types f79500 & f79600 three-zone tube furnaces · the furnace controller consists of a...

1LT1083X1 • 5/17/99 Serial Number

Types F79500 & F79600Three-Zone Tube Furnaces

OPERATION MANUALAND PARTS LISTSERIES 1082 & 1083

Model Voltage Heating Zone ControlF79520 240 8" (20.32) Single Set Point AutoF79520-33 240 8" (20.32) Single Set PointF79528 208 8" (20.32) Single Set Point AutoF79530-70 240 8" (20.32) Program. 2 ramp/2 dwellF79530-33-70 240 8" (20.32) Program. 2 ramp/2 dwellF79538-70 208 8" (20.32) Program. 2 ramp/2 dwellF79540 240 8" (20.32) Multi-programmableF79540-33 240 8" (20.32) Multi-programmableF79548 208 8" (20.32) Multi-programmableF79620 240 12" (30.48) Single Set Point AutoF79620-33 240 12" (30.48) Single Set Point AutoF79628 208 12" (30.48) Single Set Point AutoF79630-70 240 12" (30.48) Program. 2 ramp/2 dwellF79630-33-70 240 12" (30.48) Program. 2 ramp/2 dwellF79638-70 208 12" (30.48) Program. 2 ramp/2 dwellF79640 240 12" (30.48) Multi-programmableF79640-33 240 12" (30.48) Multi-programmableF79648 208 12" (30.48) Multi-programmable

BARNSTEAD|THERMOLYNE CORPORATION

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Thank you for buying this Thermolyne tube furnace. We believe that you will find it to be thebest furnace of its kind available. Please note that this manual contains important operatingand safety information. You must carefully read and understand the contents of this manualprior to the use of this furnace.

Front Latch

Controller

Figure 1 F79500 Tube Furnace (F79600 layout is similar)

HEAT Lights

HEAT Switch

POWER Switch

SideLatch

SideLatch

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Model Information

240 Volt ModelsTemperature Heating

Model Amps Watts Range Zone inch’s (cm) ControlF79520 24.0 5760 100° to 1200°C 8" (20.32) Sgl. Set Point Auto.F79520-33 24.0 5760 100° to 1200°C 8" (20.32) Sgl. Set Point Auto.F79530-70 24.0 5760 100° to 1200°C 8" (20.32) Program., 2 ramp/2 dwellF79530-33-70 24.0 5760 100° to 1200°C 8" (20.32) Program., 2 ramp/2 dwellF79540 24.0 5760 100° to 1200°C 8" (20.32) Multi-Program.F79540-33 24.0 5760 100° to 1200°C 8" (20.32) Multi-Program.F79620 36.0 8640 100° to 1200°C 12" (30.48) Sgl. Set Point Auto.F79620-33 36.0 8640 100° to 1200°C 12" (30.48) Sgl. Set Point Auto.F79630-70 36.0 8640 100° to 1200°C 12" (30.48) Program., 2 ramp/2 dwellF79630-33-70 36.0 8640 100° to 1200°C 12" (30.48) Program., 2 ramp/2 dwellF79640 36.0 8640 100° to 1200°C 12" (30.48) Multi-Program.F79640-33 36.0 8640 100° to 1200°C 12" (30.48) Multi-Program.

208 Volt ModelsTemperature Heating

Model Amps Watts Range Zone inch’s (cm) ControlF79528 27.6 5760 100° to 1200°C 8" (20.32) Sgl. Set Point Auto.F79538-70 27.6 5760 100° to 1200°C 8" (20.32) Program., 2 ramp/2 dwellF79548 27.6 5760 100° to 1200°C 8" (20.32) Multi-Program.F79628 41.5 8640 100° to 1200°C 12" (30.48) Sgl. Set Point Auto.F79638-70 41.5 8640 100° to 1200°C 12" (30.48) Program., 2 ramp/2 dwellF79648 41.5 8640 100° to 1200°C 12" (30.48) Multi-Program.

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Table of Contents

Types F79500 & F79600.................................................................................................................................. 1Three-Zone Tube Furnaces ............................................................................................................................. 1Model Information ............................................................................................................................................ 3Table of Contents ............................................................................................................................................. 4Safety Information ............................................................................................................................................ 6

Alert Signals .................................................................................................................................................. 6Warnings ....................................................................................................................................................... 6

Introduction ...................................................................................................................................................... 8Intended Use................................................................................................................................................. 8General Usage .............................................................................................................................................. 8Principles of Operation ................................................................................................................................. 8

Single Set Point Control ...................................................................................................................... 8“Programmable” (2 ramp & 2 dwell) .................................................................................................... 8“Multi-Programmable” (8 ramp & 8 dwell with 4 stored programs) ...................................................... 9

General Specifications ................................................................................................................................... 10Materials of Construction ............................................................................................................................ 10Weight ......................................................................................................................................................... 10Dimensions ................................................................................................................................................. 10Electrical ..................................................................................................................................................... 10Operating Parameters (Recommended) ..................................................................................................... 11Operating Charateristics ............................................................................................................................. 11Environmental Conditions ........................................................................................................................... 11Declaration of Conformity ........................................................................................................................... 11

Installation ...................................................................................................................................................... 12Unpacking ................................................................................................................................................... 12Site Selection .............................................................................................................................................. 12Electrical Connections ................................................................................................................................ 12Process Tubes ............................................................................................................................................ 13

Installing Tubes ....................................................................................................................................... 13Remote Operation of Furnace .................................................................................................................... 14

Single Set Point Temperature Control (Automatic) Operation ....................................................................... 18Operation of 2 Ramp & 2 Dwell Programmable Models ................................................................................ 228 Ramp & 8 Dwell Multi-Programmable Models ............................................................................................ 31End-Zone Operation....................................................................................................................................... 43

End-Zone Function and Use ....................................................................................................................... 43Tuning the End-Zones ................................................................................................................................ 43End-zone Control Operation - Single Set Point Models .............................................................................. 43End-zone Control Operation - 2 Ramp/2 Dwell and Multi-Programmable 8 Ramp/8 Dwell Models ........... 44

Temperature Differential .......................................................................................................................... 44Tuning ...................................................................................................................................................... 44

For Optimum Operation ................................................................................................................................. 45Furnace Atmospheres ............................................................................................................................. 45Furnace Loading ...................................................................................................................................... 45Preventative Maintenance ....................................................................................................................... 45General Cleaning Instructions ................................................................................................................. 45

Troubleshooting Tips...................................................................................................................................... 46Maintenance and Servicing ............................................................................................................................ 48

Element Replacement................................................................................................................................. 48Element Check ........................................................................................................................................ 48Replacing A Bottom Element ................................................................................................................... 49

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TABLE OF CONTENTS

Replacing A Top Element ........................................................................................................................ 52Testing For a Defective Thermocouple ....................................................................................................... 55Replacing a Thermocouple ......................................................................................................................... 55

Replacement Parts List .................................................................................................................................. 57Ordering Procedures ...................................................................................................................................... 58Wiring Diagrams............................................................................................................................................. 59Exploded Views.............................................................................................................................................. 65Exploded View Key ........................................................................................................................................ 67Material Safety Data Sheet ............................................................................................................................ 68One Year Limited Warranty ............................................................................................................................ 71

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Safety Information

Alert Signals

WarningWarning alerts apply whenthere is a possibility ofpersonal injury.

CautionCaution alerts apply whenthere is a possibility ofdamage to the equipment.

NoteNotes alert you to pertinentfacts and conditions.

Your Thermolyne F79500 or F79600 Tube Furnacehas been designed with function, reliability, and safetyin mind. It is your responsibility to install it inconformance with local electrical codes. For safeoperation, please pay attention to the alert signalsthroughout the manual.

Warnings

To avoid electrical shock, this furnace must:1. Be connected to electrical service by a

qualified electrician who ensurescompatibility between wiring, furnaceelectrical requirements, electrical service andelectrical codes.

2. Be disconnected from the power supply priorto maintenance and servicing.

3. Have the furnace safety switch operatingproperly.

4. Always use a properly sized combustiontube.

To avoid personal injury:

1. Do not use in the presence of flammable orcombustible materials; fire or explosion mayresult. This device contains componentswhich may ignite such material.

2. Do not open furnace until it has cooledsufficiently to cease to radiate dangerousamounts of heat.

3. Refer servicing to qualified personnel.

Hot Surface Hot surfaces alert you to a possibility of personal injury if you come in contact with a surface during use or for a period of time after use.

Hot Surface "Caution: Hot Surface - Avoid Contact." To avoid burns, do not touch the exterior or interior surfaces of this furnace during use or for a period of time after use.

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SAFETY INFORMATION

PLEASE NOTE THE FOLLOWING WARNINGS:

WARNING

This warning is presented for compliance with California Proposition 65 and other regulatoryagencies and only applies to the insulation in this product. This product contains refractoryceramic, refractory ceramic fiber or fiberglass insulation, which can produce respirable dustor fibers during disassembly. Dust or fibers can cause irritation and can aggravate pre-existing respiratory diseases. Refractory ceramic and refractory ceramic fibers (afterreaching 1000°C) contain crystalline silica, which can cause lung damage (silicosis). TheInternational Agency for Research on Cancer (IARC) has classified refractory ceramic fiberand fiberglass as possibly carcinogenic (Group 2B), and crystalline silica as carcinogenic tohumans (Group 1).

The insulating materials can be located in the door, the hearth collar, in the chamber of theproduct or under the hot plate top. Tests performed by the manufacturer indicate that thereis no risk of exposure to dust or respirable fibers resulting from operation of this productunder normal conditions. However, there may be a risk of exposure to respirable dust orfibers when repairing or maintaining the insulating materials, or when otherwise disturbingthem in a manner which causes release of dust or fibers. By using proper handlingprocedures and protective equipment you can work safely with these insulating materialsand minimize any exposure. Refer to the appropriate Material Safety Data Sheets (MSDS)for information regarding proper handling and recommended protective equipment. Foradditional MSDS copies, or additional information concerning the handling of refractoryceramic products, please contact the Customer Service Department atBarnstead|Thermolyne Corporation at 1-800-553-0039.

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Intended Use

The F79500 and F79600 furnaces are ideally suitedfor school, chemical and industrial laboratories.They are intended for applications requiringtemperatures up to 1200°C. See specification pagefor operating temperatures, stability and uniformity.

General usage

Do not use this product for anything other than itsintended usage.

Principles of Operation

The furnace chamber is heated by six separateheating elements embedded in a refractorymaterial, with a portion of the elements exposed formaximum heat up and cool down. The elements onthe ends of the furnace have seperate controllersand may be independantly set to hold atemperature higher or lower than the centralelement's set point. The split tube design providesfor easy loading of process tubes and allows a fastcool down. The furnace chamber is supported bythe control base, which also houses the electricalconnections.

The furnace controller consists of amicroprocessor-based three-mode (Proportional,Integral, Derivative), single set point temperaturecontroller with programmable over-temperatureprotection and thermocouple break indication.Three types of temperature controls are used:

Introduction

CautionDo not exceed limitations forcontinuous or intermittentoperating temperatureshown in the GeneralSpecifications. Exceedingthese limits will result inseverely reduced heatingelement life.

"Caution: Hot Surface -Avoid Contact." To avoidburns, do not touch theexterior or interior surfacesof this furnace during use orfor a period of time after use.

Do not open furnace until ithas cooled sufficiently andceased to radiate dangerousamounts of heat.

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Single Set Point ControlThis controller enables you to bring the furnace

up to a pre-set temperature and hold thetemperature.

“Programmable” (2 ramp & 2 dwell)This controller enables you to program 2 ramp

segments and 2 dwell segments for differenttemperature profiles.

“Multi-Programmable” (8 ramp & 8 dwell with 4stored programs)

This controller enables you to program 8 rampsegments and 8 dwell segments per program. Italso enables you to link programs together.

INTRODUCTION

Figure 2 Typical Profile for Programmable Models (Other Profiles May Be Formed)

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Materials of Construction

Aluminum inner shell, painted steel outer shell

Weight

NetF79600 165 lbs. (74.7 kg)F79500 130 Lbs. (59.1 kg)

Dimensions

In. (Cm) W H D Heating Zone WidthF79600 48.125 (122.2) 23.125 (58.7) 18.875 (47.9) 36 (91.4)F79500 34.875 (88.6) 23.125 (58.7) 18.875 (47.9) 24 (61)

Process Tube Max. Dia. LengthF79600 3" (7.6 cm) 47.75 (121.3 cm)F79500 3" (7.6 cm) 34.375 (87.3 cm)

Electrical

V W Hz AmpsF79600 208 8640 50/60 41.5

240 8640 50/60 36.0

F79500 208 5760 50/60 27.6240 5760 50/60 24.0

Operating Parameters (Recommended)

Ambient Temperature ...... 24°CRelative Humidity ............. 80% (non-condensing)

General Specifications

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Operating Charateristics

Temperature Range 100°C to 1200°CTemperature Stability ±0.5°C @ 1200°C inside process tube (for F79600)Temperature Uniformity ±2.9°C over center 12"

±2.9°C over center 24"±6.2°C over center 34"

Maximum Temperature 1200°C (Furnace may be operated continuously at thistemperature.)

