Watlow Electric 734 User's Manual
Contents
1. Series 733 734 Customer Satisfaction EE Time Temperature Control Service Manual WATLOW Watlow Controls 1241 Bundy Blvd P O BOX 5580 Winona MN 55987 5580 Phone 507 454 5300 Fax 507 452 4507 0600 0008 0000 Rev D 10 00 November 1995 Made in the U S A Supersedes without change W733 XSMN Rev 000 This manual is a supplement to the Series 733 734 Program Manual It is for configuring servicing and calibrating your control Use this manual in conjunc tion with the Series 733 734 Program Manual and Data Communications manual Pageltem Chapter 1 3 Install and Wire the Series 733 734 3 Dimensions 3 Panel Cutout 4 How to Wire the Series 733 734 5 Power Wiring 5 Input Wiring 8 Output 1 Wiring 9 Output 2 Wiring 10 Event Input Wiring 10 Event Output Wiring 10 Alarm Wiring 11 System Wiring Examples Chapter 2 12 The Setup Mode 12 Advancing Through the Setup Mode 12 Select or Change Setup Data Within the Mode 13 Setup Parameters 16 Setup ModeTable Notes J Informational notes alert you to important details When you see a note icon look for an explanation in the margin Safety Information Boldface safety information protects both you and your equipment Please be attentive to them Here are explanations ZA The CAUTION symbol exclamation point in the wide text column alerts you to a CAUTION a safety or func2. NOTE 2 Event Inputs Event Input 1 Event Input is not Non isolated available on stan 7T3XX XXX1 XXXX dard Series 733 734 controls Consult factory for more information Figure 17 Event Input Wiring Common Event Output Wiring 4 Event Outputs Open Collector Non isolated 5mA Maximum Per Event 73XX XXX1 XXXX Customer Supplied 3 32V VDC Input i 24 260V VAC Output Solid State Relays Alarm Event 3 Figure 18 Event Output Wiring External Audible Alarm 1 12V VDC 5mA maximum optional installation Alarm Wiring Single Alarm Mechanical Relay with Contact Suppression Form A 1 Amp 73XX XXXX DXXX Figure 19 gt Alarm Wiring e Load 10 WATLOW Series 733 734 Service Manual Install amp Wire Chapter 1 System Example L1 120 L2 1 A001 0249 0001 73XX 1CA0 AXXX lal Sd Over Temp C Light 142A 36XX 1200 NC NO UL recognized safety limit control High Limit Mechanical Contactor Limit Normally Open Sensor Momentary SSR 240 10G DC1 24 240 V VAC 382 O v VDC 2 Process Sensor 120V VAC L1 L2 A001 0249 0001 O CI 4 24v 5 L 6 6 9 7 fi Series 733 73XX 1CA0 AXXX 8 0 SSR 240 10G DC1 1 1 o K IL I 74 L1 L2 1 1 L 15 Rese Series
3. Dual input requires at least one ungrounded t c See Chapter 1 of the Series 733 734 Service Manual F or process variable units are user selectable Operating ranges user selectable J Uc 32 to 1382 F or 0 to 750 C K t C 32 to 2282 F 0 to 1250 C Etc 32 to 1220 F or 0 to 660 RTD 32 to 1112 F 0 to 600 Process 500 to 3500 units Primary Output Zone 1 e Solid state Relay Form A 0 4A 120 208 240V VAC 30VA pilot duty 120 208 240V VAC opto isolated zero cross switching Off state impedance is 20K minimum with contact suppression 31M without contact suppression Electromechanical Relay Form A 1A 24 120 208 240V VAC 1 8 hp 120 240V 125VA pilot duty 24 120 208 240 VAC state impedance is 20K minimum 200m contact resistance maximum Switched DC 500 minimum load resistance 1K load 9mA minimum 22mA maximum non isolated 0 20mA 4 20mA reverse or direct into a 600 maximum load impedance non isolated 0 5V VDC 0 10V VDC reverse or direct into a 10K minimum load impedance non isolated Secondary Output Zone 2 Solid state Relay Form A 0 4A 120 208 240V VAC 30VA pilot duty 120 208 240V VAC opto isolated zero cross switching Off state imped ance is 20K minimum with contact suppression 31M without contact suppression Electromechanical Relay Form A 1A 24 120 208 34 WATLOW Series 733 734
4. NOTE In dual zone applica tions allow Zone 1 to complete before tuning Zone 2 Figure 24 Auto tuning at a Set Point of 200 F 20 WATLOW Series 733 734 Service Manual Chapter 4 Tuning Auto tuning Auto tuning applies to Zone 1 or 2 The auto tuning procedure operates on a thermal response value slow medium or fast Use the slow thermal response when your process does not reach set point too rapidly or if it usually does not exceed set point a lot A fast thermal response produces a rapid temperature change over a short period of time Once the auto tune sequence has begun the Zone 1 or 2 proportional band is set to 0 and the control goes into an ON OFF mode of control at 90 of the established set point The displayed set point remains unchanged The display alternates between _ and the current parameter Once the control learns the thermal system response it returns to a standard PID control using the PID values automatically set as a result of auto tuning Any change of the set point while in auto tune re initiates the auto tune procedure In order for the 733 734 to successfully complete auto tune the process must cross the 90 value of set point four times within 80 minutes after auto tune has started If this does not happen within the 80 minute time limit the Pb remains at 0 and the control functions in an ON OFF mode Auto tune Complete Auto tune 200 Set Point 190 ENY nce NS
