• Decrease/Increase Dial

NOTE: Refer to the table, “Front PanelControls and Buttons” on thefollowing page for furtherexplanation of button featuresand use.

ENABLING SECONDARY FUNCTIONS

To enable the secondary function of the double-functioncontrol buttons:

1. Press the blue SHIFT button and release it. (Theword SHIFT appears in the display)

2. Press a control button to enable the function shownin blue letters above the control button:

POWER UNITS, TORQUE UNITS, AUX SETUP,CLR MEM, or SETUP.

3. Press the SHIFT button again to exit the secondaryfunction.

VACUUM FLUORESCENT DISPLAY (VFD)

The VFD provides information about the controlfunctions, the motor under test, and an auxiliary inputdevice (if connected). The displays, from left to right,are:

• POWER (expressed in horsepower or watts)/AUX INPUT

• TORQUE

• SPEED

• Memory Indicator

The 6200 is shipped with the Contrast setting at zero(lowest) in order to prolong display life. If it is necessaryto increase the contrast for improved readability, usethe lowest possible setting to achieve that result. Usinga setting higher than necessary may cause displaysegments to burn-in over a period of time, resulting inuneven illumination from segment to segment.

DISPLAYING DESIRED INFORMATION

Local control:

1. Press SHIFT and release; then press POWERUNITS to see UNITS displayed.

2. Press UP ! or DOWN " to scroll throughavailable choices.

3. Press SHIFT to exit.

4. Press SHIFT and release; then press TORQUEUNITS to see UNITS displayed.

5. Press UP ! or DOWN " to scroll throughoptions for units.


7. Press RECALL to view memory contents; last in =first out.


Remote control:

Refer to “6200 Command Set” in Chapter 4 - The 6200with a PC for a list of commands recognized by the6200.

Auxiliary Input:

1. Press SHIFT and release; then press AUX SETUP.

2. Rotate Decrease/Increase Dial to select scale.


4


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FRONT PANEL CONTROLS AND BUTTONS

5

Magtrol Model 6200 Dynamometer Controller/Readout Chapter 1 - Introduction

REAR PANEL

The rear panel provides connectors and receptacles for connecting to appropriate equipment. Refer to figures 3, 4and 5 in this chapter for detailed drawings of the brake connector, dynamometer connector and accessory torque/speed output, respectively.

Figure 2. Rear Panel

REAR PANEL FUNCTIONS

The rear panel, from left to right, provides the following functions:

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Figure 3. Brake

6


Figure 4. Dynamometer Connector

1

2

3

4

5

6

7

8

9

10

11

12

13

14

COMMON

D.P.

TACH. SIGNAL

N/C

D.P.

TORQUE COMMON

TORQUE SIGNAL

N/C

N/C

+

-

+

-

TACH. +5.0 VDC

ISOLATED22 VDC

ISOLATED22 VDC

CONNECTOR SHELL& CABLE SHIELD

Figure 5. Accessory Torque/Speed Output

6 7

1 3

4 52

D.P.

D.P.

N/C

TORQUEOUTPUT

TORQUECOMMON

TACH.COMMON

TACH.SIGNAL

For use with Magtrol Readouts only.Connecting another device to this outputmay cause equipment failure.

7

Before installing your 6200, you should become familiarwith the front and rear panels, as outlined in Chapter 1-Introduction.

Make sure the 6200 is earth groundedbefore starting!

SETTING UNIT FOR LINE VOLTAGE

The 6200 will operate with either of the following powersources:

• 120V 50/60 Hz

• 240V 50/60 Hz

1. Find the line cord receptacle on rear panel. Theline cord is a detachable NEMA Standard 3 wire.

2. Make sure the selector matches the power source(numbers should match the line voltage).

If not:

• Locate the power entry module.

• Remove the line cord.

• Insert a screwdriver into the slot and open thecover.

• Slide the voltage selector so the desired linevoltage appears in the window.

• Install the appropriate fuses for that voltage.

Figure 6. Cover for Voltage Selector, Fuses

CHECKING YOUR 6200

Do not overload or stall the motor.Prolonged overload can cause the motorto overheat.

NOTE: To make sure that the 6200 isoperational, a Magtroldynamometer with a test motorinstalled must be connected tothe 6200. It is not required thatthe 6200 be connected to acomputer.