Environmental Conditions

Operating: 17°C - 27°C; 20% - 80% relative humidity, non-condensing. InstallationCategory II (over-voltage) in accordance with IEC 664. Pollution Degree 2 inaccordance with IEC 664. Altitude limit: 2,000 meters.

Storage: -25°C - 65°C; 10% - 85% relative humidity.

Declaration of Conformity (-33 models only)

Barnstead|Thermolyne hereby declares under its sole responsibility that this productconforms with the technical requirements of the following standards:

EMC: EN50081-1 Generic Emission Standard; EN 50082-1 Generic ImmunityStandard.

Safety: IEC 1010-1-92 Safety requirements for electrical equipment formeasurement, control and laboratory use; Part I: General RequirementsIEC1010-2-010 Part II: Particular requirements for laboratory equipmentfor the heating of materials

per the provisions of the Electromagnetic Compatability Directive 89/336/EEC, as amendedby 92/31/EEC and 93/68/EEC, and per the provisions of the Low Voltage Directive 73/23/EEC, as amended by 93/68/EEC.

The authorized representative located within the European Community is:European ManagerBarnstead|ThermolyneSaarbrückener Str. 248D-38116 BraunschweigGermany

Copies of the Declaration of Conformity are available upon request.

GENERAL SPECIFICATIONS

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Installation

CautionBe sure ambient temperaturedoes not exceed 104°F(40°C). Ambients above thislevel may result in damageto the controller.

Allow at least six inches ofspace between the furnaceand any combustiblesurface. This permits theheat from the furnace caseto escape so as not to createa possible fire hazard.

WarningTo avoid electrical shock,this furnace must beconnected to electricalservice by a qualifiedelectrician who ensurescompatibility between wiring,furnace electricalrequirements, electricalservice and electrical codes.

Unpacking

Visually check for any physical damage to theshipping container. Inspect the equipment surfacesthat are adjacent to any damaged area.

Unpack furnace from box and remove packingmaterial from inside furnace chamber. Furnacedoes not contain a refractory process tube.

Retain the original packaging material if re-shipment is foreseen or required.

Site Selection

Install furnace on a sturdy surface. Allow at least sixinches on all sides for ventilation.

Electrical Connections

Your furnace must be wired to an electrical box bya qualified electrician. The connections must bemade with 10 AWG wires for 24 Amp models or 14AWG for 12 Amp models, suitable for temperaturesof 90°C. The electrical specifications are located onthe specification plate on the back of the furnace.Consult Barnstead|Thermolyne if your electricalservice is different than those listed on thespecification plate. Be sure the front power switch isin the OFF position before connecting the furnaceto your electrical supply.

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Process Tubes

This furnace can be used with tubes of 1", 2" or 3"diameter. Each size tube requires two tube collarsof corresponding size to hold it in position in thefurnace. Two collars in each size are supplied withthe furnace. Tubes are not supplied with thefurnace. Contact Barnstead|Thermolyne or yourlocal distributor for suppliers of process tubes.

Installing Tubes1. Unlatch and open the furnace chamber.

2. Carefully slide your tube into the roundside of an appropriately sized tube collar,inserting the tube until it is flush with thesurface of the square side of the collar.

3. Slide the other end of your tube into theround side of another appropriately sizedtube collar, again inserting the tube until itis flush with the surface of the square sideof the collar.

Figure 2 Tube Installation

Tube CollarTube Collar

ProcessTube

INSTALLATION

Note

If your process tube is muchlonger than the width of yourfurnace, you might notesome degredation in theperformance of the heatingzone of the furnace.

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4. Carefully place the tube/collar assemblyinto the lower half of the furnace, beingsure to seat the square sides of the collarsfully into the furnace case.

5. Close and latch the furnace chamber.

NoteIn some cases, your processtube may be longer than thefurnace chamber. In thiscase, carefully center theprocess tube in the furnacechamber.

INSTALLATION

NoteYour furnace can also beoperated in a verticalposition. If you wish tooperate your furnace in avertical position, contactBarnstead|Thermolyne toorder part numberAY793X1 - Support StandAccessory.

Remote Operation of Furnace

The furnace section of your Tube Furnace can beremoved from the control section, allowing you tooperate your furnace from a distance. The furnaceis supplied with 5 foot cords, allowing you to placeyour furnace up to 5 feet from the control base. Forapplications requiring a greater separation betweenthe furnace and the control section, 10 foot remoteoperation extension cords are also available fromThermolyne (order part number AY793X2 for 208Vand 220/240V, AY793X3 for 120V).

To operate your furnace from a distance:1. Disconnect the unit from the power supply.

15Figure 3 Furnace Back - Connections

ThermocoupleSignal Wires

INSTALLATION

2. Disconnect the three power cords fromthe back of the control section:

a. Turn the power cord plugcounterclockwise until it unlocks

b. Pull the plug straight out.

3. Disconnect the three door switch cordsand the three thermocouple wires fromthe back of the control section. If you willbe using the 10 foot remote operationextension cords, also disconnect the doorswitch cord from the back of the furnacesection.

4. Unlatch the two latches holding thefurnace section onto the control section.

5. Carefully lift the furnace section off thecontrol section. Place the furnace sectionin its new, remote location.

6. If you are installing the 10 foot remoteoperation extension cords:

Door Switch Cord

PowerCords

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a. Insert each power cord plug into thecorresponding plug receptacle on anextension power cord and turn thepower cord plug clockwise until itlocks.

b. Connect an extension thermocouplewire to each thermocouple wire, beingcareful to insert the thermocouplewire plug into the receptacle on theextension thermocouple wire so thatthe "+" prong on the plug is insertedinto the "+" hole on the receptacle.

7. Connect the power cords to the back ofthe control section

a. Insert a power cord plug into thecorresponding plug receptacle on theback of the control section

b. Turn the power cord plug clockwiseuntil it locks.

8. Connect the door switch cord to the backof the control section. If you are using the10 foot remote operation extension cords,

Figure 4 Remote Operation

INSTALLATION

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INSTALLATION

connect the door switch and the two doorswitch extension cords together. Connectthe unattached end to the back of thefurnace section.

9. Connect the thermocouple extension wiresto the back of the control section, beingcareful to insert each thermocouple wireplug into its corresponding receptacle onthe back of the control section so that the"+" prong on the plug is inserted into thetop hole on the receptacle.

10. Reconnect the unit to the power supply.

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Single Set Point TemperatureControl (Automatic) Operation

Controls and Displays

Power SwitchSwitch power switch to the “ON” position. TheCONTROLLER will illuminate when power is on.

Furnace Power IndicatorThe amber furnace power lights will illuminatewhenever the door is closed and the furnace isheating. These lights will cycle on and off when thefurnace reaches its set point temperature and willgo out when the door is open or when there is anover-temperature condition.

Door Safety SwitchThe door safety switch removes power from theheating elements when the door is opened. Openand close the door a few times, note that the amberfurnace power light will go out while the door isopen. If the furnace power light does not go outwhile the door is open, consult the Troubleshootingsection before proceeding.

The temperature control inthese models is a single set-point device. By using the “UP”or “DOWN” buttons a specifictemperature can be chosen.The control will cause thefurnace chamber to heat to thechosen temperature and hold itat this temperature until youturn off the power switch orselect another temperature.

To avoid electrical shock, thisfurnace must have the doorswitch connected andoperating properly. If thefurnace power light does not goout while the door is open,consult the Troubleshootingsection before proceeding.

Note

Warning

Figure 5 Single Set Point Controller

Furnace Chamber Temperature

Temperature Set Point

Alarm Indicator

Cycle Light

Down Button

Scroll Button

Secret Key

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Control ButtonsTo illuminate the “DOWN” button, “SCROLL”button, and “UP” button, touch anywhere on thefront panel.

Digital ReadoutThe Digital Readout continuously displays chamber(upper display) and set point (lower display)temperatures unless the “SCROLL” button isdepressed.

Startup DisplayWhen the power switch is turned on, the controllerwill perform a self-test to make sure controller isoperating properly. (If all four 1’s do not light up orfail to go to “8888”, contact Thermolyne.)

Adjusting Furnace Set Point TemperatureTo illuminate the “DOWN” button, “SCROLL”button, and “UP” button, touch anywhere on thefront panel.

Push the “UP” button or the “DOWN” button tomodify the temperature set point (lower digitaldisplay).

Tuning

This control incorporates a self tuning feature whichdetermines the optimum control parameters for thebest temperature accuracy. We recommend thatyou tune the furnace to your specific application toobtain the best results. Perform the followingprocedures when you first set up your furnace andeach time you change your load type or operatingtemperature.

When performing operationswith the controller, rememberthat if more than eight to tenseconds elapse before thebuttons are used again, thedisplay screen willautomatically switch back todisplaying chambertemperature. If this happens,light up the front panel againand step through eachparameter until you reach thepoint at which the interruptionoccurred. The parametervalues you adjusted earlier,however, will not be lost oraltered. Holding down on the“SCROLL” button allows longerviewing time.

Note

Do not exceed limitations forcontinuous or intermittentoperating temperature shownin the General Specifications.Exceeding these limits willresult in severely reducedheating element life.

Caution

SINGLE SET POINT TEMPERATURE CONTROL (AUTOMATIC) OPERATION

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To tune your furnace:Load your furnace with a load characteristic ofthose you intend to heat in it.

Set the furnace’s set point to the temperature youintend to use for your application.

Push the “SCROLL” button until "tunE” appears.To start the tuning function, push the “UP” button.

When the tuning process is started, the lowerdisplay will flash "tunE” along with the furnacetemperature set point. During tuning, thetemperature set point cannot be changed. Tochange temperature set point "tunE” must be turned“OFF.” (To stop the tuning function, push the“DOWN” button.)

Setting Controller Parameters

Changing Temperature IndicationPush “SCROLL” button once, “°C” will appear. Thisindicates temperature measurement. (ContactThermolyne if control needs to be changed to °F.)

Setting the High Alarm Temperature

(Over Temperature Protection OTP)

Push “SCROLL” button until “AL.SP” (Alarm Setpoint) appears.

If the power to furnace is“turned off” or interrupted whilein “tuning,” upon returningpower to furnace, the controllerdisplay will indicate “LinE FAIL”because sampled data couldbe questionable. To restarttuning, refer to “Tuning”procedure.

If the controller cannot maintaintemperature set point, “tunEFAIL” will appear on display.First, correct the problemresponsible for not maintainingthe temperature set point, thenrestart the “tuning” procedure.

Note



Hot Surface


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Depress either the “UP” or “DOWN” button toselect the OTP value you desire. Thermolynerecommends that you set the value either at themaximum operating temperature of the furnace ora value of 20 degrees above your workingtemperature if you desire to provide protection foryour workload.

HIAL- HIGH ALARM. (over-temperature protection, OTP)

The controller is fitted with amechanical relay which is de-energized in the alarm mode.This relay, when de-energized,removes power from theheating elements. If theprimary control circuit fails, theOTP will control the furnacetemperature at the preset valueyou have entered. It does notshut off the furnace, but willmaintain the chambertemperature at that value.

Note


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Operation of 2 Ramp & 2Dwell Programmable Models


Digital ReadoutThe digital readout continuously displays chamber(upper display) and set point (lower display)temperatures unless the PAR (parameter) button isdepressed.

If a program is in either run, Hb or Hold, pressing“PAR” once causes the lower display to indicate thecurrent segment of the program (r1, d1, r2, d2, orHb) along with °C or °F. If the program is currentlyin either d1 and d2, the value shown below theseparameters (d1 or d2) reflects the time remaining inthe segment.

While the program is in run, Hold or Hb, the setpoint shown on the bottom display is the currentworking set point.

When the controller is in idle, depressing PARshows each parameter and its current value in turnon the display. The parameter value can either bemodified with the “up” or “down” push buttons or leftunmodified.

See Parameters for a list of the controllerparameters in order.

In the event of a thermocouplebreak (open circuit), thenumeric display increasesrapidly upscale, then displays“Sn b” (sensor break), and mayalternatively flash “HiAL” (highalarm) and/or dAL (deviationalarm) and the sensor breakpower value.

A reversed thermocoupleconnection or incorrectthermocouple will cause thedisplay to read “ur”(underrange) and the controlwill maintain the sensor breakpower output value selected.

Note



Figure 6 Programmable Control (2 ramp & 2 dwell)

Furnace Chamber Temperature(At startup, displays softwareversion number)

Output Power Indicator

Nonfunctional

Scroll Button ofAdjustable Parameters

Up ButtonDown Button

Nonfunctional

Temperature Set Point

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Power SwitchSet power switch to the “ON” position. TheCONTROLLER will illuminate when power is on.