5. 31M max Off state impedance 20k max 73XX XKXX XXXX 73XX XEXX XXXX 0 40 e S o o oto od eds Figure 13 AC Output 1 Wiring L1 L2 External Load DC Output Wiring Zone 1 Switched DC Open Collector 4 20mA Process Output Non isolated Non isolated Minimum load resistance 500 Load impedance 600 max 73XX XCXX XXXX 73XX XFXX XXXX 0 5V VDC Process Output Non isolated Load impedance 10K min 73XX XHXX XXXX Figure 14 DC Output 1 Wiring External Load 8 WATLOW Series 733 734 Service Manual Install amp Wire Chapter 1 Output 2 Wiring AC Output Wiring Zone 2 Solid State Relay with Mechanical Relay with Contact Suppression Contact Suppression Form A 0 4 Amps Form A 1 Amp Off state impedance 20K max Off state impedance 20K min 73XX XXBX XXXX 73XX XXDX XXXX Solid State Relay without Contact Suppression Form A 04 Amps Off state impedance 31M max 73XX XXKX XXXX Figure 15 AC Output 2 Wiring DC Output Wiring Zone 2 Switched DC Open Collector 4 20mA Process Output Non isolated Non isolated Minimum load resistance 500 Load impedance 600 max 73XX XXCX XXXX 73XX XXFX XXXX 0 5V VDC Process Output Non isolated Load impedance 10K min 73XX XXHX XXXX Figure 16 DC Output 2 Wiring Install amp Wire Chapter 1 WATLOW Series 733 734 Service Manual 9 Optional Wiring Event Input Wiring
6. J 14 Alarm Latching Selects whether the alarm output is latching or non latching This parameter only appears if your unit has alarms and AL1 no and AL2 no Range LA or nL Default nL Input Type 1 Selects the sensor input type for Zone 1 Only those input types which are compatible with your unit will appear See the model number information on the inside back cover for your type Range J K appears as H E rtd Default Jor rtd Range Low 1 Selects the low end of the operating range for Zone 1 This parameter determines the low end of the set point and alarms See the model number and specification information on the inside back cover and Table 1 on Page 14 for sensor range values Range Sensor range low to rH1 Default Low limit of sensor type Range High 1 Selects the high end of the operating range for Zone 1 This parameter determines the high end of the set point and alarms See the model number and specification information on the inside back cover and Table 1 on Page 14 for sensor range values Range Sensor range high to rL1 Default High limit of sensor type Hysteresis 1 Selects the switching hysteresis for Zone 1 when Pb1 0 ON OFF See Page 17 for the Pb1 parameter Range 1 to 99 F 1 to 55 C Default 3 F Alarm Type 1 Determines whether the alarm type for Zone 1 is process Pr deviation dE or none no A process alarm is set at an absolute temperature A deviation alarm follows
7. Service parameters Pb 1 rE 0 00 rA 0 00 Ct 5 CAL 0 AUt 0 a set point above ambient tempera ture 2 Proportional Band Adjustment Gradually increase Pb until the displayed temperature stabilizes to a constant value The process temperature may not be right on set point because the initial reset value is 0 00 repeats per minute 3 Reset Adjustment Gradually increase rE until the displayed temperature begins to oscillate or hunt Then slowly decrease rE until the temperature stabilizes again near set point 4 Cycle Time Adjustment Set Ct as required Faster cycle times sometimes achieve the best system control However if a mechanical contactor or solenoid is switching power to the load a longer cycle time may be desirable to minimize wear on the mechanical components Experiment until the cycle time is consistent with the quality of control you want Ct does not effect units with a process output 5 Rate Adjustment Increase rA to 1 00 minute Raise set point by 20 to 30 F or 11 to 17 C observe the system s approach to set point If the load tem perature overshoots set point increase rA to 2 00 minutes Next raise set point by 20 to 30 F or 11 to 17 C and watch the approach to the new set point If you increase rA too much approach to set point will be very sluggish Repeat as necessary until the system rises to the new set point without overshooting or approaching the set point too slowly 6 Calibrati
8. 17 Entering 17 Menu amp Parameters 17 19 Setup Chart 16 Entering 12 Menu amp Parameters 12 16 Specifications 34 SS Relay with amp without contact suppression Output 1 Wiring 8 Output 2 Wiring 9 Switched DC Output 1 Wiring 8 Output 2 Wiring 9 Event Output Wiring 10 System Wiring Example 11 T Thermocouple Calibration 25 amp 27 Input Wiring 6 Tuning 20 U V W Warranty 33 Wiring 4 5 Appendix Warranty The Watlow Series 733 734 is warranted to be free of defects in material and workmanship for 36 months after delivery to the first purchaser for use providing that the units have not been misapplied This excludes mechanical relays which are war ranted for 100 000 cycles Since Watlow has no control over their use and sometimes misuse we cannot guarantee against failure Watlow s obligations hereunder at Watlow s option are limited to replacement repair or refund of purchase price and parts which upon examination prove to be defective within the warranty period specified This warranty does not apply to damage resulting from transportation alteration misuse or abuse Watlow Controls Watlow Controls is a division of Watlow Electric Mfg Co St Louis MO a manufacturer of indus trial electric heating products since 1922 Watlow begins with a full set of specifications and com pletes an industrial product that is manufactured totally in house in the U S A Wa