1. Connect the 6200 to the dynamometer using thefollowing cables:

• 14-pin signal cable

• 2-pin brake power cable

2. Turn on 6200 power.

Desired results:• The display panel will show all segments of

the VFD (series of rectangles), indicating thatthe 6200 is executing a self-test routine.

• Message "MAGTROL 6200" appears.

• Normal display panel appears.

3. Press the UNITS DISPLAY button and set currentoutput to 0% with Decrease/Increase Dial.

4. Start the test motor.

5. Allow the motor speed to stabilize at its no-loadspeed for a few seconds.

6. Press the BRAKE ON/OFF button to ON.

7. Turn the Decrease/Increase Dial clockwise.

Desired results:

• The torque reading will increase.

As brake power is applied, load is applied tothe motor. The applied torque increases as theDecrease/Increase Dial is turned clockwise. Formost motors, loading is indicated by motorspeed reduction.

2 - Installation2 - Installation2 - Installation2 - Installation2 - Installation

8

Magtrol Model 6200 Dynamometer Controller/ReadoutChapter 2 - Installation

8. Reduce the torque load to zero by turning theDecrease/Increase Dial counterclockwise.

Desired results:

• The torque reading will decrease.

9. Press the BRAKE ON/OFF Button to OFF.

10. Turn off power to the test motor.

NOTE: If the desired results did notoccur, please see Chapter 6 -Troubleshooting.

9

SETTING DESIRED OPERATINGPARAMETERS

NOTE: See Appendix B: Front Panel/Display Menu Flow Charts.

SET POWER DISPLAY TO DESIRED UNITS (WATTS,HP, OR AUX.)1. Press and release SHIFT.

2. Press POWER UNITS.

3. Press UP or DOWN to scroll through choices.


SET DISPLAY TO DESIRED TORQUE UNITS

1. Press and release SHIFT.

2. Press TORQUE UNITS.

3. Press UP ! or DOWN " until you see thedesired unit of measure.


SET UP SYSTEM PARAMETERS


2. Press SETUP.

3. Press SHIFT.

4. Press UP ! or DOWN " until you see thedesired unit of input torque.

5. Press SHIFT.

6. Press UP ! or DOWN " until selectionmatches encoder installed on dynamometer. (60-bit = standard)

7. Press SHIFT.

8. Use the UP ! and DOWN " buttons and theDecrease/Increase Dial to adjust the maximumpower setpoint for the dynamometer in use.


SET UP PASS/FAIL PARAMETERS


2. Press SETUP.

3. Press the DOWN " button once.

4. Press SHIFT.

5. Press UP t or DOWN u to turn ON or OFF TorquePASS/FAIL testing.

6. If ON, press SHIFT.

7. Use the UP ! and DOWN " buttons and theDecrease/Increase Dial to adjust the high limit forTorque.

8. Press SHIFT.

9. Use the UP ! and DOWN " buttons and theDecrease/Increase Dial to adjust the low limit forTorque.

10. Press SHIFT.

11. Press UP ! or DOWN " to turn ON or OFFSpeed PASS/FAIL testing.


13. Use the UP ! and DOWN " buttons and theDecrease/Increase Dial to adjust the high limit forSpeed.

14. Press SHIFT.

15. Use the UP ! and DOWN " buttons and theDecrease/Increase Dial to adjust the low limit forSpeed.

16. Press SHIFT.

17. Press UP ! or DOWN " to turn ON or OFFAuxiliary Input PASS/FAIL testing.


19. Use the UP ! and DOWN " buttons and theDecrease/Increase Dial to adjust the high limit forAuxiliary Input.

20. Press SHIFT.

21. Use the UP ! and DOWN " buttons and theDecrease/Increase Dial to adjust the low limit forAuxiliary Input.


3 - The 6200 as a Stand-3 - The 6200 as a Stand-3 - The 6200 as a Stand-3 - The 6200 as a Stand-3 - The 6200 as a Stand-Alone Unit (LAlone Unit (LAlone Unit (LAlone Unit (LAlone Unit (Local Control)ocal Control)ocal Control)ocal Control)ocal Control)

10

Magtrol Model 6200 Dynamometer Controller/ReadoutChapter 3 - The 6200 as a Stand-Alone Unit (Local Control)

SET UP I/O PARAMETERS


2. Press SETUP.

3. Press the DOWN " button twice.

4. Press SHIFT.

5. Press UP ! or DOWN " until you see thedesired contrast level.

6. Press SHIFT.

7. Press UP ! or DOWN " until you see thedesired GPIB address.

8. Press SHIFT.

9. Press UP ! or DOWN " until you see thedesired RS-232 baud rate.


SETTING DYNAMOMETER LOAD1. Press the UNITS DISPLAY button.