Door Safety SwitchThe door safety switch removes power from theheating elements when the door is opened. Openand close the door a few times, note that the amberfurnace power light will go out while the door isopen. If the furnace power light does not go outwhile the door is open, consult the Troubleshootingsection before proceeding.

Parameters

PROG - program options . By pushing up or downbuttons, three options can be chosen: run - to startprogram; idle - to end program; hold - to holdprogram until further action.SP - set point temperature. When running aprogram, it is the last temperature value attained.Push up or down button to set.TUNE - self-tuning feature. Push up or downbutton to set.

Remember that whenever thepower switch is turned “ON,”the furnace will begin to heat atthe set point temperature thatwas previously set. This valuewill remain unchanged for up toa year without power beingapplied to the control.

Warning


Pushbutton “A/M” and light“OP2” are inactive and notused.

Warning

Note

OPERATION OF 2 RAMP & 2 DWELL PROGRAMMABLE MODELS

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LC - loop count . The number of times the programis repeated. Push up or down button to set.r1 - ramp rate #1. The rate of heat increase ordecrease in °/minute. Push up or down button toset.L1 - temp level #1. The temp level that r1 willattain. Push up or down button to set.d1 - dwell (soak) time #1. The amount of time inminutes to hold L1 temp level #1. Push up or downbutton to set.r2 - ramp rate #2. The rate of heat increase ordecrease in °C/minute. Push up or down button toset.L2 - temp level #2. The temperature level r2 willattain. Push up or down button to set.d2 - dwell (soak) time #2. The amount of time inminutes to hold L2 temperature level #2. Push up ordown button to set.Hb - “holdback.” Automatically places theprogrammer into “HOLD” if the measured valuedeviates more than a specified amount fromprogrammer set point. When measured valuereenters the holdback band, the timing for thesegment resumes. (Parameter is expressed in °Cand only functions when running a program). Pushup or down button to set.HiAL - high alarm (over temperature protection).Push up or down button to set. Thermolynerecommends that you set the value either at themaximum operating temperature of the furnace or avalue of 20 degrees above your workingtemperature if you desire to provide protection foryour workload.

The next three parameters - Proportional Band,Integral and Derivatives - are the three controlparameters of a P.l.D. control system. Theseparameters will be set when you tune your furnace.(See Tuning .)Prop - Proportional Band.In.t - Integral Time.

When performing operationswith the controller, if youdepress and release either the“PAR,” scroll “up,” or scroll“down” push buttons and morethan 6 seconds elapse beforethe buttons are used again, thedisplay screen willautomatically switch todisplaying chambertemperature. If this happens,you will have to step througheach parameter until you reachthe point at which theinterruption occurred. Theparameter values you adjustedearlier, however, will not be lostor altered. Holding down on“PAR” allows longer viewingtime.

The controller is fitted with amechanical relay which is de-energized in the alarm mode.This relay, when de-energized,removes power from theheating elements. If theprimary control circuit fails, theOTP will control the furnacetemperature at the preset valueyou have entered. It does notshut off the furnace but willmaintain the chambertemperature at that value.

Note

Note


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dEr.t - Derivative Time.HPl - High Power Limit (%) This parameter limitsthe average maximum power that is applied to theheating elements. Remember that this parameterdoes not reduce the voltage to the elements. Itreduces the average power to the elements bycycling power on and off.C/F - Centigrade/Fahrenheit. Choose the desiredtemperature unit by depressing the “UP” or“DOWN” pushbutton.

Tuning Your Controller

This programmable control has an automatic tuningfeature which installs optimum control parametersto give the best temperature accuracy. No manualloading of control parameters is needed. We highlyrecommend using this feature to provide the besttemperature accuracy the controller can attain.Perform the following procedures when you first setup your furnace and each time you change yourload type, operating temperature, or program.

To initiate the self tune featureLoad your furnace with a load characteristic ofthose you intend to heat in it.

If you will be using the controller as a single SetPoint Controller, set the furnace’s set point to thetemperature you intend to use for your application.

If you will be running a multi-step program, setthe furnace’s set point to the value of L1 (templevel #1).

Push “PAR” button until TUNE is displayed, thenpush “UP” or “DOWN” button to turn tune “ON.”

All temperature dependentparameters are automaticallyconverted when thetemperature unit (C or F) ischanged.

Note


26

During the operation, TUNE flashes in the lowerdisplay. Do not make any adjustments to thecontroller parameters during this period. The selftuning is finished when TUNE no longer flashes inthe lower display.

Self tuning will calculate values for:Proportional band - propIntegral time - Int.tDerivative time - der.t• Self tuning cannot be initiated while

running a program.

• A power failure will cause the TUNEparameter to revert back to NO. (Resettune parameter to YES).

• If there are alarm conditions during selftuning, they flash alternately with TUNE.

Operating the Controller

Single Set Point OperationThe programmable control can be used as a singleset point control or as a programmable control. Touse as a single set point control simply push the“UP” or “DOWN” buttons to choose a specifictemperature. The control will cause the furnacechamber to heat to the chosen temperature andhold this temperature until the power switch is setto "OFF" or another temperature is selected.

a. The set point temperature presently set inthe control will be read out on the lowerdisplay.


27

b. To change this set point, depress the “UP”or “DOWN” push button until the desiredset point value is displayed, then releasethe button.

c. At this point the furnace will begin to heat,if the new set point temperature you havechosen is higher than the present chambertemperature.

Programming Controller

To run a program, first determine your ramp rate,dwell times and program levels. It is helpful tograph your program for ease of loading the programinto controller.

A maximum of 2 ramp and 2 dwell segmentcombinations are available, thus enabling 2different set point levels to be achieved. Each rampis programmed by specifying the temperature level(L1) and the required ramp rate (r1). Theprogrammer then automatically calculates the timethat is required to attain the temperature level (L1)based on the desired ramp rate (r1). Dwellsegments (d1) then can be attached to eachtemperature level (L1) to hold that temperature for aspecified amount of time.

Make sure the PROG parameter is set to idle (tostop program) when entering program values. (SeeParameters .)

Push “PAR” until “r1” is displayed. Push “UP” or“DOWN” buttons and set ramp rate “r1” (heatincrease or decrease) in °C/minute.

Push “PAR” until “L1” is displayed. Push “UP” or“DOWN” buttons and set temperature level “L1.”This is the target temperature for the first ramp.

Push “PAR” until “d1” is displayed. Push “UP” or“DOWN” buttons and set dwell (soak) time “d1” inminutes.


28

Push “PAR” until “r2” is displayed. Push “UP” or“DOWN” buttons and set ramp rate “r2” in°C/minutes.

Push “PAR” until “L2” is displayed. Push “UP” or“DOWN” buttons and set temperature level “L2.”This is the target temperature for the second ramp.

Push ‘PAR’’ until “d2” is displayed. Push “UP” or“DOWN” buttons and set dwell (soak) time “d2” inminutes.

Push “PAR” until “SP” is displayed. Push “UP” or“DOWN” buttons and modify set point temperature.After “d2” dwell time has expired, thus ending theprogram, the last temperature level to be attainedwill be equal to “SP” temperature. For example, ifafter your program has been completed, you wantthe furnace to cool to ambient, set “SP” to 20. Thiswill be the last temperature level attained.

Push “PAR” until “LC” is displayed. Push “UP” or“DOWN” buttons and set “LC” (loop count - numberof times program is repeated).

Skipping SegmentsIf you desire to skip a ramp or dwell segment, followthis procedure:

• for a dwell segment, enter a setting of “0”minutes.

• for a ramp segment, enter a high valuesuch as 100°/min. This will causecontroller to skip to the next segment asfast as the furnace is capable.

Setting the Holdback FeatureThis controller features a holdback (Hb) function toensure programmed parameter values are adheredto. Holdback is set in display units (degrees C or F)and represents the allowable excursion ofmeasured value away from the current set point,either above or below, before the program is forcedinto hold (clock stops).


29

The program will remain in hold until themeasured value comes within holdback band (clockstarts). This feature is active the whole time that theprogram is running. (Holdback functions only whilerunning a program).

Push PAR until “Hb” is displayed. Select desiredholdback setting - a setting of 20° is recommended.

If a running program is forced into holdback, theilluminated dot below the “R” symbol on controllerwill flash and the PROG parameter will indicate“Hb.” When the program is in “holdback,” iteffectively lengthens the time of the program - if theholdback band “Hb” is set too low, the program willnever escape the holdback band, thus the programwill never be completed. If you do not want to usethe holdback function, set “Hb” to an extremelylarge value.

Implementing ProgramsWhen you have finished programming and areready to run your program, push “PAR” until PROGis displayed. Pushing the “UP” or “DOWN” buttons,you have three options: “Run” (to start program),“idle” (to stop program), “hold” (to hold program) -parameter values can be changed when hold ischosen.

Program ExecutionWhen “run” is selected, the program will start fromthe actual furnace temperature at that point in time.The dot under “R” on the control will illuminate toindicate the program is running.

Parameter values r1, L1, D1,r2, L2, D2 and LC cannot beadjusted while running aprogram.

Note


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Program HoldTo adjust parameters while running a program, youmust put control into “Hold.” Push “PAR” until “prog”is displayed. Push “UP” or “DOWN” buttons untilHold is displayed. When the dot underneath “R” oncontroller flashes and “Hold” is indicated at the“prog” parameter, the controller is in Hold. Now youare able to adjust all parameters. To restart theprogram, set “prog” to “run” again.

Program IdleTo stop program, push “PAR” button until “prog” isdisplayed. Push “UP” or “DOWN” buttons until “idle”is displayed. This will terminate a running program.


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8 Ramp & 8 Dwell Multi-Programmable Models


Digital Readout:The digital readout continuously displays chamber(upper display) and set point (lower display)temperatures unless the scroll button is depressed.

If the scroll button is depressed and released, thelower display will indicate output power (OP) or setpoint (SP). This is referred to as the “short scroll.”Continued single step action of scroll button willcause lower display to alternate between set point(SP) and output power (OP).

To enter the main scroll list (list of all controllerparameters that are accessed through frontkeyboard), the scroll button should be helddepressed. PR1 (program ramp rate 1) will appear.To progress through the parameter list, the scrollbutton must first be released; subsequent singlestep depression will advance you through the list.Rapid progression through the parameter list isachieved by holding the scroll button depressed.

When performing operationswith the controller, if youdepress and release either the“scroll,” “up,” or “down” pushbuttons and more than 8seconds elapse before thebuttons are used again, thedisplay screen willautomatically switch back todisplaying set pointtemperature. If this happens,you will have to step througheach parameter until you reachthe point at which theinterruption occurred. Theparameter values you adjustedearlier, however, will not be lostor altered.

Note

Figure 7 Multi-Programmable Control (8 ramp & 8 dwell)

Alarm Active Temperature Set Point

Screw Retaining Instrument in Sleeve

Furnace ChamberTemperature(At Startup, DisplaysSoftware VersionNumber)DigitalCommunications

Condition of Program,Ramp or Dwell and ifProgram is Held, RampDwell Segment CurrentlyRunningUp Button

Run/Hold Button

Down Button

Parameter Selected onSecondary Display:SP = Set PointOP = Output PowerTime = Time Remaining inProgram

Adaptive or SelfTune Selected (AT)

Scroll Button

Nonfunctional

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See Parameters for a list of the controllerparameters in order.

Power SwitchTurn power switch to the “ON” position.


Door Safety Switch:The door safety switch removes power from theheating elements when the door is opened. Openand close door a few times, note that the amberfurnace power light will go out while the door isopen. If the furnace power light does not go outwhile the door is open, consult the Troubleshootingsection before proceeding.

ParametersPnr - Program Number. The program number ofthe program you are are going to work with. Bypushing the up or down button you can select aprogram numbered from 1 to 4.PR1 - Program Ramp Rate . The rate of heatincrease or decrease in °C/minutes. Pushing the upor down button will give current setting of this ramp.PL1 - Program Level. The temperature to whichthe furnace needs to attain. Push up or down buttonto set.PD1 - Program Dwell 1. Amount of time in minutesto hold PL1 program level temperature. Push up ordown button to set.


The two center push buttonsare inactive and not used.

Remember that whenever thepower switch is turned “ON,”the furnace will begin to heat atthe set point temperature thatwas previously set in. Thisvalue will remain unchangedfor up to a year without powerbeing applied to the control.

To change from °C indicationto °F indication, contactBarnstead/Thermolyne.