9. AL2 dE 0 to 999 F 999 F Hardware is present amp 0 to 555 C 0 to 999 Units AL2 no If AL2 Pr A2LO to rH2 rH2 CAL2 99 to 99 F 55 to 55 99 to 99Units 0 Hardware is present 16 WATLOW Series 733 734 Service Manual Setup Mode Chapter 2 Service Chapter 3 The Service Mode Enter the Service mode by pressing the key sequence illustrated below The display shows the parameter Move through the Service mode by pressing the TIME key Use the UP DOWN 9 keys to select data After 1 minute without key activa tions the Series 733 734 reverts to the Operation mode Parameter may not appear depending on control configuration Figure 23 Service Mode Auto tune 2 Key Flow Auto tune 1 Proportional Band Reset 1 Rate 1 Cycle time 1 Proportional band 2 Reset 2 Rate 2 Cycle time 2 Maximum steps Loop tail check Melt cycle 00 00 Operation Ment Service Mode Chapter 3 WATLOW Series 733 734 Service Manual 17 Service Display alternates between parameter and programmed data AUt1 0 AUt2 0 Pb1 25 0 00 rA1 0 00 Ct1 5 Pb2 25 rE2 0 00 rA2 0 00 18 Service Parameters Auto tune Zone 1 Initiates auto tune for Zone 1 For more information on tun
10. EEC Low Voltage Directive EN 60730 1 1993 Automatic electrical controls for household and similar use Part 1 General requirements Winona Minnesota USA Place of Issue Name of Authorized Representative October 26 1995 Date of Issue Title of Authorized Representative flama Dinom W73X ECEN 0000 Rev A00 gnature of Authorized Representative Appendix WATLOW Series 733 734 Program Manual 17 Appendix WATLOW Series 733 734 Service Manual 37 eries ervice Manua ppendix 38 WATLOW Series 733 734 Service M Appendix WATLOW Series 733 734 Service Manual 39 Watlow Series 733 734 Service Manual Watlow Controls 1241 Bundy Blvd P O Box 5580 Winona MN 55987 5580 507 454 5300 Fax 507 452 4507
11. F 0 to 555 C 0 to 999 Units Default 999 F If AL2 Pr Range rL2 to A2HI Default rL2 Alarm 2 High Represents the high process alarm or high deviation alarm for Zone 2 This parameter only appears if you have a dual zone control alarms and AL2 no If AL2 dE Range 0 to 999 F 0 to 555 C 0 to 999 Units Default 999 F If AL2 Pr Range A2LO to rH2 Default rH2 Calibration Offset 2 Adds or subtracts degrees from the Zone 2 input signal This parameter only appears if you have a dual zone control Range 99 to 99 F 55 to 55 C 99 to 99 Units Default 0 Parameters that appear after CAL2 are related to data communications For more informaton see How to Use Data Communications with the Watlow Series 733 734 Input Type Sensor Range Low Sensor Range High J 32 F 0 C 1382 F 750 C K appears as H 32 F 0 C 2282 F 1250 C E 32 FJ0 C 1220 F 660 C rtd 19 32 0 1112 F 600 C 0 5 or 010 VDC 500 3500 020 or 420 mA 500 3500 Setup Mode Chapter 2 WATLOW Series 733 734 Service Manual rL2 32 rH2 1382 HYS2 3 AL2 Pr A2LO 32 A2HI 1382 CAL2 0 Table 1 Input Ranges 15 Table 2 Setup Mode Parameters and Descriptions Setup Mode Use this page as a master copy for your Series 733 734 Setup mode pa
12. Press the Time key 8 the parameter is displayed 4 Press the Up key ie once and 33 will appear Press the Time key a 5 The Series 733 734 will beep and advance to the parameter This procedure is only to be used to restore calibration It is not meant to default any other values 24 WATLOW Series 733 734 Service Manual Calibration Chapter 5 Calibration Thermocouple Field Calibration Procedure Single amp Dual Thermocouple Only For model s 73XX 1 XXX XXXX 73XX 4XXX XXXX Equipment Required Type J Reference Compensator with reference junction at 32 F 0 C OR Type J Thermocouple Calibrator set at 32 F 0 C Precision millivolt source 0 50mV min range 0 01mV resolution Two millivolt sources and two compensators OR two thermocouple calibrators are required for dual zone controls Setup And Calibration E 1 Connect the AC line voltage L1 and L2 to the proper terminals 2 For Zone 1 connect the millivolt source to Terminal 2 Positive and Terminal 3 Negative on the Series 733 734 terminal strip Use regular 20 24 gauge wire For Zone 2 connect the millivolt source to Terminal 5 Positive and Terminal 6 Negative on the Series 733 734 terminal strip Use regular 20 24 gauge wire 3 Apply power to the unit and allow it to warm up for 15 minutes After warm up put the unit in the CAL menu See the beginning of this chapter 4 Atthe CALy parameter select ALL At the InLO prompt enter 0 00 mV f
13. Service Manual 240V 1 8 hp 120 240V VAC 125VA pilot duty 24 120 208 240V VAC Off state impedance is 20K minimum 200m contact resistance maximum Switched DC 500 minimum load resistance 1K load minimum 22mA maximum non isolated 0 20mA 4 20mA reverse or direct into a 600 maximum load impedance non isolated 0 5V VDC 0 10V VDC reverse or direct into a 10K minimum load impedance non isolated Alarms Electromechanical Relay Form A 1A 24 120 208 240 VAC 1 8 hp 120 240V 125VA pilot duty 24 120 208 240V VAC Off state impedance is 20K minimum 200m contact resis tance maximum Latching or non latching Process or deviation Separate high and low values Alarm silencing inhibit on power up for alarm Event Outputs Switched DC non isolated 5V VDC 5mA maximum Accuracy Calibration Accuracy amp Sensor Conformity 0 1 of span 1LSD 77 F 5 F 25 C 3 C minimum Accuracy Span Normally 1000 minimum span Temperature Stability 0 2 F F 0 2 C C change in ambient Voltage Stability 0 0196 of span of rated line voltage Communications Serial data communications EIA TIA 422A or EIA TIA 423A EIA TIA 232C compatible or EIA TIA 485 ANSI X3 28 protocol or XON XOFF protocol solated Agency Approvals UL 873 File E43684 e CSA Certified File LR30586 C22 2 Select m