2. Use the Decrease/Increase Dial to adjust the currentoutput to 0%.

3. Use the BRAKE ON/OFF button to turn the brakeON.

4. Start the motor under test.

5. Use the UP ! and DOWN " buttons and theDecrease/Increase Dial to adjust the loading on themotor.

Do not exceed the capabilities of thedynamometer or the power source in use.Motors draw very large currents whenheld at locked rotor, and overheating mayresult. When using open loop currentcontrol, induction motors cannot betested beyond breakdown, except atlocked rotor.

USING INTERNAL MEMORY

STORING DATA POINTS

1. Press and release STORE. The VFD will indicateSTORE followed by a number. This indicates thememory location that contains the data.

2. Continue pressing STORE at each desired point.

RECALLING DATA POINTS

1. Press and release RECALL. The VFD will indicateRECALL followed by a number. This numberindicates the memory location that is beingdisplayed. The order of recalled data is LAST IN =FIRST OUT (LIFO). A "M" also appears to theright of the SPEED display to let the user knowthat the displayed data is from memory and not realtime data.

2. Continue pressing RECALL until all the desireddata is retrieved. Once data has been recalled, it islost from internal memory.

EXITING THE MEMORY MODE


CLEARING THE MEMORY


2. Then press CLR MEM.

11

The 6200 can be used with a personal computer tocontrol a dynamometer and to transmit data from motortesting directly to the computer.

ABOUT THE GPIB INTERFACE

(General Purpose Interface Bus)

Magtrol instruments use the GPIB (IEEE-488 Standard)for computer-to-instrument interfacing because:

• The GPIB parallel interface is faster than serialinterfaces.

• The GPIB enables testers to access up to 15instruments on one port. Because typical motortesting requires that at least five separateparameters must be synchronized, a system ofeasy, fast access to more than one instrumentis essential.

• The GPIB has rigid data formatting andhardware standards. These standards help toensure that all functions will work properlywhen the hardware and software are installed.

NOTE: The GPIB interface is notstandard on most computers. Aninterface card and driver softwaremust be installed. Magtrolrecommends NationalInstruments Corporationhardware and software.

• An IEEE-488 cable must be installed betweenthe computer and the 6200.

INSTALLING THE GPIB (IEEE-488) CONNECTOR

CABLE

Make sure both the computer and the6200 are turned OFF before installing theGPIB connector cable.

1. Connect one end of a high-quality, double-shieldedcable to the 6200 GPIB connector.

2. Connect the other end to the GPIB interface in yourPC.

Figure 7. GPIB (IEEE-488) Interface

D5

D6

D7

D8

REN

DAV-COM

NFRD-COM

NDAC-COM

IFC-COM

SRQ-COM

ATN-COM

SIGNAL GROUND

D1

D2

D3

D4

EO1

DAV

NFRD

NDAC

IFC

SRQ

ATN

SHIELD

1 13

2 14

3 15

4 16

5 17

6 18

7 19

8 20

9 21

10 22

11 23

12 24

CHANGING THE GPIB PRIMARY ADDRESS

Each instrument serviced by the GPIB has its ownPrimary Address code, which enables the computer toobtain readings from the instrument. The factory defaultsetting on the 6200 is 15.

Some PC interfaces can access from one to fifteen 4-bitprimary addresses. Other interfaces can access as manyas thirty-one 5-bit primary addresses. The 6200 usesthe 4-bit format.

1. Press the SHIFT button and release.

2. Press SETUP.

3. Press DOWN " twice.

4. Press SHIFT twice.

5. Press ! or DOWN " until you see the desiredGPIB address.

6. Press SHIFT twice to exit.

4 - The 6200 with a PC (R4 - The 6200 with a PC (R4 - The 6200 with a PC (R4 - The 6200 with a PC (R4 - The 6200 with a PC (Remote Control)emote Control)emote Control)emote Control)emote Control)

12

Magtrol Model 6200 Dynamometer Controller/ReadoutChapter 4 - The 6200 with a PC (Remote Control)

CHECKING THE 6200-TO-PCCONNECTION

NOTE: Make sure that the 6200 and itshost computer arecommunicating before acquiringdata.