Note

Caution

Warning

Note

8 RAMP & 8 DWELL MULTI-PROGRAMMABLE MODELS

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You will use the same descriptions and proceduresused for PR1, PL1, PD1 for the remaining ProgramRamp Rates PR2 - PR8, Program Levels PL2 -PL8, and Program Dwells PD2 - PD8.Cnt - Continue. Allows linking of programs. Youmay select Cnt as “y” (yes) or “n” (no) by pushingthe up or down button.HB - Holdback. Automatically places theprogrammer into “Hold” if the measured valuedeviates more than a specified amount fromprogrammer set point. When measured value re-enters the holdback band, the timing for thesegment resumes. (Parameter is expressed in °Cand only functions when running a program). Pushup or down button to set.PLC - Program Loop Count. The number of timesa program will be repeated. Push up or down buttonto set.SP1 - Set Point One. Indicates current set point.Push up or down button to set.SP2 - Set Point two. Not configured into controland nonfunctional. Set to “20”.AT - Adaptive Tune. Analyzes and inputs optimumPID values when temperature has reached setpoint. This function does not have a value; it iseither “ON” or “OFF.” (See Furnace Operation forfunction of Adaptive Tune).ATR - Adaptive Tune Range setting. Determinesthe operational band width of the adaptive tuningfunction. Self Tuning automatically determines thissetting.AL1 - Alarm 1. A full scale alarm which protectsload and furnace when temperature exceeds presetvalue. Furnace will control temperature at thepreset temperature value; it will not shut off furnace.Push up or down button to set.

Thermolyne recommends thatyou set the AL1 value either atmaximum operatingtemperature of the furnace(1100°C = 2012°F) or a valueof 20 degrees above yourworking temperature if youdesire to provide protection foryour workload.

Note


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The next three parameters - Proportional (PB)Integral (+i) and Derivative (+d) - are the threecontrol parameters of a P.l.D. control system.These parameters will be set when you tune yourfurnace. (See Self-Adaptive Tuning .)Pb - Proportional.(+i) - Integral.(+d) - Derivative.

The next two parameters - cutback low (cbl) andcutback high (cbh) - are to aid the control inpreventing temperature overshoots andundershoots. The point from set point where thepower starts “cutting back” is defined as thecutback value. These values are also automaticallyadjusted by the Self Tuning and Adaptive Tuningfeatures. These values cannot be changed by theuser; the controller automatically installs optimumcutback values when in Self Tuning and AdaptiveTuning.HL - Output Power limits the average maximumpower that is applied to the heating elements.Normal setting is 100%. If you plan to use thefurnace below 260°C (500°F) the output power maybe reduced. This will significantly shorten the time ittakes for stabilization. It will also reduce drastictemperature overshoots. Contact Barnstead/Thermolyne Customer Service for advice on theproper value to use. Remember that this parameterdoes not reduce the voltage to the elements. Itreduces the average power to the elements bycycling power on and off.HC - Cycle Time is the rate at which power issupplied to power control switch. Push up or downbutton to set.Sbr - the percent of power that is supplied to thecontrol output terminals if an openthermocouple condition exists. Push up or downbutton to check. 0.0 will be displayed. Thisparameter cannot be changed; if 0.0 is not


35

displayed, contact Barnstead/Thermolyne. Theupper display will flash “OR” if an openthermocouple condition exists.

Tuning Your Controller

The programmable control has automatic tuningfeatures which install optimum tuning parameters togive the best temperature accuracy. No manualloading of tuning parameters is needed. We highlyrecommend using these features to provide thebest temperature accuracy the controller can attain.Perform the following procedures when you first setup your furnace and each time you change yourload type, operating temperature, or program.

The following procedure is instruction on how toinitiate the SAT Self and Adaptive Tuning feature.This feature starts the controller in the Self Tunemode, then automatically switches over to theAdaptive Tuning Feature. Self Tuning permits youto retune the instrument control parameters to suitnew process conditions. Adaptive tuning takes overwhen the self tune is completed and continuouslyreevaluates the tuned parameters. Adaptive tuningwill then automatically install new values if a betterresponse could have been attained.

To initiate the tuning featureLoad your furnace with a load characteristic ofthose you intend to heat in it.

Depress the scroll button until SAT is displayed.Depress the up and down buttons simultaneously tostart self tuning. The A-T indicator is thenilluminated (upper right hand corner) and the lowerdisplay indicates the set point at which the self-tunesequence will occur. The “SP” indicator will flash for1 minute, during which time the set point may bechanged, if it is required to retune at a new set point


36

either above or below the process value indicatedon the upper display. (If you will be using thecontroller as a single Set Point Controller, set thefurnace’s set point to the temperature you intend touse for your application. If you will be running amulti-step program, set the furnace’s set point tothe value of PL1 (Program Level #1).) At the endof the minute, the “SP” indicator will stop flashing,indicating that the set point can no longer bechanged. The A-T indicator will start flashing andcontinue to flash until the self tune has completed.Once the self tune is completed, adaptive tunetakes over and the A-T indicator will remainilluminated.

To stop tuning, function scroll until SAT isdisplayed and simultaneously push up and downbuttons.

Operating the Controller

Single Set Point OperationThis programmable control can be used as a singleset point control or as a programmable control. Touse as a single set point control, simply the push upor down buttons to choose a specific temperature.Temperature set point or output power is indicatedon lower display; single depression of the scrollbutton will alternate between these two parameters.The control will cause the furnace chamber to heatto the chosen temperature and hold it at thistemperature until you turn off the power switch orselect another temperature.

Do not exceed limitations forcontinuous or intermittentoperating temperature shownin the General Specifications.Exceeding these limits willresult in severely reducedheating element life.

Caution



Hot Surface


37

a. The set point temperature presently set inthe control will be read out on the lowerdisplay.

b. To change this set point, depress the “UP”or “DOWN” push button until the desiredset point value is displayed then releasethe button.

c. At this point the furnace will begin to heatif the new set point temperature you havechosen is higher than the presentchamber temperature.

The upper display indicates the actual furnacetemperature.

Programming ControllerThe multi-programmable controller in these unitsprovides up to 4 separate programs of 8 ramps and8 dwells each. This controller also allows you to linkprograms together, which allows you to achieve 64total segments (4 programs X 16 segments). Thesefunctions are controlled by the controller’s first twoprogramming parameters, “Pnr” and “Cnt.”

A maximum of 8 ramp and 8 dwell segmentcombinations are available per program, thusenabling eight different set point levels to beachieved. Each ramp is programmed by specifyingthe program level (PL) and the required ramp rate(PR). The programmer then automaticallycalculates the time that is required to attain theprogram level (PL) based on desired ramp rate(PR). Dwell segments (soak) then can be attachedto each program level (PL) to hold that temperaturefor a specified time.


38

To run a program, first determine your ramp rate,dwell times and program levels. It is helpful tograph your program for ease of loading programinto controller.

Program EntryTo Select Program Number

Push scroll button until “Pnr 1” is displayed. Pushthe up or down button to select a program numberfrom 1 to 4.

To Link Programs TogetherPush scroll button until “Cnt n” is displayed. Pressand release the up and down buttons to switchbetween “Cnt y” (continue yes) and “Cnt n”(continue no). The effect of selecting “Cnt y” is tocontinue the program to the next program number.For example, if in program #3 you select “Cnt y,”when program #3 is complete, program #4 will runautomatically. Setting “Cnt y” in program #4 willinitiate the start of program #1 upon the completionof program #4. Each program will complete theselected number of loops before continuing (seeLoop Count). If you do not want to link programs,set Cnt to “Cnt n” (continue no).

Set Ramp Rates1. With the programmer not operating,

indicated by the bottom right hand side ofthe display extinguished, depress scrollbutton until PR1 is displayed. Push the upor down button to scroll to the desiredvalue, which is degrees per minute.

Scrolling down below zero will give three otheroptions for the ramp:

NONE-which will force the program to skipto the next segment;

Once the desired parameterhas been selected, depressingeither the raise or lower buttonwill cause the parameter to bereplaced with the new value. Atthis point, the “top dot” of theleast significant digit of thesecondary display will flash onand off. Any further use of upor down buttons will changeparameter value. In all cases,the value shown on the displayis the current working value ofthat parameter.

Note


39

END-which will cause the program to stopor restart if loops remaining is not zero;

STEP-which will cause the program toramp as quickly as possible to the nexttemperature level.

All other ramps in the program are set in a similarfashion by selecting ‘PR’ followed by the relevantramp number.

Set Level Temperatures2. The level to which the first ramp is aiming

is entered by scrolling through the mainscroll list until “PL1” is displayed. Bypressing either the up or down button, thepresent value of this level is indicated indisplay units. Using the up or down buttonwill scroll the present value to the newvalue required. All other levels in theprogram are set in a similar fashion byselecting ‘PL’ followed by the relevantnumber.

Set Dwell Times3. To set the dwell time for the first level,

scroll through the main scroll list until“Pd1” is displayed. Pressing the up ordown button will reveal the current value oftime in minutes. Using the up or downbutton will scroll the present value to thenew value required. Scrolling this valuedownscale will allow a setting of “END.” Asetting of “END” will terminate theprogram, or force it to restart if loopsremaining are not zero at the beginning ofthat dwell.

All other dwells in the program can be set in asimilar fashion by selecting “Pd” followed by therelevant dwell number.


40

Set the Number of Times to Repeat the Program4. Scrolling through the main scroll until the

parameter “PLC” is displayed and thendepressing the up or down button willreveal the present setting of the loopcount. This is the number of times that theentered program will be repeated before acontinuous set point at the last level of theprogram is achieved. By pushing the up ordown button, the number of loops can beset at any value from 1 to 999.

Set the Holdback Feature5. Scroll through the main scroll list until “HB”

is displayed. Push the up or down buttonto reveal the current value of holdback.The up or down button can now bedepressed to scroll to the required value.Holdback is set in display units andrepresents the allowable excursion ofmeasured value away from the current setpoint, either above or below, before theprogram is forced into hold. The programwill remain in hold until the measuredvalue comes within holdback limits. Thisfeature is active the whole time that theprogram is running. When hold is forcedonto the program by holdback, the“HOLD’”legend is not illuminated but eitherthe “RAMP” or “DWELL” legend will flash.


41

Implementing Programs

Program ExecutionOnce the program has been entered it can be setrunning by depressing the ‘RUN/HOLD’ push buttonon the front.

With the run initiated, the program will commenceand the legend on the display will indicate if a rampor dwell is being performed. While a program isrunning, the short scroll will contain a thirdparameter “TIME.” Push the scroll button once; timeremaining for the current segment, either ramp ordwell, will be indicated. If the loop counter has beenset to any value other than one, then the aboveprocedure will be repeated for each loop.

At the end of the complete program, an “E” willappear on the display.

Parameter Change While RunningThe parameters can be inspected but not changedwhile a program is running. If it is necessary to altera parameter while a program is running, theprogram must be placed into the hold condition. Toput a program into hold, push the run/hold buttononce. After modification of the parameter, returningthe program to the run state will cause the programto continue with the changed value(s) installed.Push run/hold button again to restart program.

Loop CountIf the loop count is set to values other than one,then the number of loops remaining in a runningprogram can be displayed. To determine which loopis being performed depress the scroll button untilLR’ is displayed and, by pushing either the up ordown button, the remaining number of loops,excluding the one being executed, is displayed.

Be sure to select the programnumber before pressing “Run/Hold.”

Note


42

Program HoldA running program can be forced into hold at anystage by depressing the “RUN/HOLD” push buttonon the front. When a running program is forced intohold, the “HOLD” legend will appear on the displaytogether with the segment type and will be flashing.Pushing “RUN/HOLD” button again will return theprogram to a run situation and extinguish the“HOLD” legend.

Program ResetA running, held or finished program can be reset bydepressing the up and down push buttons together.

When the reset has been enabled, the parts ofthe display associated with programming will beextinguished and the controller will operate as asingle set point control.

The temperature control inthese models is aprogrammable “and” automaticsingle set point device. Whenthe program has ended, thecontroller will maintain thechamber temperature at avalue equal to the lastprogrammed level (PL) until theprogram is cancelled. It will notautomatically cool to ambientunless last programmed level(PL) is set at ambient. When aprogram is cancelled, thecontroller will maintain thechamber temperature at avalue equal to the main setpoint (SP1 or SP). To cancel aprogram, depress and releasethe “UP” and “DOWN” pushbuttons simultaneously. Besure single set point mode isset to 20 degrees or below asdescribed earlier in thismanual.

Note


43

End-Zone Operation

End-Zone Function and Use

Your Thermolyne Three-Zone tube furnace allowsyou to maintain the outer two zones of your furnaceat individual set points which are different from yourcentral zone's set point. Each zone of your furnacehas a seperate amber heating light, indicating whenthe element for that zone is heating. These lightsare located on the right side of the control section.The procedure for setting your end-zone set pointsvaries, depending on the model of furnace youhave purchased.

Tuning the End-Zones

For optimum results, you should tune the end-zonecontrollers every time you tune your main controller(at initial setup and each time you change yourload, operating temperature or program). See theinstructions for each type of end-zone controller fordetails on tuning procedures.

End-zone Control Operation -Single Set Point ModelsF79520 & F79620F79528 & F79628These models use three single set point controls,one for each zone. You directly enter a temperature(in °C) for each end zone into the controller just asyou do for the central zone. The controller will thenhold the end-zone at that temperature. See theinstructions for the Single Set point Control on page18 for detailed operating and tuning instructions.