14. Table 1 below for sensor range values 0 0VDC or 4mA represent Range Low rL for process inputs and outputs The process input is linearly scaled between rL and rH This parameter only appears if you have a dual zone control Range Sensor range low to rH2 Default Low limit of sensor type Range High 2 Selects the high end of the operating range for Zone 2 This parameter determines the high end of the process input set point and alarms 5 0VDC 10 0VDC or 20mA represent Range High rH2 for process inputs and outputs The process input is linearly scaled between rL and rH This parameter only appears if you have a dual zone control Range Sensor range high to rL2 Default High limit of sensor type Hysteresis 2 Selects the switching hysteresis for Zone 2 when Pb2 0 ON OFF See Page 17 for the Pb2 parameter This parameter only appears if you have a dual zone control Range 1 to 99 F 1 to 55 C 1 to 99 Units Default 3 F Alarm Type 2 Determines whether the alarm type for Zone 2 is process Pr deviation dE or none no A process alarm is set at an absolute temperature A deviation alarm follows or tracks the set point This parameter only appears if you have a dual zone control and has alarms Range Pr dE no Default Pr Alarm 2 Low Represents the low process alarm or low deviation alarm for Zone 2 This parameter only appears if you have a dual zone control alarms and AL2 no If AL2 dE Range 0 to 999
15. and compare your model number to those shown here and also the model number breakdown on the inside back cover of this manual When you apply power without sensor inputs on the terminal strip the Series 733 734 display alternates parameter data and Er07 at a 3 second rate This error indicates an open sensor or A D error Remove power to the control and connect the sensor properly All wiring and fusing must conform to the National Electric Code and to any locally applicable codes as well Use Figure 6 as a location reference when wiring your unit 9 pin Event Input Output Connector Input Communications Connector gt 4 WATLOW Series 733 734 Service Manual Install amp Wire Chapter 1 Power Wiring Figure 7 24V VAC Power Wiring O O 2 EAC 4 2 O O O OTOI e 9 XV i WARNING L2 To avoid potential Fuse 24 V VAC electric shock use National Electric Code NEC safety practices when wiring and connect ing this unit to a power source and to iri electrical sensors or Input Wiring peripheral devices L1 Use this wiring connector as a reference for terminal orientation Each indi vidual wiring breakdown will only show the terminals used This connector only applies to input wiring and communications wiring Figure 8 Input Wiring Con OOOOOOOOO0000 nector Ly 4 zs 10i i2 N CAUTION Input power limited to 15 watts maxi
16. bee Se sro 2 Temp 100 Set Point Time To start auto tuning 1 Enter the Service mode by pressing the key sequence P3 p D M appears in the display To auto tune Zone 2 press the Time key and appears Tuning Chapter 4 2 Select a thermal response value using the UP DOWN keys 1 slow 2 dium and 3 fast A thermal response value of 2 satisfactorily tunes most thermal systems 3 When tuning is complete the display returns to its previous state and AUtX reverts to 0 The 733 734 installed appropriate PID tuning parameters and saved them in the non volatile memory If a mechanical relay or contactor is switching power to the load a longer cycle time may be desirable to minimize wear on the mechanical components Typical life of a mechani cal relay is 100 000 cycles at rated load To abort auto tuning the operator must reset the AUtX parameter to 0 or cycle power off and on or enter the Calibration mode In all cases aborting auto tune restores all values to those previous to auto tuning Manual Tuning For optimum control performance tune the Series 733 734 to your thermal system The tuning settings here are for a broad spectrum of applications your system may have somewhat different requirements NOTE This is a slow procedure taking from minutes to hours to obtain optimum values a NOTE 1 Apply power to the Series 733 734 and enter a set point Begin with these Tune each zone at
17. depends on the system temperature Warm Start Start up condition where all program information is remembered by the instrument s memory back up protection WatCurve Feature that automatically re calcu lates and adjusts a menu cooking time as a result of a disturbance usually opening the oven door WatCurve is a Watlow innovation Zero switching Action that provides output switch ing only at the zero voltage crossing points of the AC line WATLOW Series 733 734 Service Manual 31 Index A Advancing Through Setup 12 Alarm Parameters 14 16 Wiring 10 Appendix 30 Auto tuning 20 c Calibration 22 29 Changing Setup Data 12 D DC Output 1 Wiring 8 DC Output 2 Wiring 9 Default Parameters Service 19 Table 3 Setup 16 Table 2 Dimensions 3 E Event Input Wiring 10 Event Output Wiring 10 G Glossary 30 H I Hysteresis 14 8 15 Input Chart 15 Wiring 4 7 Installation 3 L Line Voltage 5 M Mechanical Relay 1 Amp Output 1 Wiring 8 Output 2 Wiring 9 Alarm Wiring 10 Model Number 35 Mounting 3 0 Output 1 Wiring 8 Output 2 Wiring 9 32 WATLOW Series 733 734 Service Manual P Panel Cutout 3 Power Wiring 5 Process Calibration 28 29 Input Wiring 4 7 Output 1 8 Output 2 9 Proportional Band 18 Q Returns 33 RTD Calibration 26 Input Wiring 6 S Selecting Setup Data 12 Sensor Calibration 25 Wiring 6 Service Chart