1. Make sure the primary address is set correctly forthe 6200.

2. Set the input variable to 15 characters (13 variablecharacters and the two required data terminationcharacters CR and LF. (See “Programming” in thischapter.)

3. Issue output data command "OD" and read 15characters according to the instructions for yourGPIB interface.

Desired results:

• Torque/speed data will be returned

NOTE: If the desired results did notoccur, please see Chapter 6 -Troubleshooting.

PROGRAMMING

NOTE: Check the manual provided withyour software for fullinstructions.

1. Use the following information to answer theformatting questions asked when installing yourGPIB software.

• All GPIB data acquisition systems requires theuse of data termination characters. The 6200uses the GPIB standard termination characters"Carriage Return (CR)-Line Feed (LF)."Provide them in that order.

CODES FOR CR - LF

CISAB XEH CED

=RC )31($RHC D0 31

=FL )01($RHC A0 01

2. Set the timeout for at least one second, if you areasked to set a communication fault delay timeout.

• If the communication fault delay timeout is tooshort, or if the computer resets the interface tooquickly, the host instrument may stopresponding.

6200 COMMAND SET

When entering a command code:

1. Type all characters in uppercase ASCII format.

2. End all commands with a CR-LF (hex 0D-0A).

3. Do not string multiple commands together in oneline.

The character # represents a floating point numericalvalue following the command. Leading zeroes are notrequired.

13

Magtrol Model 6200 Dynamometer Controller/Readout Chapter 4 - The 6200 with a PC (Remote Control)

COMMAND SET FOR 6200

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14

Magtrol Model 6200 Dynamometer Controller/ReadoutChapter 4 - The 6200 with a PC (Remote Control)

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15

Magtrol Model 6200 Dynamometer Controller/Readout Chapter 4 - The 6200 with a PC (Remote Control)

Figure 8. Connector Pin-Out

1 2 3 4 5

6 7 8 9

RXTX

DTRGND

The 6200 is equipped with an RS-232 (serial) interface.To select the baud rate:

1. Press SHIFT and release.

2. Press SETUP button.

3. Press DOWN " twice.

4. Press SHIFT three times.

5. Press the UP ! or DOWN " buttons to cyclethrough the following available baud rates:

300 2400 9600600 4800 192001200

6. Press SHIFT to Exit

Other important communication parameters are:

• No Parity

• 8 Data Bits

• 1 Stop Bit

To wire your own serial communications cable, use thefollowing wiring diagram:

9 Pin 2 3 4 5(6200)

9 Pin 3 2 6 5(Computer)

A cable may also be purchased from your localelectronics store. A Radio Shack #26-152 cable and#26-264 null modem adapter are known to work. Thenull modem adapter must be used on the computer endof the cable.

ACQUIRING SPEED-TORQUE DATA

Speed-torque data is a fixed-length string in ASCIIformat with a floating point decimal. Use the followingstring format:

SdddddTdddd.R[cr][lf]

or

SdddddTdddd.L[cr][lf]

where . . .

S = speed in RPM. No leading zeroes are used.

d = decimal digit 0 through 9

T = torque in units selected during setup. The torquevalue always contains a decimal point.

L = counterclockwise dynamometer shaft rotation (left)

R = clockwise dynamometer shaft rotation (right)

. = decimal point. The decimal point location dependson the specific dynamometer and torque range inuse.

NOTE: The [cr] and [lf] characters willnot display.

Example:

If a motor is running at 1725 RPM clockwise, with thedynamometer loading the motor to 22.6 oz.in., the 6200will return:

S 1725T22.60R

By manipulating the string, the speed-torque and shaftdirection (if required) can be extracted. Then separatenumerical variables can be assigned to them for dataprocessing.

SELECTING THE BAUD RATE FOR THERS-232 INTERFACE

The 6200 communicates with the host computer througha DB-9 interface connector. The connector pin-out is:2-RX, 3-TX, 4-DTR, 5-GND. No other pins areconnected.

16

CLOSED-BOX CALIBRATION

The 6200 features closed-box calibration. The advantageof closed-box calibration is that the user does not haveto disassemble the case or make mechanicaladjustments. However, the calibration of the AccessoryTorque Output must be done internally with Offset andGain trim pots.

The Torque readout and Auxiliary Input can becalibrated using external reference sources. Correctionfactors for Offset and Gain are stored in nonvolatilememory. They remain in effect until the user or thecalibration house updates them.