The single set pointcontrollers will accept anycombination of set points youenter, but there are physicallimits to the size of thetemperature differential thefurnace can maintain withinthe space of the processtube. ContactBarnstead|Thermolyne if yourequire specific informationon possible temperaturegradients within the threezones in order to implementyour procedures.

Note

44

End-zone Control Operation -Programmable ModelsF79530-70, F79540, F79630-70 & F79640F79538-70, F79548, F79638-70 & F79648On these models, the set point of each endpoint is notset directly, but is set as a differential from yourcentral zone's set point. This differential can be aslarge as 99.9°C above or below your central zone'sset point. Thus, if you have set your central zone's setpoint to 1000°C, you could set you right end-zone to-99.9°C and your left end-zone to +99.9°C to achievetemperatures in those zones of approximately 900°Cand 1100°C respectively.

Note that the temperatures in the end-zones are notdirectly set, but are derived from the central zone's setpoint. As a result, if you program your central zone'scontrol to execute a multi-step program, your end-zones will follow the increases and decreases in yourcentral zone's set point. Thus, if in our previousexample you had your central zone's set pointincrease from 1000°C to 1100°C, the right end-zonewould heat to 1000°C and the left end-zone wouldheat to approximately 1200°C.

Temperature DifferentialPush “UP” button or “DOWN” button to modifytemperature differential (lower digital display).

TuningTune your end-zone controllers at the same time thatyou tune your main controller.

1. Load your furnace with a load characteristicof your application.

2. Set the differential you wish to use for yourapplication.

3. Press the "PROG" button until "Tune"appears.

4. Press the up or down button to begin tuning.

END-ZONE OPERATION

NoteThe High Alarm will activateif the temperature in thecenter zone exceeds theHigh Alarm setting (factoryset at 1210°C), or if the endzone temperatures exceed ±99.9°C displayed value. Thehigh alarm will also activateif the setpoint vs. displayvalue of an end zone controlexceeds 199.8°C.

NoteThe single set pointcontrollers will accept anycombination of set pointsyou enter, but there arephysical limits to the size ofthe temperature differentialthe furnace can maintainwithin the space of theprocess tube. ContactBarnstead|Thermolyne ifyou require specificinformation on possibletemperature gradientswithin the three zones inorder to implement yourprocedures.

WarningIf both end zones are setabove center zone, runawaymay occur.

NoteNever set furnace so thatany zone will exceed 1210°C(i.e. center zone set to 1150outer zones must be +60units or less).

45

Furnace AtmospheresThese furnaces are designed to be used to 1200°Cin a respirable atmosphere only. When injectingatmospheres into the process tube, use properprocedures to avoid leakage which maycontaminate the heating elements.

The heating elements in these furnaces areattacked by fluorine, chlorine, sodium andpotassium compounds and also by molten metals.

Furnace LoadingKeep objects away from the thermocouples.Use insulated tongs, mittens and aprons when

loading and unloading the furnace.Always wear safety glasses.Never come into contact with the heating

elements. Hitting the elements with tongs or layingthe process tube against them will cause theelements to burn out.

Preventative MaintenanceHousekeeping is vital to your electric furnace –

KEEP IT CLEAN. Occasionally run your furnace upto 1600°F (871°C), empty, to burn off thecontamination that may exist on the insulation andelements. Maintain 1600°F (871°C) for at least 4hours to insure complete ashing of foreignmaterials. This is only necessary if contaminantsbuild up on the heating elements or the insulation.

Element life is reduced somewhat by repeatedheating and cooling. If the furnace is to be usedagain within a few hours, it is best to keep it at theoperating temperature or at a reduced level such as500°F (260°C).

Thermolyne highly recommends that you replacethe thermocouples periodically (once every sixmonths) to ensure temperature accuracy.

General cleaning instructionsWipe exterior surfaces with a dampened clothcontaining a mild soap solution.

For Optimum Operation

46

Troubleshooting Tips

The Troubleshooting Tips section is intended to aid in defining and correcting possibleservice problems. When using the chart, select the problem category that resembles themalfunction. Then proceed to the Possible Causes category and take necessary correctiveaction. If difficulties persist, call Barnstead|Thermolyne customer service at 1-800-553-0039.

Problem Possible Causes Solutions

The power switch does notilluminate.

The furnace is notconnected to powersupply.

Check furnace connectionto power supply.

The furnace does not heat. No power. Check power source andfuses or breakers.

Thermocouple is open. Replace thermocouple. One of the elements isburned out.

Replace the burned outelement.

Heat switch not turned"On."

Turn on Heat switch.

Slow heatup. Low line voltage. Install line of sufficient sizeand proper voltage.(Isolate furnace from otherelectrical loads.)

Heavy load in chamber. Lighten loan in chamber toallow heat to circulate.

Low ramp rate setting. Increase setting.

Repeated element burnout. Control malfunction. Replace control.Thermocouple leads arereversed.

Check thermocoupleconnections.

Oxidized thermocoupleleading to inaccuratereading.

Replace thermocouple.

Heating elementcontamination.

ContactBarnstead|Thermolyne.

47

TROUBLESHOOTING TIPS

Problem Possible Causes Solutions

Inaccurate temperaturereadout.

Oxidized or contaminatedthermocouple.

Replace thermocouple.

Poor thermocoupleconnection.

Tighten connections.

Improper loadingprocedures

Use proper loadingprocedures.

Thermocouple connectionsreversed.

Reconnect thermocouplecorrectly.

Control out of calibration. ContactBarnstead|Thermolyne.

P.I.D. values invalid. Retune control.Control malfunction. Verify and correct all

parameter andconfiguration values.

Main fuses blow or circuitbreakers trip.

Fuses or breakers notproperly rated to furnacepower requirements.

Install service line ofsufficient size to matchfurnace powerrequirement. Contactqualified electrician forassistance.

48

Maintenance and Servicing

WarningTo avoid electrical shock,this furnace must always bedisconnected from the powersupply prior to maintenanceand service.

Perform only maintenancedescribed in this manual.Contact an authorized dealeror our factory for parts andassistance.

Refer servicing to qualifiedpersonnel.

Element Replacement

The F79500 and F79600 Tube Furnaces containstwo heating elements in each zone, one in thebottom half of that zone and the other in the tophalf. Because each zone is wired serially, if oneelement burns out, the other will not receive power.Therefore, even though the entire zone will notheat, you may need to replace only one element.

Element CheckWhen an element is burnt out, the zone with theburnt out element will not heat. It will generally beobvious when a zone has a burnt out element.

On Single Set Point models, when an elementburns out in any zone, that zone will not heat. Thetemperatrue in the zone will remain far below thezone's set point. The amber "Heat" light for thatzone will remain constantly on as the controllersignals for power to go to the heating elements.

On 2 Ramp/2 Dwell or Multi-Programmable 8Ramp/8 Dwell models, if a central zone elementburns out, the furnace will not heat at all. If an endzone burns out, the temperature in that zone will lagfar behind the temperature of the central zone.When the temperature in the end-zone (as adifferential from the central set point) drops below

Figure 8 Terminal Cover Location

Terminal Covers

49

MAINTENANCE AND SERVICING

the limit set for the Deviation Alarm, "d AL" will flashon the lower display of the end-zone controller.When the temperature in the end-zone (as adifferential from the central set point) drops belowthe limit set for the Low Alarm, the furnace willautomatically shut down and "Lo Al" will flash on thelower display. In either case, the amber "Heat" lightfor the burnt out zone will be constantly on (it willnot flash). However, if the Low Alarm has shutdown the furnace and the furnace has cooledenough, the "Heat" lights for the functional zoneswill also remain fully on, since the controllers aresignalling to send power to the heating elements.

To determine which of the two heating elementsin the zone is burned out:

1. Disconnect the power from the furnace.

2. Remove the terminal cover for thesuspected zone from the back of thebottom half of the furnace section.

3. With an ohmmeter, check the continuity ofthe elements in the suspected zone. Testthe top element between the top ofterminal T1 and the top of terminal T3 onthe terminal block for the suspected zone.Test the bottom element between the topof terminal T2 and the bottom of terminalT3 on the terminal block for the suspectedzone. The element which returns an openor infinite reading must be replaced.

Replacing A Bottom Element

1. Disconnect the element leads from the topof terminal T2 and the bottom of terminalT3 on all three terminal blocks. At thesame time, disconnect the ground wirefrom the grounding bolt located to the rightof the terminal blocks.

50


2. Remove the side cover nearest the burntout element from the bottom furnacesection. (Seven black sheet metal screwssecure each side cover.)

3. Remove the bracket nearest the burnt outelement securing the element assembly.(Four pointed screws secure eachbracket.)

4. Pry off the black plastic covers coveringthe element support screws.

5. Locate the screws on the bottom of theinner shield that secure the elementsupport brackets holding the element youare replacing. Loosen these screws asnecessary to release the heating elementfrom the inner shield.

6. If you are replacing an end element, slidethe end insulation piece and the elementout of the inner shield. If you are replacingthe central element, slide the centralelement out after removing an endinsulation piece and an end element.Handle the end insulation carefully; it isfragile.

7. Note the difference in length between thetwo element lead wires and the location ofeach wire's connection to the element.Remove the element leads with theirprotective sleeves from the burnt outelement.

8. Connect the element leads to yourreplacement element. Be sure to attacheach lead in the same position that it wasattached to the old element.

51


9. Slide the new element into the inner shell,routing the element lead wires through thenotches in the inner shell. If you havereplaced the central element, place theend element you removed in step 6 backin the inner shield, routing the elementlead wires through the notches in the innershell and through the bushing in the outershell to the terminal blocks. Place the endinsulation back in the inner shield.

10. Center the element(s) and the endinsulation piece in the element supportbrackets.

11. Tighten the screws securing the elementsupport brackets until the element issecure.

12. Replace the bracket securing the elementassembly. (Four pointed screws secureeach bracket.)

13. Replace the side cover. (Seven blacksheet metal screws secure each sidecover.)

14. Connect the element lead wires markedT2 to the top of terminal T2 on eachterminal block. Connect the element leadwires marked T3 to the bottom of terminalT3 on each terminal block. Reconnect theground wires to the grounding boltslocated to the right of the terminal blocks.Be careful to ensure that you connect thewires from each element to theappropriate terminal blocks.

15. Replace the terminal block cover. Replacethe black plastic covers covering theelement support screws.

52


16. Reconnect the furnace to the powersupply and test the furnace.

Replacing A Top Element

1. Remove the thermocouple(s) from thezone requiring replacement (and an endzone if replacing the central element)using steps 2-4 of "Replacing AThermocouple."

2. Disconnect the element leads from the topof terminal T1 and the top of terminal T3on terminal block(s) of the zone(s) you arereplacing. At the same time, disconnectthe ground wire from the grounding boltlocated to the right of the terminal blocks.Remove the protective sleeves coveringthe wires between the top and bottomsections of the furnace.

3. Remove the side cover nearest the burntout element from the top furnace section.(Seven black sheet metal screws secureeach side cover.)

4. Remove the bracket nearest the burnt outelement securing the element assembly.(Four pointed screws secure eachbracket.)

5. Locate the screws on the top of the innershield that secure the element supportbrackets. Loosen these screws asnecessary to release the heating elementfrom the inner shield.

6. If you are replacing an end element, slidethe end insulation piece and the elementout of the inner shield. If you are replacing

53


the central element, slide the centralelement out after removing an endinsulation piece and an end element.Handle the insulation carefully.

7. Note the difference in length between thetwo element lead wires and the location ofeach wire's connection to the element.Remove the element leads with theirprotective sleeves from the burnt outelement.

8. Connect the element leads to yourreplacement element. Be sure to attacheach lead in the same position that it wasattached to the old element.

9. Slide the new element into the inner shell,routing the element lead wires through thenotches in the inner shell and through thebushing in the outer shell to the terminalblock(s). If you have replaced the centralelement, place the end element youremoved in step 6 back in the inner shield,routing the element lead wires through thenotches in the inner shell and through thebushing in the outer shell to the terminalblock(s). Place the end insulation back inthe inner shield.

10. Center the element(s) and the endinsulation piece in the element supportbrackets.

11. Tighten the screws securing the elementsupport brackets until the element issecure.

14. Replace the bracket securing the elementassembly. (Four pointed screws secureeach bracket.)

54


15. Replace the side cover. (Seven blacksheet metal screws secure each sidecover.)

16. Replace the protective sleeves over thewires between the two furnace sections.Route the wires to the terminal block.

17. Connect the element lead wire marked T1to the top of terminal T1 on each terminal.Connect the element lead wire marked T3to the top of terminal T3 on each teminal.Reconnect the ground wires to thegrounding bolts located to the right of theterminal blocks. Be careful to ensure thatyou connect the wires from each elementto the appropriate terminal blocks.Replace the terminal block cover.

18. Create a hole(s) for the thermocouple(s) inthe new element.

a. Place a 4" (10 cm) long, 1/4" (6 mm)drill bit into the thermocouple hole inthe inner shield (reached through theaccess hole on the top of the uppersection.)

b. Carefully press the drill bit straightdown into the furnace chamber.