18. ll Output 1 Type Solid state relay with RC suppression form A 0 4A Switched DC open collector non isolated C D Mechanical relay form A 1A with suppression Mechanical relay form A 1A without suppression F Process 4 20mA non isolated H Process 0 5V VDC non isolated Solid state relay without RC suppression form A 0 4A Output 2 Type None _ Solid state relay with RC suppression form A 0 4A Switched DC open collector non isolated D Mechanical relay form A 1A with suppression Mechanical relay form A 1A without suppression F Process 4 20mA non isolated H Process 0 5V VDC non isolated Solid state relay without RC suppression form A 0 4A Event Inputs Outputs 0 None 1 4AEventoutputs switched DC non isolated custom only Alarm None D Single mechanical relay form A 1A with suppression Communications Isolated None EIA TIA 422 or EIA TIA 423 D EIA TIA 485 Options AA Standard Single Display Power Supply Power Connector and Event Input Output Accessory Kits Order separately here Part No Description 001 0249 0001 120V VAC 24V VAC stepdown transformer Class 2 quick connect terminals included A001 0249 0002 208 240V VAC 24V VAC stepdown transformer Class 2 quick connect terminals included A001 0250 0012 Power input connector kit 12 p
19. maximum number of steps allowed in a menu StP Range 1to3 Default 3 3 Loop Fail Check This parameter checks for an open or shorted sensor and LooP enables the error code function This parameter only functions in the proportional control mode Pb1 ON OFF OFF Range On or OFF Default OFF Melt Cycle Enable or disables the melt cycle function When enabled and the nnS process value is less than 212 F 100 C the corresponding zone output will go to a percent power duty cycle OFF Range On or OFF Default OFF Service Mode Table 3 Service Mode Parameters and Descriptions Use this page as a master copy for your Series 733 734 Service mode parameters Do not enter any values here make photocopies instead Parameter Value Range Factory Default Appears If AUt1 0 3 0 AUt2 0 3 0 Hardware is present Pb1 to 999 F Oto 555 C 25 F rE1 0 00 to 9 99 repeats minute 0 00 Pbi 0 rA1 0 00 to 9 99 minutes 0 00 Pbi 0 Cti 1 to 60 seconds 5 Pbi 0 Pb2 to 999 F 0 555 C 0 to 999 Units 25 F Hardware is present rE2 0 00 to 9 99 repeats minute 0 00 Hardware is present Pb2 0 rA2 0 00 to 9 99 minutes 0 00 Hardware is present Pb2 0 Ct2 1 to 60 seconds 5 Hardware is present Pb2 0 StP 1 to3 3 LooP On or OFF OFF nnS On or OFF OFF Service Mode Chapter 3 WATLOW Series 733 734 Service Manual 19 NOTE An X applies to either Zone 1 or Zone 2 aj
20. 142 2 e 142A 36XX 1200 COM UL recognized safety limit control 17 TC d 3 18 TC Ca BL re L 39 1 20 o NR fa zi P 2 Install amp Wire Chapter 1 Hi Temp Light Figure 20 System Wiring Example Figure 21 Series 733 734 Ladder Diagram Example WATLOW Series 733 734 Service Manual 11 Figure 22 Setup Mode Key Flow NOTE Changing the C_F InP_ tS rL_ rH_ parameters will default all Chapter 2 The Setup Mode Use the key sequence below to enter the Setup Mode Advancing Through The Setup Mode Press the TIME key Select or Change Setup Data Within The Mode Use the UP DOWN keys M After 1 minute with no key activactions the Series 733 734 reverts to the Operation mode Celsius Fahrenheii Guard bana RTD calibration curve Temperature WatCurve Menu time seleci Alarm silence Latching for alarm Zone 1 input type Zone 1 range lo Zone 1 range hig menus Zone 1 hysteresis Zone 1 alarm type Zone 1 alarm lov Zone 1 alarm hig 00 00 12 WATLOW Series 733 734 Service Manual Parameter may not appear depending on control configuration Only appears if your unit has communications See the Series 733 734 data communications manual for more information Zone 1 calibration offse Zone 2 input type Zone 2 range lo Zone 2 range hig Zone 2 hysteresis Zone 2 alar
21. Series 733 734 Service Manual Calibration Chapter 5 Thermocouple Process Input Field Calibration Procedure T C Process Input For model 73XX 6XXXX XXXX Equipment Needed Type J Reference Compensator with reference junction at 32 F 0 C OR Type J Thermocouple Calibrator set at 32 F 0 C Precision millivolt source 0 50mV min range 0 01mV resolution Precision voltage source 0 10 volt minimum range with 0 001 volt resolution Precision current source 0 20mA minimum range with 0 001 volt resolution Setup And Calibration a 1 2 42 At the CALy parameter select ALL At the InLO prompt enter 0 00 mV from the Calibration Chapter 5 Connect the AC line voltage L1 and L2 to the proper terminals For Zone 1 connect the millivolt source to Terminal 2 Positive and Terminal 3 Negative on the Series 733 734 terminal strip Use regular 20 24 gauge wire For Zone 2 connect the voltage source to Terminal 5 Positive and Terminal 6 Negative on the Series 733 734 terminal strip Use regular 20 24 gauge wire Apply power to the unit and allow it to warm up for 15 minutes After warm up put the unit in the CAL menu See the beginning of this chapter millivolt source to the control for each zone Allow at least 10 seconds to stabilize Press the Tlme key At the InHl prompt enter 50 0mV from the millivolt source for Zone 1 For Zone 2 enter 10 00V from the voltage source Allow at least 10 seconds to stabi