The front panel displays the actual values for the ZEROand GAIN correction factors. Record these valuesbefore calibration. In the unlikely event of a Controller/Readout failure, it can re-initialized by pressing andholding the STORE and RECALL buttons while turningthe power on. All internal memory and setups will belost. After re-initializing, reprogram the GAIN andZERO values into memory.

CALIBRATION SCHEDULE

Calibrate your 6200:

• After any repairs are performed

• At least once a year; more frequently to ensurerequired accuracy

BASIC CALIBRATION PROCESS

The basic calibration process consists of four procedureswhich must be performed them in the following order:

1. Initial Procedure

2. Torque Offset and Gain

3. Accessory Torque Output Offset and Gain

4. Auxiliary Input Offset and Gain

To calibrate the 6200, you will need:

• External voltage reference of 0 to 5 Volts DC

• Digital multimeter (DMM) with VDC accuracyof 0.05% or better

INITIAL CALIBRATION PROCEDURE

NOTE: Record the actual correctionfactors displayed beforeproceeding with calibration.

1. Allow the 6200 to stabilize in an environment with:

• An ambient temperature of 18°C to 25°C

• Relative humidity less than 80%

2. Turn on the 6200.

3. Allow the 6200 to warm up for at least 30 minutes.

4. Enable the calibration mode as follows:

• Turn instrument power OFF

• Press in and hold the UP ! and DOWN "arrow buttons simultaneously

• Turn instrument power ON

5. Continue pressing the UP ! and DOWN "arrow buttons until the display shows the softwarerevision date.

6. Press the SHIFT button once.

NOTE: To exit CALIBRATE modewithout making any changes,press the SHIFT button six times.

TORQUE OFFSET AND GAIN

1. Connect the external voltage reference common toPin 13 of the dynamometer input connector.

2. Connect the external voltage reference high to Pin14 of the dynamometer input connector.

3. Apply +2.000 VDC.

4. Press the DISPLAY button.

5. Adjust the gain by turning the Decrease/IncreaseDial until the displayed voltage equals the referencevoltage.

NOTE: The magnitude of change perrevolution can be increased bypressing the UP ! button ordecreased by pressing theDOWN " button.

5 - Calibration5 - Calibration5 - Calibration5 - Calibration5 - Calibration

17

Magtrol Model 6200 Dynamometer Controller/Readout Chapter 5 - Calibration

6. Apply 0.000 VDC.

7. Press the UNITS DISPLAY button.

8. Adjust the Decrease/Increase Dial until the displayindicates 0 mVDC.

9. Repeat steps 3 through 8 to complete this procedure.

10. Press the SHIFT button.

11. Record the T-ZERO correction factor for futurereference.


13. Record the T-GAIN correction factor for futurereference.

ACCESSORY TORQUE OFFSET AND GAIN

1. Connect the DMM common to Pin 4 of theAccessory Torque-Speed Output connector.

2. Connect the DMM high to Pin 2 of the AccessoryTorque-Speed Output connector

3. Apply 0.000 VDC

4. Adjust R24 (OFFSET) on the circuit board for 0mVDC on the DMM.


6. Adjust R25 (GAIN) on the circuit board for +2.000VDC on the DMM.

AUXILIARY INPUT OFFSET AND GAIN

1. Press the SHIFT button once. Display indicatesAUX INPUT calibration.

2. Connect the external voltage reference to theAuxiliary Input BNC connector.





6. Apply 0.000 VDC.


8. Adjust the Decrease/Increase Dial until the displayindicates 0 mVDC.

9. Repeat steps 3 through 8 to complete this procedure.


11. Record the A_ZERO correction factor for futurereference.


13. Record the A_GAIN correction factor for futurereference.

14. Press the SHIFT button once to return to defaultdisplay.

ALTERNATE CALIBRATION PROCEDURE

The 6200 can also be calibrated by using a certifieddynamometer, calibration beam, and weight instead ofan external voltage reference.

NOTE: Magtrol suggests you do NOTuse this method. By using thealternate calibration procedure,you are calibrating the 6200 to aspecific dynamometer, not to areference standard. If youconnect the 6200 to a differentdynamometer, the resultingtorque reading may be incorrect.