19. Reinstall the thermocouple using steps 6-8of "Replacing the Thermocouple."

20. Reconnect the furnace to the powersupply and test the furnace.

55

Testing For a DefectiveThermocoupleEach central zone controller and each end-zonecontroller on the single set point models has asingle thermocouple dedicated to it. When one ofthese thermocouples fails, the controller will firstindicate a rapidly increasing temperature, then anover-range and sensor break condition. Diagnosingthe failed thermocouple is straightforward in thesesituations.

The end-zone controllers on the 2 Ramp/2 Dwelland the Multi-Programmable 8 Ramp/8 Dwellmodels each have two thermocouples wired inseries, one located in the end-zone and the otherlocated in the central zone. When one of these twothermocouples fails, the controller will first indicatea rapidly increasing temperature, then an over-range and sensor break condition. However, todiagnose the failed thermocouple, the twothermocouples must be disconnected from thethromocouple terminal blocks and then testedseperately. Using an ohm meter, check thecontinuity of each thermocouple. The one returningan open or infinite reading must be replaced.

Replacing a Thermocouple

1. Disconnect the furnace from the powersupply.

2. Remove the six black screws securingeach thermocouple access panel on thetop of the upper furnace section. Removethe access panels.

3. Locate the thermocouple terminal blocksin the compartments beneath the accesspanels. Disconnect the defective


56

thermocouple's lead wires and the signalwires from the defective thermocouple'sterminal block.

4. Carefully pull the defective thermocouplestraight out of the furnace. The ceramicthermocouple bushing will come out withthe thermocouple.

5. Move the ceramic thermocouple bushingonto the new thermocouple.

6. Carefully insert the new thermocouple intothe furnace until the lead end of thethermocouple is flush with the top of theceramic bushing. Ensure that thethermocouple tip protrudes into thefurnace chamber.

7. Connect the thermocouple signal wiresand the lead wires of the newthermocouple to the thermocouple'sterminal block.

a. Connect the yellow thermocouplesignal wire and the yellow beadedthermocouple lead wire to the "+"terminal.

b. Connect the red thermocouple signalwire and the thermocouple lead wirewith only white ceramic beads to the"-" terminal.

8. Replace the thermocouple access panelsand resecure them with the four screws.

9. Reconnect the furnace to the powersupply and test.


Central ZoneThermocouple

Left Zone

Right Zone

Figure 10 Thermocouple Location

57

Replacement Parts List

F79600 F79500Heating Element 220/240 V EL793X2A EL795X2A

208 V EL793X3A EL795X1AEnd Insulation Left Side JC793X4 JC795X1

Right Side JC793X5 JC795X2Electronic Control Single Set point CN71X55

2R/2D CN71X408R/8D CN71X56Differential CN71X58

Thermocouple TC408X1AMagnetic Relay 220/240 V RYX24

208 V RYX24Power Cordset 220/240 V CR793X2

208 V CR793X2Door Switch Cordset CR793X3Solid State Relay 220/240 V RYX62

208 V RYX62Cycle Light, Amber 220/240 V PLX104

208 V PLX104ON/OFF Power Switch 220/240 V SWX138

208 V SWX138HEAT Switch SWX108Furnace Safety Switch 04246

AccessoriesVertical Support Stand AY793X1Insulation Collars 1" I.D. JC793X1

2" I.D. JC793X23" I.D. JC793X3

10 Foot Remote Operation Extension PackageIncludes: 1 power cordset, 10 feet long; 1 thermocouple cordset, 10 feet long; and 2 door switchcords, each 5 feet long. Order the appropriate package for you furnace voltage.

220/240 V AY793X2208 V AY793X2

58

Ordering Procedures

Please refer to the Specification Plate for thecomplete model number, serial number, and seriesnumber when requesting service, replacementparts or in any correspondence concerning this unit.

All parts listed herein may be ordered from theBarnstead|Thermolyne dealer from whom youpurchased this unit or can be obtained promptlyfrom the factory. When service or replacement partsare needed we ask that you check first with yourdealer. If the dealer cannot handle your request,then contact our Customer Service Department at319-556-2241 or 800-553-0039.

Prior to returning any materials toBarnstead|Thermolyne Corp ., please contact ourCustomer Service Department for a “Return GoodsAuthorization” number (RGA). Material returnedwithout a RGA number will be refused.

59

Wiring Diagrams

Single Set Point Controller Models

DO

OR

SW

ITC

H C

AB

LE(R

EAR

VIE

W)

14

4

1

WH

T

BLK

BLK

WH

T

GR

N

GN

D.

TC+

TC-

T/C

DO

OR

SW

ITC

H P

LUG

(

UP

PER

)

ELEM

ENT

PO

WER

PLU

G

ELEM

ENT

(REA

R V

IEW

)

4

1

T3T2

T1

SWIT

CH

DO

OR

NO

WH

T

WH

TC

OM

+

T/C

PLU

G

ELEM

ENT

(

LOW

ER)

WH

T

WH

T

WH

T

WHT

WH

T/G

RN

WH

T/G

RN

YEL

RED

WH

T

T2

PLU

G

GR

N

WH

T

BLK

T/C

+

RED

YEL

T1

CH

AM

BER

GN

D.

TC+

T/C

TC-

WHT

(

LOW

ER)WH

T

WH

T

ELEM

ENT

T3

(

LEFT

)

(

ZO

NE)

SEC

TIO

N

ELEM

ENT

(

UP

PER

)

FUR

NA

CE

BLK

WH

T

GR

N

ELEM

ENT

PO

WER

T/C

PLU

G

PLU

G

WHT

WH

T

+

YEL

RED

T1T2

GN

D.

TC-

T/C

TC+

T3

ELEM

ENT

WH

T

WH

T

(

LOW

ER)

(

UP

PER

)

ELEM

ENT

FUR

NA

CE

SEC

TIO

NC

HA

MB

ER

(R

IGH

T)

(

ZO

NE)

ELEM

ENT

PO

WER

PLU

G

SEC

TIO

N

FUR

NA

CE

CH

AM

BER

(

ZO

NE)

(C

ENTE

R)

NO

TES:

REA

R V

IEW

OF

PLU

GS

SHO

WN

, 3

PLA

CES

.

GN

D

GR

N/Y

ELD

OO

R S

WIT

CH

JAC

K

VIE

W)

SWIT

CH

PO

WER

4

(REA

R

RED

YEL

RED

YEL

RED

YEL

(SH

OW

N U

PSI

DE

DO

WN

)

CO

NTR

OL

SEC

TIO

N

REC

EPTA

CLE

S SH

OW

N)

REC

EPTA

CLE

ELEM

ENT

PO

WER

(CEN

TER

ZO

NE)

(ZO

NE)

(RIG

HT)

(ZO

NE)

(CEN

TER

)

HEA

TSW

ITC

H

CA

PA

CIT

OR

(ZO

NE)

(LEF

T)

BLU

ELEM

ENT

PO

WER

REC

EPTA

CLE

BLK

BLK

1

CY

CLE

LIG

HTS

YEL

WH

T

BLU

BR

N

RED

BR

N

RED

BR

N

RED

(REA

R V

IEW

OF

BLK

WH

T

BLK

BLK

WH

T

(RIG

HT

ZO

NE)

43 52

9 10

42 3 5

6

12

11

7 10

(LEF

T Z

ON

E)

ELEM

ENT

PO

WER

REC

EPTA

CLE

(RIG

HT

ZO

NE)

CO

NTR

OLL

ERTE

MP

ERA

TUR

E

WH

T

BLK

(CEN

TER

ZO

NE)

CO

NTR

OLL

ERTE

MP

ERA

TUR

E

WH

T

BLK

GRN/YEL

(CEN

TER

ZO

NE)

SOLI

D S

TATE

RED

WH

T

WH

T

BR

N

RED

BR

N

RED

BR

N

YEL

RED

YEL

RED

YEL

RED

T/

C J

AC

K

WH

T

WH

T

(RIG

HT

ZO

NE)

SOLI

D S

TATE

(RIG

HT

ZO

NE)

4+3REL

AY 1

2+

(LEF

T Z

ON

E)

+3REL

AY

SOLI

D S

TATE

T/

C J

AC

K

(CEN

TER

ZO

NE)

WH

T

+34

REL

AY

21

+

T/C

JA

CK

(LEF

T Z

ON

E)

GR

N/Y

EL

WH

T

4

+1

2

10

49

2 3 5(LEF

T Z

ON

E)

CO

NTR

OLL

ERTE

MP

ERA

TUR

E

GN

D.

REL

AY

HEA

T C

ON

TRO

LG

RN

G L1L2LI

NE

1

876

11

12

1

98

16 7 8

11

12

BLU

WH

T

BLU

LIN

EFI

LTER

TER

MIN

AL

BLO

CK

WH

T

CB

1

60

WIRING DIAGRAMS

Single Set Point Controller Models, Circuit Diagram

DIA

GR

AM

CO

MP

ON

EN

T L

IST

RE

F.

NO

.

C1

CA

PA

CIT

OR

, .01

mfd

, 3K

V

CO

NT

RO

L, E

LEC

.C

N1

PIL

OT

LIG

HT

, NE

ON

, AM

BE

RD

S1

PIL

OT

LIG

HT

, NE

ON

, AM

BE

RD

S2

HE

AT

ING

ELE

ME

NT

, 144

0WH

R1

HE

AT

ING

ELE

ME

NT

, 144

0WH

R2

RE

LAY

, SO

LID

ST

AT

E, 2

5AR

Y1

RE

LAY

, SO

LID

ST

AT

E, 2

5AR

Y2

SW

ITC

H, R

OC

KE

R, L

IGH

TE

D, D

PS

TS

1S

WIT

CH

, RO

CK

ER

, DP

DT

S2

SW

ITC

H, M

ICR

O, D

PS

TS

3

DE

SC

RIP

TIO

N

HE

AT

ING

ELE

ME

NT

, 144

0WH

EA

TIN

G E

LEM

EN

T, 1

440W

HR

4H

R3

CO

NT

RO

L, E

LEC

.C

N2

CO

NT

RO

L, E

LEC

.C

N3

HE

AT

ING

ELE

ME

NT

, 144

0WH

EA

TIN

G E

LEM

EN

T, 1

440W

HR

5H

R6

RE

LAY

, SO

LID

ST

AT

E, 2

5AR

ELA

Y, M

AG

NE

TIC

, 2 P

OLE

, 50A

RY

4R

Y3

CN

3Z

ON

EC

EN

TE

RT

/C

GN

D.

LIN

E

ZO

NE

+

1011

5

S1

LEF

TT

/C

4

9

12

+(3

)

(4)

RY

1

S3

CN

1

7

6

ZO

NE

+

1011

511

10

CIR

CU

IT D

IAG

RA

M

9+

124

(3)

(4)

RY

27

6

CN

2

RIG

HT

T/C

4

9

12

+

+

RY

1

S2

5

C1 R

Y4

CN

1(6

)

(7)

+

4 321

(7)

(6)

CN

2

(7)

(6)

GN

D.

+

1 234

RY

2

HR

1

HR

2

(3)

RY

3(4)

CN

3

7

6

DS

1D

S2

DS

3

HR

4

HR

3

RY

3

+

1 234

HR

6

HR

5

DS

3P

ILO

T L

IGH

T, N

EO

N, A

MB

ER

EM

I LIN

E F

ILT

ER

C2

C2

CB

1

CB

1C

IRC

UIT

BR

EA

KE

R,

40A

61

WIRING DIAGRAMS

2 Ramp/2 Dwell Controller Models

DO

OR

SW

ITC

H C

AB

LE(R

EA

R V

IEW

)

1

44

1

WH

T

BLK

BLK

WH

T

GR

N

GN

D.

TC

+T

C-

T/C

DO

OR

SW

ITC

H P

LUG

(U

PP

ER

)

ELE

ME

NT

PO

WE

R P

LUG

ELE

ME

NT

(RE

AR

VIE

W)

4

1

T3

T2

T1

SW

ITC

HD

OO

R

NO

WH

T

WH

TC

OM

+

T/C

PLU

G

ELE

ME

NT

(L

OW

ER

)

WH

T

WH

T

WH

T

WHT

WH

T/G

RN

WH

T/G

RN

YE

L

RE

D

WH

T

T2

PLU

G

GR

N

WH

T

BLK

T/C

+

RE

D

YE

L

T1

CH

AM

BE

R

GN

D.

TC

+

T/C

TC

-

WHT

(L

OW

ER

)WH

T

WH

T

ELE

ME

NT

T3

(L

EF

T)

(Z

ON

E)

SE

CT

ION

ELE

ME

NT

(U

PP

ER

)

FU

RN

AC

E

BLK

WH

T

GR

N

ELE

ME

NT

PO

WE

R

T/C

PLU

G

PLU

G

WHT

WH

T

+

RE

D

YE

L

T1

T2

GN

D.