22. Set point Intended value of the process variable Shelf Timing Convection ovens typically have more than one shelf Each shelf can have a separate timer for food added at different times Slow Start Fast Start A feature in cooking equip ment that provides an option for a one hour ramp to set point temperature reduces power demands Split Vat Fryer Split vat fryers have two side by side fryer vats same piece of equipment that can run at different times and temperature for different recipes Steamer Chamber that uses steam to cook foods for a prescribed period of time Switching sensitivity In ON OFF control the temperature change necessary to change the output from full ON to full OFF Thermal system A regulated environment consist ing of a heat source heat transfer medium sensing device and a process variable control instrument Thermocouple Temperature sensing device that is constructed of two dissimilar metals wherein a measurable predictable voltage is generated corre sponding to temperature Thermocouple break protection Fail safe opera tion that assures output shutdown upon an open thermocouple condition Time Proportioning Control Action which varies the amount of ON time when close to the set point i e in the proportional band This variance is proportional to the difference between the set point and the actual process temperature In other words the amount of time the output relay is energized
23. cade resistance box with 0 01 resolution For dual zone units two decade boxes are reqiured Before calibration on an installed control make sure all data and param 1 eters are docu mented See Setup 2 and Service Tables Pages16 and 19 Always press the Time key to advance to the next eter before ing the calibration 5 equipment 26 param chang Setup And Calibration a Connect the AC line voltage L1 and L2 to the proper terminals Connect the decade resistance box to Terminal 1 2 and 3 for Zone 1 For Zone 2 units connect the decade resistance box to Terminal 4 5 6 on the terminal strip Use regular 20 24 gauge wire of the same length and type Apply power to the unit and allow it to warm up for 15 minutes After warm up put the unit in the Calibration mode See the beginning of this chapter At the CALy parameter select ALL Press the Time key At the InLO prompt set the decade resistance box to 100 0 Allow at least 10 seconds to stabilize Press the Time key At the InHI prompt set the decade resistance box to 317 33 Allow at least 10 seconds to stabilize Press the Time key To conclude the RTD calibration press the Time key to advance through the Calibration mode To continue calibrating your outputs press the Time key once The unit will leave the Calibration mode if 1 minute passes between key activations and retains all changed values WATLOW
24. d stock controls and accessories 5 If the unit is unrepairable it will be returned to you with a letter of explanation Repair costs will not exceed 50 percent of the original cost Shipping Claims When you receive your Watlow control examine the package for any signs of external damage it may have sustained enroute If there is apparent damage either outside the box or to its contents make a claim with the shipper immediately Save the original shipping carton and packing material WATLOW Series 733 734 Service Manual 33 Specifications Control Mode Single or dual input single or dual output single alarm EIA TIA 422A EIA TIA 423A or EIA TIA 485 data communications ON OFF Determined by the HYSX parameter for Outputs 1 and 2 PID Parameters Proportional band 0 to 999 F 0 to 555 C 0 to 999 units Reset 0 00 to 9 99 repeats per minute Rate 0 00 to 9 99 minutes Cycle time 1 to 60 seconds Operator Interface Membrane front panel Single four digit 0 56 14 mm LED displays TIME TEMPERATURE UP DOWN amp 1 12 menu keys Input Thermocouple RTD and electrical process input Automatic cold junction compensation for thermocouple RTD input 2 or 3 wire platinum 100 9 0 C solfware selectable JIS curve 3916 0 003916 or DIN curve 3850 0 003850 Sensor break protection de energizes control outputs to protect system Grounded or ungrounded sensors
25. e Ot2L and Ot2H parameters for Zone 2 Zone 1 4 20mA Output Field Calibration Procedure For model T3XX XFXX XXXX T3XX XXFX XXXX T3XX XFFX XXXX Equipment Required 300 1 2 watt 10 resistor 4 1 2 digit Digital Multimeter Setup And Calibration E 1 Connect the AC line voltage L1 and L2 to the proper terminals of the 733 734 2 Connect the multimeter in series with the 300 resistor to Output connector 2 Negative and 3 Positive for Zone 1 3 Apply power to the unit and allow it to warm up for 15 minutes After warm up put the unit in the Calibration mode See the beginning of this chapter At the CALy parameter select OUt Press the Time key 4 Atthe Ot1L prompt the multimeter should read approximately 4mA Allow at least 10 seconds to stabilize 5 Use the Up Down keys reverse acting to adjust the reading on the multimeter for 3 85mA 0 10mA Press the Time key 6 Atthe Ot1H prompt the multimeter should read approximately 20mA Allow at least 10 seconds to stabilize 7 Use the Up Down keys reverse acting to adjust the reading on the multimeter for 20 15mA 0 10 mA 8 For dual 4 20mA output control connect the multimeter in series with the 300 resistor to Output connector 4 Negative and 1 Positive Use regular 20 24 gauge wire Repeat steps 4 through 7 using the Ot2L and Ot2H prompts 28 WATLOW Series 733 734 Service Manual Calibration Chapter 5 0 5V Output The calibration procedure for Zone 1 a