1. Connect the chosen dynamometer to the 6200 usingthe 14-pin signal cable and the 2-pin brake cable.

2. Attach the calibration beam to the dynamometershaft.

3. Enter the calibration mode.

4. Press the BRAKE ON/OFF button ON to apply fullloading to the dynamometer.

5. Hang the weight on the calibration beam pin andlevel the beam.



18

Magtrol Model 6200 Dynamometer Controller/ReadoutChapter 5 - Calibration


8. Remove the weight for ZERO adjustment.


10. Adjust the Increase/Decrease Dial until the displayindicates 0 mVDC.

NOTE: The mV output of thedynamometer will be equivalentto the Weight times Distance onthe calibration beam,disregarding any decimal point.

Example:Magtrol’s HD-400-6 Dynamometer has a full-scale torque of 40.0 oz.in. The distance fromthe center of the dynamometer shaft to the pinon the calibration beam is 5 inches. Placing an8 oz. weight on the pin will produce a torque of40.0 oz.in. The mV output of the dynamometerwill be equivalent to 8 oz. multiplied by 5inches, yielding an output signal of 400 mV.

11. Repeat steps 5 through 10.

12. After completing calibration:

• Press the BRAKE ON/OFF button OFF toremove loading from the dynamometer.

13. Remove the calibration beam from thedynamometer shaft.

14. Proceed with your desired motor testing.

Be sure the shaft flat is facing down,tighten the cal-beam screw against theshaft flat only.

Torque = Weight (W) x Distance (D)Weight (W) = Torque / Distance (D)

D

W

Figure 9. Alternative Calibration

19

6 - T6 - T6 - T6 - T6 - Troubleshootingroubleshootingroubleshootingroubleshootingroubleshooting

If you require additional assistance, please contactMagtrol Customer Service at 1-800-828-7844 or 1-716-668-5555

MELBORP NOSAER NOITULOS

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20

Appendix AAppendix AAppendix AAppendix AAppendix A: L: L: L: L: LabVIEWabVIEWabVIEWabVIEWabVIEW®®®®® P P P P Programming Examplesrogramming Examplesrogramming Examplesrogramming Examplesrogramming Examples

SIMPLE READ

Magtrol offers a comprehensive motor-test software program to satisfy most of your programming needs. To orderyour software, call Magtrol Sales at 1-800-828-7844 or 1-716-668-5555.

21

Magtrol Model 6200 Dynamometer Controller/Readout Appendix A: LabVIEW Programming Examples

CURRENT STABILIZED

22

Appendix BAppendix BAppendix BAppendix BAppendix B: F: F: F: F: Front Pront Pront Pront Pront Panel/Display Menu Flow Chartsanel/Display Menu Flow Chartsanel/Display Menu Flow Chartsanel/Display Menu Flow Chartsanel/Display Menu Flow Charts

SETUP MENU

I/O:

CONTRAST: 0 - 3

GPIBADDRESS: 0 - 15

RS-232BAUD:

300

600

1200

2400

4800

9600

19200

AUX P/F: OFF

ON: HIGH LIMIT: 0 - 99999EXIT

LOW LIMIT: 0 - 99999

SPEED P/F: OFF

ON: HIGH LIMIT: 0 - 99999


TORQUE P/F: OFF

ON: HIGH LIMIT: 0 - 99999


SETUP: PASS/FAIL:

SYSTEM:

INPUTUNITS:

oz.in.

oz.ft.

lb.in.

lb.ft.

g.cm

kg.cm

N.mm

N.cm

N.m

60 bit

6000 bit

ENCODER: 600 bit

MAXPOWER:

0 - 99999

23

Magtrol Model 6200 Dynamometer Controller/Readout Appendix B: Front Panel/Display Menu Flow Charts

AUX SETUP MENU

POWER UNITS MENU

AUX SETUP: SCALE:0 - 10000

UNITS/VOLT

Hp

W

AUX

POWER UNITS:

oz.in.

oz.ft.

lb.in.

lb.ft.

g.cm

kg.cm

N.mm

N.cm

N.m

TORQUEUNITS:

TORQUE UNITS MENU

24

Appendix CAppendix CAppendix CAppendix CAppendix C: Schematics: Schematics: Schematics: Schematics: Schematics

POWER SUPPLY

ENCODER/SWITCH BOARD

(ROTARY ENCODER)

SPKR1

(PB0)(PB1)(PB2)(PB3)(PB4)(PB5)(PB6)(PB7)(PB8)(PB9)

(PB10)(AUDIO)