TC

-

T/C

TC

+

T3

ELE

ME

NT

WH

T

WH

T

(L

OW

ER

)

(U

PP

ER

)

ELE

ME

NT

FU

RN

AC

E

SE

CT

ION

CH

AM

BE

R

(R

IGH

T)

(Z

ON

E)

ELE

ME

NT

PO

WE

R P

LUG

SE

CT

ION

FU

RN

AC

EC

HA

MB

ER

(Z

ON

E)

(C

EN

TE

R)

NO

TE

S:

RE

AR

VIE

W O

F P

LUG

SS

HO

WN

, 3 P

LAC

ES

.

TC

+T

C-

T/C

TC

+T

C-

T/C

RED

YEL

RE

D

YEL

YE

L

YE

L

GR

N/Y

EL

DO

OR

SW

ITC

HJA

CK

VIE

W)

SW

ITC

HP

OW

ER

4

(RE

AR

YE

L

YE

L

RE

D

YE

L

YE

L

YE

L

(SH

OW

N U

PS

IDE

DO

WN

)

CO

NT

RO

L S

EC

TIO

N

RE

CE

PT

AC

LES

SH

OW

N)

RE

CE

PT

AC

LEE

LEM

EN

T P

OW

ER

(CE

NT

ER

ZO

NE

)

(ZO

NE

)

(RIG

HT

)

(ZO

NE

)

(CE

NT

ER

)

HE

AT

SW

ITC

H

WH

T

BLK

CA

PA

CIT

OR

(ZO

NE

)

(LE

FT

)

BLU

ELE

ME

NT

PO

WE

RR

EC

EP

TA

CLE

BLK

BLK

1

CY

CLE

LIG

HT

S

YE

L

WH

T

BLU

BR

N

RE

D

BR

N

RE

D

BR

N

RE

D(RE

AR

VIE

W O

F

BLK

WH

T

BLK

BLK

WH

T

(RIG

HT

ZO

NE

)

BLU

91 2 5 7 106

11 19 20

91 5 6 7 10

16 1711 20

WH

T

BLU

(LE

FT

ZO

NE

)

ELE

ME

NT

PO

WE

RR

EC

EP

TA

CLE

GR

N/Y

EL

(RIG

HT

ZO

NE

)

CO

NT

RO

LLE

RT

EM

PE

RA

TU

RE

WH

T

BLK

(CE

NT

ER

ZO

NE

)

CO

NT

RO

LLE

RT

EM

PE

RA

TU

RE

WH

T

BLK

GRN/YEL

(CE

NT

ER

ZO

NE

)

SO

LID

ST

AT

E

YE

L

WH

T

WH

T

BR

N

RE

D

BR

N

RE

D

BR

N

YE

L

YE

L

YE

L

RE

D

YE

L

RE

D

T/C

JA

CK

WH

T

WH

T

(RIG

HT

ZO

NE

)

SO

LID

ST

AT

E

(RIG

HT

ZO

NE

)

4+

3

RE

LAY 1

2+

(LE

FT

ZO

NE

)

+3

RE

LAY

SO

LID

ST

AT

E

T/C

JA

CK

(CE

NT

ER

ZO

NE

)

WH

T

+3

4

RE

LAY

21

+ T

/C J

AC

K

(LE

FT

ZO

NE

)

GR

N/Y

EL

WH

T

4

+1

2

20

9

11

21 5

19

6 7 10

(LE

FT

ZO

NE

)

CO

NT

RO

LLE

RT

EM

PE

RA

TU

RE

2

19

BLK

GR

N/Y

EL

GR

N/Y

EL

GN

D

WH

T

YE

L

LIN

E

GR

N

G L1L2

GN

D

FIL

TE

RLI

NE

RE

LAY

HE

AT

CO

NT

RO

L

GN

D.

CB

1

62

WIRING DIAGRAMS

2 Ramp/2 Dwell Controller Models, Circuit Diagram

DIA

GR

AM

CO

MP

ON

EN

T L

IST

RE

F.

NO

.

C1

CA

PA

CIT

OR

, .01

mfd

, 3K

V

CO

NT

RO

L, E

LEC

.C

N1

PIL

OT

LIG

HT

, NE

ON

, AM

BE

RD

S1

PIL

OT

LIG

HT

, NE

ON

, AM

BE

RD

S2

HE

AT

ING

ELE

ME

NT

, 144

0WH

R1

HE

AT

ING

ELE

ME

NT

, 144

0WH

R2

RE

LAY

, SO

LID

ST

AT

E, 2

5AR

Y1

RE

LAY

, SO

LID

ST

AT

E, 2

5AR

Y2

SW

ITC

H, R

OC

KE

R, L

IGH

TE

D, D

PS

TS

1S

WIT

CH

, RO

CK

ER

, DP

DT

S2

SW

ITC

H, M

ICR

O, D

PS

TS

3

DE

SC

RIP

TIO

N

HE

AT

ING

ELE

ME

NT

, 144

0WH

EA

TIN

G E

LEM

EN

T, 1

440W

HR

4H

R3

CO

NT

RO

L, E

LEC

.C

N2

CO

NT

RO

L, E

LEC

.C

N3

HE

AT

ING

ELE

ME

NT

, 144

0WH

EA

TIN

G E

LEM

EN

T, 1

440W

HR

5H

R6

RE

LAY

, SO

LID

ST

AT

E, 2

5AR

ELA

Y, M

AG

NE

TIC

, 2 P

OLE

, 50A

RY

4R

Y3

CN

3

ZO

NE

CE

NT

ER

T/C

ZO

NE

+

-+-

T/C

CE

NT

ER

ZO

NE

719

69

S1

+

LEF

TT

/C

10

20

5

+(3

)

(4)

RY

1

S3

CN

1

1

2Z

ON

E+

196

79

-+T

/C

CE

NT

ER

ZO

NE

76

19

CIR

CU

IT D

IAG

RA

M

20+

510

(3)

(4)

RY

21

2CN

2

-+

RIG

HT

T/C

10

20

5

+

+

RY

1

S2

9

C1 R

Y4

CN

1(2

)

(1)

+

4 321

(1)

(2)

CN

2

(1)

(2)

GN

D.

+

1 234

RY

2

HR

1

HR

2

(3)

RY

3(4)

CN

3

1

2

DS

1D

S2

DS

3

HR

4

HR

3

RY

3

+

1 234

HR

6

HR

5

16 17

PIL

OT

LIG

HT

, NE

ON

, AM

BE

RD

S3

C2

EM

I LIN

E F

ILT

ER

CB

1C

IRC

UIT

BR

EA

KE

R,

40A

GN

D.

LIN

E

CB

1C

2

63

WIRING DIAGRAMS

8 Ramp/8 Dwell Controller Models

DO

OR

SW

ITC

H C

AB

LE

(RE

AR

VIE

W)

1

44

1

WH

T

BLK

BLK

WH

T

GR

N

GN

D.

TC

+T

C-

T/C

DO

OR

SW

ITC

H P

LUG

(U

PP

ER

)

ELE

ME

NT

PO

WE

R

PLU

G

ELE

ME

NT

(RE

AR

VIE

W)

4

1

T3

T2

T1

SW

ITC

H

DO

OR

NO

WH

T

WH

TC

OM

+

T/C

PLU

G

ELE

ME

NT

(L

OW

ER

)

WH

T

WH

T

WH

T

WHT

WH

T/G

RN

WH

T/G

RN

YE

L

RE

D

WH

T

T2

PLU

G

GR

N

WH

T

BLK

T/C

+

RE

D

YE

L

T1

CH

AM

BE

R

GN

D.

TC

+

T/C

TC

-

WHT

(L

OW

ER

)WH

T

WH

T

ELE

ME

NT

T3

(L

EF

T)

(Z

ON

E)

SE

CT

ION

ELE

ME

NT

(U

PP

ER

)

FU

RN

AC

E

BLK

WH

T

GR

N

ELE

ME

NT

PO

WE

R

T/C

PLU

G

PLU

G

WHT

WH

T

+

RE

D

YE

L

T1

T2

GN

D.

TC

-

T/C

TC

+

T3

ELE

ME

NT

WH

T

WH

T

(L

OW

ER

)

(U

PP

ER

)

ELE

ME

NT

FU

RN

AC

E

SE

CT

ION

CH

AM

BE

R

(R

IGH

T)

(Z

ON

E)

(RE

AR

PO

WE

R

SW

ITC

H

SW

ITC

H

HE

AT

4

1V

IEW

)

DO

OR

SW

ITC

H

JAC

K

(CE

NT

ER

ZO

NE

)

RE

CE

PT

AC

LE

ELE

ME

NT

PO

WE

R

TE

MP

ER

AT

UR

E

CA

PA

CIT

OR

LIG

HT

S

CO

NT

RO

L S

EC

TIO

N

(SH

OW

N U

PS

IDE

DO

WN

)

CO

NT

RO

LLE

R

6 102019

7

ELE

ME

NT

PO

WE

R

CY

CLE

(RIG

HT

ZO

NE

)

RE

CE

PT

AC

LE

ELE

ME

NT

PO

WE

R

BLK

(LE

FT

ZO

NE

)

RE

CE

PT

AC

LE

BLK

TE

MP

ER

AT

UR

ET

EM

PE

RA

TU

RE

CO

NT

RO

LLE

RC

ON

TR

OLL

ER

BLK

2+

1

RE

LAY

SO

LID

ST

AT

E

+3

4

12

+

SO

LID

ST

AT

E

RE

LAY

4+

3

21

+

SO

LID

ST

AT

E

RE

LAY

+3

4

ELE

ME

NT

PO

WE

R

PLU

G

SE

CT

ION

FU

RN

AC

E

CH

AM

BE

R

(Z

ON

E)

(C

EN

TE

R)

BLK

YE

L

YE

L

YE

L

RE

D

YE

L

YE

L

(RIG

HT

ZO

NE

)(C

EN

TE

R Z

ON

E)

(LE

FT

ZO

NE

)

RE

D

BR

N

RE

D

BR

N

RE

D

BR

N

BLU

WH

T

WH

T

BLK

BLK

GR

N/Y

EL

YE

L

BR

N

RE

D

BR

N

RE

D

BR

N

WH

T

WH

T

GR

N/Y

EL

WH

T

WH

T

GR

N/Y

EL

GRN/YEL

WH

T

WH

T

WH

T

RE

D

YE

L

YE

L

RE

D

YE

L

YE

L

YE

L

(RIG

HT

ZO

NE

)(C

EN

TE

R Z

ON

E)

(LE

FT

ZO

NE

)

T/C

JA

CK

(RIG

HT

ZO

NE

)

T/C

JA

CK

(CE

NT

ER

ZO

NE

)

T/C

JA

CK

(LE

FT

ZO

NE

)

NO

TE

S:

RE

AR

VIE

W O

F P

LUG

SS

HO

WN

, 3 P

LAC

ES

.

(RE

AR

VIE

W O

F

RE

CE

PT

AC

LES

SH

OW

N)

TC

+T

C-

T/C

TC

+T

C-

T/C

RED

YEL

RE

D

YEL

YE

L

YE

L

52111

953

36

2128

1076

2019

51 2

11

33

YE

L

6

BLU

WH

T

WH

T

26 271910 18171513

25

31 18 15 13 17

1

2

3

7

RE

D

WH

T

BLU

OR

N

CA

BLE

WIR

ING

INT

ER

NA

L C

OM

MU

NIC

AT

ION

S

CO

NT

RO

LLE

R(C

EN

TE

R Z

ON

E)

CO

NN

EC

TO

R

GN

D.

9B

LU

(RIG

HT

)

(ZO

NE

)

(CE

NT

ER

)

(ZO

NE

)

(LE

FT

)

(ZO

NE

)

BLK

BLK

9

BLU

WH

T

WH

T

GR

N/Y

EL

GR

N/Y

EL

BLO

CK

TE

RM

INA

L

GN

D

YE

L

WH

T BLK

BLK

BLK

LIN

E

GR

N

G L1L2

GN

D

FIL

TE

RLI

NE

RE

LAY

HE

AT

CO

NT

RO

L

CB

1

GN

D.

648 Ramp/8 Dwell Controller Models, Circuit Diagram

S1

T/C

+

5

20

619

2

1

RY

2

DS

2H

R3

HR

4

4 321

+

GN

D.

CIR

CU

IT D

IAG

RA

M

CN

1

DIA

GR

AM

CO

MP

ON

EN

T L

IST

RE

F.

NO

.