26. es to 0 5VDC and 4 20mA outputs only This parameter Ot2L only appears if you have a dual zone control 4 20mA Output High Zone 2 Represents the process output high current calibration point for Zone 2 Applies to 0 5VDC and 4 20mA outputs only This parameter only appears if you have a dual zone unit Ot2H Calibration Chapter 5 WATLOW Series 733 734 Service Manual 23 Calibration rSt LgOt L HEy dISP Restore Restores factory calibration parameters See below for more informa tion Logic Output Test Used to test all the control and logic outputs 0 Alloutputs OFF 1 Output 1 ON 2 Output 2 ON 3 Alarm ON 4 Event 1 ON 5 Event 2 ON 6 Event 3 ON 7 Event 4 ON 8 Audible output ON Logic Inputs This parameter reads all the board option jumpers and the event inputs Factory use only Keyboard Used to read all the keys in hexadecimal Display Test Performs a display test A sequence of characters will move across the seven segment displays and LED s This parameter will continue until you advance Restoring Factory Calibration The rSt parameter restores the factory calibration values to the Series 733 734 If you calibrate your control incorrectly you have the option to default to the original values Once you leave the CAL menu the values are entered 1 Enter the Calibration mode by using the key sequence PJ E2 2 BB 09 2 appears Press the Up key a until the parameter appears 3
27. in connector assembly wire not included A001 0250 0009 Event input output connector kit 9 pin connector assembly wire not included Appendix WATLOW Series 733 734 Service Manual 35 Declaration of Conformity WATLOW CONTROLS 124 1 Bundy Boulevard Winona Minnesota 55987 USA Declares that the following product Designation Series 733 734 Model Number 733A 4BB 1 AAAG Classification Electronic Incorporated Class temperature controller Type 2C action for use in light industrial environment Rated Voltage 24V VAC Rated Current 0 250A Rated Frequency 50 60 Hz Maximum Power Input 15 Watts Meets the essential requirements of the following European Union Directive s using the relevant section s of the normalized standards and related documents shown 89 336 EEC Electromagnetic Compatibility Directive EN 50082 1 1992 EMC Generic immunity standard Part 1 Residential commercial and light industry TEC 801 3 1984 Radiatedimmunity IEC 801 5 199 Surgeimmunity EN 50082 2 1995 Generic immunity standard Part 2 Industrial environment EN 6 1000 4 2 1995 Electrostaticdischarge EN 6 1000 4 4 1995 Electrical fast transients 50141 1993 Conductedimmunity EN 50081 2 1994 EMC Generic emission standard Part 2 Industrial environment EN 55011 1991 Limits and methods of measurement of radio disturbance characteristics of industrial scientific and medical radio frequency equipment Class B 73 23
28. ing see Chapter 4 Page 19 Range 0 off 1 slow 2 medium 3 fast Default 0 Auto tune Zone 2 Initiates auto tune for Zone 2 For more information on tuning see Chapter 4 Page 19 Range 0 off 1 slow 2 medium 3 fast Default 0 Proportional Band 1 A proportional band expressed in degrees F or C within which a controller proportioning function is active for Zone 1 When Pb1 0 it functions as an ON OFF control The switching differential is then determined by the HYS1 parameter in the Setup mode See Page 15 Range 0 to 999 F 0 to 555 C Default 25 F Reset 1 A reset integral control action for Zone 1 automatically eliminates offset or droop between set point and actual process temperature in a proportional control This parameter only appears if Pb1 0 Range 0 00 to 9 99 repeats minute Default 0 00 Rate 1 The rate derivative function for Zone 1 which affects the speed or rate at which the process temperature approaches the set point to minimize overshoot and or undershoot The rate is determined by how fast the error is changing This parameter only appears if Pb1 0 Range 0 00 to 9 99 minutes Default 0 00 Cycle Time 1 Expressed in seconds time for a controller to complete one ON OFF cycle for Zone 1 Time between successive turn ons This parameter only appears if Pb1 0 Range 1 to 60 seconds Default 5 Proportional Band 2 A proportional band expressed in degrees or process units within
29. l are welcome please send them to Technical Writer Watlow Controls 1241 Blvd Box 5580 Winona MN 55987 5580 or phone 507 454 5300 The Watlow Series 733 734 Service Manual and integral software are copyrighted by Watlow Winona Inc 1995 with all rights reserved Install amp Wire Chapter 1 Chapter 1 Install and Wire the Series 733 734 Front panel mounting for ease of installation and service 7 Figure 1 m Series 733 and 734 1 975 I Dimensions 50 mm J L 10 625 270 mm 10 625 270 6 EJ Series 733 Series 734 10 13 257 mm 9 78 lt 248 mm gt La R 0 125 3 3 13 80 s Figure 2 Panel Cutout P Panel Cutout 70 mm Use four 6 32 screws 0 27 Dia gt with press in nuts 7 mm customer supplied 1 Make a panel cutout per the dimensions given above 2 NOTE 2 Drill four 0 265 7mm diameter holes per the dimensions given above For Series 734 See Figure 2 orientation verti cal rotate the panel cutout 90 3 Mount the Series 733 or 734 with four 46 32 screws using press in nuts weld nuts or equivalent Install amp Wire Chapter 1 WATLOW Series 733 734 Service Manual 3 Figure 6 Series 733 734 Rear View How to Wire the Series 733 734 The Series 733 734 wiring is illustrated by model number option Check the terminal designation sticker on the control