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SW5SW4

SW3SW2

SW1

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BR1

BR2

BR3

PD05

PD05

PE05

C194700

C254700

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C220.1

C210.1

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25

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Magtrol Model 6200 Dynamometer Controller/ReadoutAppendix C: Schematics

ANALOG I/O

27

GlossarGlossarGlossarGlossarGlossary of Abbreviations and Ty of Abbreviations and Ty of Abbreviations and Ty of Abbreviations and Ty of Abbreviations and Termsermsermsermserms

BNC ............................................................................. bayonet, locking-type connector

CCW ............................................................................ counterclockwise (turn to left)

CR ................................................................................ carriage return

CW ............................................................................... clockwise (turn to right)

DMM ........................................................................... digital multimeter

GPIB (General Purpose Interface Bus) ....................... parallel interface port; interchangeable with IEEE-488

Hp ................................................................................ horsepower; measure of mechanical power

Hz ................................................................................ hertz; frequency

I/O ................................................................................ input/output

LF ................................................................................ line feed

LIFO ............................................................................ LAST IN = FIRST OUT; memory function

local ............................................................................. manual control (use front panel controls)

mVDC.......................................................................... millivolts DC

N .................................................................................. speed

NEMA ......................................................................... National Electrical Manufacturers Association

PMDC .......................................................................... permanent magnet DC

Q .................................................................................. torque

remote .......................................................................... computer control (uses programmed controls from computer)

RPM ............................................................................. revolutions per minute

SI .................................................................................. Systeme Internationale units of measure

S/s ................................................................................ samples per second

V .................................................................................. volts; typically AC

VDC ............................................................................. volts DC

NotesNotesNotesNotesNotes

Magtrol, Inc. warrants its products to be free from defects in material and workmanship under normal use andservice for a period of one (1) year from the date of shipment. Software is warranted to operate in accordance withits programmed instructions on appropriate Magtrol instruments. This warranty extends only to the original purchaserand shall not apply to fuses, computer media, or any other product which, in Magtrol’s sole opinion, has beensubject to misuse, alteration, abuse or abnormal conditions of operation or shipping.

Magtrol’s obligation under this warranty is limited to repair or replacement of a product which is returned to thefactory within the warranty period and is determined, upon examination by Magtrol, to be defective. If Magtroldetermines that the defect or malfunction has been caused by misuse, alteration, abuse or abnormal conditions ofoperation or shipping, Magtrol will repair the product and bill the purchaser for the reasonable cost of repair. If theproduct is not covered by this warranty, Magtrol will, if requested by purchaser, submit an estimate of the repaircosts before work is started.

To obtain repair service under this warranty, purchaser must forward the product (transportation prepaid) and adescription of the malfunction to the factory. The instrument shall be repaired at the factory and returned to purchaser,transportation prepaid. MAGTROL ASSUMES NO RISK FOR IN-TRANSIT DAMAGE.

THE FOREGOING WARRANTY IS PURCHASER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OFALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIEDWARRANTY OF MERCHANTABILITY, OR FITNESS FOR ANY PARTICULAR PURPOSE OR USE.MAGTROL SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIALDAMAGES OR LOSS WHETHER IN CONTRACT, TORT, OR OTHERWISE.

CLAIMSImmediately upon arrival, purchaser shall check the packing container against the enclosed packing list and shall,within thirty (30) days of arrival, give Magtrol notice of shortages or any nonconformity with the terms of the order.If purchaser fails to give notice, the delivery shall be deemed to conform with the terms of the order.

The purchaser assumes all risk of loss or damage to products upon delivery by Magtrol to the carrier. If a product isdamaged in transit, PURCHASER MUST FILE ALL CLAIMS FOR DAMAGE WITH THE CARRIER to obtaincompensation. Upon request by purchaser, Magtrol will submit an estimate of the cost to repair shipment damage.

Magtrol Limited WMagtrol Limited WMagtrol Limited WMagtrol Limited WMagtrol Limited Warrantyarrantyarrantyarrantyarranty

MOTOR TESTING EQUIPMENT ! HYSTERESIS BRAKES AND CLUTCHES

70 Gardenville Parkway ! Buffalo, New York 14224Phone: (716) 668-5555 ! (800) 828-7844 Fax: (716) 668-8705

Web site: http://www.magtrol.com ! E-mail: [email protected]

6200 user's manual - engineeringby.genie.uottawa.ca/~liang/images/magtrol/6200 manual.pdf ·...

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