C1

CA

PA

CIT

OR

, .01

mfd

, 3K

V

CO

NT

RO

L, E

LEC

.C

N1

PIL

OT

LIG

HT

, NE

ON

, AM

BE

RD

S1

PIL

OT

LIG

HT

, NE

ON

, AM

BE

RD

S2

HE

AT

ING

ELE

ME

NT

, 144

0WH

R1

HE

AT

ING

ELE

ME

NT

, 144

0WH

R2

RE

LAY

, SO

LID

ST

AT

E, 2

5AR

Y1

RE

LAY

, SO

LID

ST

AT

E, 2

5AR

Y2

SW

ITC

H, R

OC

KE

R, L

IGH

TE

D, D

PS

TS

1S

WIT

CH

, RO

CK

ER

, DP

DT

S2

SW

ITC

H, M

ICR

O, D

PS

TS

3

DE

SC

RIP

TIO

N

HE

AT

ING

ELE

ME

NT

, 144

0WH

EA

TIN

G E

LEM

EN

T, 1

440W

HR

4H

R3

33

10

3

CN

2

RY

4

S2

5

6

C1

S3

RY

1R

Y2

(4)

(3)

(4)

(3)

++

+

5

20

196

+2

1CN

3

(4)

RY

3 (3)

CN

2(5

)

(6)

CO

NT

RO

L, E

LEC

.C

N2

CO

NT

RO

L, E

LEC

.C

N3

HE

AT

ING

ELE

ME

NT

, 144

0WH

EA

TIN

G E

LEM

EN

T, 1

440W

HR

5H

R6

RE

LAY

, SO

LID

ST

AT

E, 2

5AR

ELA

Y, M

AG

NE

TIC

, 2 P

OLE

, 50A

RY

4R

Y3

7

1

2

T/C

RIG

HT

ZO

NE

ZO

NE

CE

NT

ER

T/C

7

+LE

FT

ZO

NE

ZO

NE

CE

NT

ER

T/C

26

25

+ - + -

T/C

CE

NT

ER

ZO

NE

+ - + -

9

3110

9

RY

1

+

(1)

(2)

CN

1

1 234

HR

2

HR

1D

S1

CN

3(2

)

(1)

DS

3

4 321

+RY

3

HR

5

HR

6

DS

3P

ILO

T L

IGH

T, N

EO

N, A

MB

ER

C2

EM

I LIN

E F

ILT

ER

GN

D.

C2

LIN

E

CB

1

CB

1C

IRC

UIT

BR

EA

KE

R,

40A

WIRING DIAGRAMS

65

Exploded Views

Bottom Furnace Section

Top Furnace Section

1

32

5

77

1

6

7

4

4

8

3

5

8

9

8

2

5

8

5

4

4

11

66

EXPLODED VIEWS

Final Assembly

Control Section

15

13

16

18

21

14

19

12

17

21

20

DETAIL A

10

See Detail A

67

Exploded View Key

Key # Part # Description1 JC793X4 End Insulation, F79600

JC795X1 End Insulation, F795002 JC793X5 End Insulation, F79600

JC795X2 End Insulation, F795003 EL793X2A Heating Element, F79600, 220/240 V (6 required)

EL793X3A Heating Element, F79600, 208 V (6 required)EL795X2A Heating Element, F79500, 220/240 V (6 required)EL795X1A Heating Element, F79500, 208 V (6 required)

4 CS793X1 Element Retaining Bracket5 BC793X5 End Bracket6 TRX183 Thermocouple Terminal Block7** TC408X1A Thermocouple8 PT793X3A End Panel9 HN480X1A Handle10 04246 Furnace Safety Switch11 04206 Terminal Block12 * Electronic Control13 SWX138 Switch14 SWX108 Switch15 PLX104 Pilot Light16 RYX34 Relay17 RYX62 Relay18 CEX205 Connector19 CEX206 Connector20 CE1083X1A Connector21 FCX89 Latch

*Electronic Control Single Set point CN71X552R/2D CN71X408R/8D CN71X56Differential CN71X58

**Thermocouple 2R/2D There are 5 thermocouples, not 38R/8D There are 5 thermocouples, not 3

68

Material Safety Data Sheet

Thermal Ceramics

Date Revised: 7/2/91

PRODUCT IDENTIFICATIONTrade Name(s): CERAFIBERGeneric Name: REFRACTORY CERAMIC FIBER INSULATION CAS #: 65997-17-3Chemical Name: ALUMINA SILICA Formula: MIXTUREManufacturer: Thermal Ceramics Telephone: (404) 796-4200Address: P.0. BOX 923, 2102 Old Savannah RoadCity: Augusta State: Georgia Zip: 30903

PRODUCT INGREDIENTS

PHYSICAL DATAAppearance and Odor: WHITE FIBER-NO ODOR.

Boiling Point: NA Evaporation Rate (NA = 1): NA

Vapor Pressure: NA Specific Gravity (water = 1 ) : 2.6

Water Solubility (%): NIL Melting Point: >3000°FVapor Density (Air= l): NA % Volatile by Volume: 0

FIRE AND EXPLOSION DATA

HEALTH HAZARDSSummary/Risks

Summary: EXPOSURE TO DUST FROM THIS PRODUCT SHOULD BE MINIMIZED. ANIMAL INHALATION AND ARTIFICIALIMPLANTATION STUDIES HAVE REPORTED THE DEVELOPMENT OF TUMORS. BASED ON PRELIMINARY RESULTS, ANOTICE OF SUBSTANTIAL RISK HAS BEEN FILED WITH THE EPA ACCORDING TO SECTION 8(e) OF THE TOXICSUBSTANCES CONTROL ACT. BASED ON ANIMAL STUDIES, IARC HAS CLASSIFIED RCF AS POSSIBLY CARCINOGENICFOR HUMANS (2B). DATA FROM HUMAN EPIDEMIOLOGICAL STUDIES IS INSUFFICIENT. THIS SUBSTANCE OR MIXTUREHAS NOT BEEN CLASSIFIED A CARCINOGEN BY NTP OR OSHA.

Medical conditions which may be aggravated: AS WITH ANY DUST, PRE-EXISTING UPPER RESPIRATORY AND LUNG DISEASESMAY BE AGGRAVATED.

Target Organ(s): LUNGS, SKIN AND EYES .Acute Health Effects: PRODUCT IS A MECHANICAL IRRITANT TO SKIN, EYES AND UPPER RESPIRATORY SYSTEM.Chronic Health Effects: EXCESSIVE EXPOSURE TO RCF DUSTS AND AFTER SERVICE FIBERS MAY CAUSE LUNG DAMAGE

(FIBROSIS). IARC STATES THERE IS SUFFICIENT EVIDENCE IN ANIMALS AND LIMITED EVIDENCE IN HUMANS TOCLASSIFY CRYSTALLINE SILICA AS A PROBABLE CARCINOGEN (2A) AND RCF AS A POSSIBLE CARCINOGEN (2B).

Primary Entry Route(s): INHALATION, SKIN AND EYE CONTACT.

Signs/Symptoms of OverexposureInhalation: IRRITATION OR SORENESS IN THROAT & NOSE. IN EXTREME EXPOSURES SOME CONGESTION MAY OCCUR.Skin Contact: TEMPORARY IRRITATION OR RASH.Skin Absorption: NAIngestion: NOT HAZARDOUS WHEN INGESTED. MAY CAUSE TEMPORARY IRRITATION TO GI TRACT.Eyes: TEMPORARY IRRITATION OR INFLAMMATION

69

MATERIAL SAFETY DATA SHEET

First Aid/Emergency ProceduresInhalation: REMOVE TO FRESH AIR. DRINK WATER TO CLEAR THROAT AND BLOW NOSE TO EVACUATE FIBERS.Skin Contact: WASH AFFECTED AREAS GENTLY WITH SOAP AND WARM WATER.Skin Absorption: NAIngestion: NAEyes: FLUSH EYES WITH COPIOUS QUANTITIES OF WATER. IF IRRITATION PERSISTS CONSULT A PHYSICIAN.

REACTIVITY DATAMATERIAL IS STABLE. HAZARDOUS POLYMERIZATION CANNOT OCCUR.Chemical Incompatibilities: HYDROFLUORIC ACIDConditions to Avoid: NONE IN DESIGNED USE.Hazardous Decomposition Products: NONE

SPILL OR LEAK PROCEDURESProcedures for Spill/Leak: VACUUM CLEAN DUST WITH EQUIPMENT FITTED WITH HEPA FILTER. IF SWEEPING IS NECESSARY

USE A DUST SUPPRESSANT.Waste Management: WASTES ARE NOT HAZARDOUS AS DEFINED BY RCRA (40 CFR PART 261 ) . COMPLY WITH FEDERAL,

STATE & LOCAL REGULATIONS. METHOD OF DISPOSAL - LANDFILL. RQ - N/A.

SPECIAL PROTECTION INFORMATIONGoggles: GOGGLES OR SAFETY GLASSES WITH SIDE SHIELDS ARE RECOMMENDED.Gloves: GLOVES ARE RECOMMENDED.Respirator: <1 F/CC, USE 3M 9900; <10 F/CC, USE MSA COMFO II WITH H FILTER; <50 F/CC, USE MSA ULTR”At”WIN H FILTER;

OR EQUIVALENTS. SEE SECTION IX-OTHER.Ventilation: USE SUFFICIENT NATURAL OR MECHANICAL VENTILATION TO KEEP DUST LEVEL TO BELOW PEL/TLV/WEG

(WORKPLACE EXPOSURE GUIDELINE) USE DUST COLLECTION WHEN TEARING OUT.Other: WEAR LOOSE FITTING, LONG SLEEVED CLOTHING. WASH EXPOSED AREAS WITH SOAP & WARM WATER AFTER

HANDLING. WASH WORK CLOTHES SEPARATELY FROM OTHER CLOTHING; RINSE WASHER THOROUGHLY.Special Considerations for repair/maintenance of contaminated equipment: CRISTOBALITE RESPIRATOR: <10X PEL, USE 3M

9900; <100X PEL, USE MSA ULTR”At”WIN H FILTER; OR EQUIV. SEE SEC IX-OTHER.

SPECIAL PRECAUTIONS*** ALWAYS SEGREGATE MATERIALS BY MAJOR HAZARD CLASS ***

THIS PRODUCT CONTAINS A CHEMICAL KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER.Storage Segregation Hazard Classes: IRRITANTSpecial Handling/Storage: KEEP MATERIAL DRY.Special Workplace Engineering Controls: ADEQUATE VENTILATION TO KEEP DUST LEVEL TO BELOW PEL/TLV/WEG (WORKPLACE

EXPOSURE GUIDELINE).Other: ADDITIONAL INFORMATION ON THE HEALTH AND SAFETY ASPECTS OF REFRACTORY CERAMIC FIBERS IS AVAILABLE.

† Copyright© 1980, National Fire Protection Assoc., Quincy, MA 02269. This reprinted material is not the complete and official position ofthe NFPA on the referenced subject, which is represented only by the standard in its entirety. MSSM/226-21:26/00030. As of the date ofpreparation of this document, the foregoing information is believed to be accurate and is provided in good faith to comply with applicablefederal and state law(s). However, no warranty or representation with respect to such information is intended or given.

MSDS/MSD3 FORM REV. 7/2/91

71

Barnstead|Thermolyne Corporation warrants that if a product manufactured byBarnstead|Thermolyne and sold by it within the continental United States or Canadaproves to be defective in material or construction, it will provide you, without charge, for aperiod of ninety (90) days, the labor, and a period of one (1) year, the parts, necessary toremedy any such defect. Outside the continental United States and Canada, the warrantyprovides, for one (1) year, the parts necessary to remedy any such defect. The warrantyperiod shall commence either six (6) months following the date the product is sold byBarnstead|Thermolyne or on the date it is purchased by the original retail consumer,whichever date occurs first.

All warranty inspections and repairs must be performed by and parts obtained from anauthorized Barnstead|Thermolyne dealer or Barnstead|Thermolyne (at its owndiscretion). Heating elements, however, because of their susceptibility to overheating andcontamination, must be returned to our factory, and if, upon inspection, it is concluded thatfailure is not due to excessive high temperature or contamination, warranty replacement willbe provided by Barnstead|Thermolyne . The name of the authorizedBarnstead|Thermolyne dealer nearest you may be obtained by calling 1-800-446-6060(319-556-2241) or writing to:

Barnstead|ThermolyneP.O. Box 797

2555 Kerper BoulevardDubuque, IA 52004-0797

USAFAX: (319) 589-0516

E-MAIL ADDRESS: [email protected]

Barnstead|Thermolyne’s sole obligation with respect to its product shall be to repair or (atits own discretion) replace the product. Under no circumstances shall it be liable forincidental or consequential damage.

THE WARRANTY STATED HEREIN IS THE SOLE WARRANTY APPLICABLE TOBarnstead|Thermolyne PRODUCTS. Barnstead|Thermolyne EXPRESSLY DISCLAIMSANY AND ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDINGWARRANTIES OF MERCHANTABILITY OR FITNESS FOR USE.

One Year Limited Warranty

72

9001ISOREGISTERED

Barnstead|Thermolyne2555 Kerper Blvd.P.O. Box 797Dubuque, IA 52004-2241Phone: 319-556-2241 800-553-0039Fax: 319-589-0516E-Mail Address: [email protected]

types f79500 & f79600 three-zone tube furnaces · the furnace controller consists of a...

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