30. lize Press the Time key At the prompt remove the voltage source from Zone 2 Connect the current source to Terminal 6 Positive and Terminal 4 Negative Enter 20 00mA from the current source Allow at least 10 seconds to stabilize Press the Time key At the tc prompt disconnect the millivolt source and connect the reference compensator or t c calibrator to Terminal 2 Positive and Terminal 3 Negative for Zone 1 If using a compensator turn on and short the input wires If using J calibrator set to simulate 32 F 0 C Allow 10 seconds for the control to stabilize To conclude the t c calibration press the Time key to advance through the Calibration mode To continue calibrating your outputs press the Time key once The unit will leave the Calibration mode if 1 minute passes between key activations and retains all changed values WATLOW Series 733 734 Service Manual Before calibration on an installed control make sure all data and param eters are documented See Setup and Service Tables Pages 16 and 19 NOTE Always press the Time key to advance to the next param eter before chang ing the calibration equipment 27 4 20mA Output NOTE Before calibration on an installed control make sure all data and para meters are docu mented See Setup and Service Tables Pages 16 and 19 The calibration procedure for Zone 1 and Zone 2 are the same except use th
31. m type Zone 2 alarm lov Zone 2 alarm hig Zone 2 calibration offse Baud rate Data bits and parity Protocol type Address Operation Ment Setup Mode Chapter 2 Celsius Fahrenheit Selects the units of temperature measurement Range ForC Default F Guard Band Determines the process operating window deviation that both Zone 1 amp 2 must be within before a menu is allowed to run If you are within the guard band the READY LED is on and a menu can be run It you are out of the guard band the READY LED is OFF and the menu will not run Range 1 to 4000 F 2222 C Default 4000 F 2222 C RTD Calibration Curve Selects the RTD calibration curve for RTD inputs Appears if InP1 rtd for Zone 1 or InP2 rtd for Zone 2 This parameter only appears if you have a unit with RTD input JIS 0 003916 C DIN 0 003850 C Range dinor JIS Default din Temperature Compensation WatCurve Automatically re calculates and adjusts a menu cooking time as a result of a disturbance such as opening the oven door WatCurve is a Watlow innovation Enabled when tcnP On Default OFF Range On or OFF WatCurve 3 Minutes Time 1 325 F 163 C Temperature Time In this example a process is running at 325 F 163 C A basket of french fries is dropped into the oil which dropped the process temperature to 240 F 116 C The fries normally take 3 minutes to c
32. mum compo nents are rated for a maximum of 15 watts Install amp Wire Chapter 1 WATLOW Series 733 734 Service Manual 5 Input Wiring Dual zone thermo couple units require at least one un grounded thermocouple Figure 9 Thermocouple Wiring Figure 10 2 or 3 Wire RTD Wiring Thermocouple Input 73XX 1XXX XXXX 73XX 4XXX XXXX 73XX 6XXX XXXX Zone 1 RTD Input 73XX 2XXX XXXX 73XX 5XXX XXXX Zone 1 3 Wire RTD 2 Wire RTD 6 WATLOW Series 733 734 Service Manual B Dual Zone Only 73XX 4XXX XXXX Zone 2 Dual Zone Only 73XX 5XXX XXXX Zone 2 3 Wire RTD 2 Wire RTD Install amp Wire Chapter 1 Input Wiring 0 5VDC or 0 10VDC Process Input Model 73XX 6XXX XXXX Dual Zone Only Zone 2 Figure 11 0 5VDC or 0 10VDC Process Input 4 Wiring 0 20mA or 4 20mA Process Input Model 73XX 6XXX XXXX Dual Zone Only Zone 2 Figure 12 0 20mA or 4 20mA Process Input Wiring Install amp Wire Chapter 1 WATLOW Series 733 734 Service Manual 7 Output 1 Wiring AC Output Wiring Zone 1 Solid State Relay with Mechanical Relay with Contact Suppression Contact Suppression Form A 0 4 Amps Form A 1 Amp Off state impedance 20K max Off state impedance 20K min 73XX XBXX XXXX 73XX XDXX XXXX Solid State Relay without Solid State Relay without Contact Suppression Contact Suppression Form A 0 4Amps Form A 1 Amp Off state impedance
33. nd Zone 2 are the same except use the Ot2L and Ot2H parameters for Zone 2 Zone 1 0 5V VDC Output Field Calibration Procedure For model s T3XX XHXX XXXX T3XX XXHX XXXX T3XX XHHX XXXX Equipment Required 20K 1 4 watt 10 resistor 4 1 2 digit Digital Multimeter Setup And Calibration 1 Connect the AC line voltage L1 and L2 to the proper terminals of the 733 734 JD 2 Connect the multimeter across the 20K resistor to Output connector 2 NOTE Negative and 3 Positive for Zone 1 Before calibration on an installed 3 Apply power to the unit and allow it to warm up for 15 minutes After warm control make sure all data and para meters are docu mented See Setup and Service Tables 4 Atthe Ot1L prompt the multimeter should read approximately OV Allow at Pages 16 and 19 least 10 seconds to stabilize up put the unit in the Calibration mode See the beginning of this chapter At the CALy parameter select OUt Press the Time key 5 Use the Up Down keys reverse acting to adjust the reading on the multimeter for 0 2 0 1V Press the Time key 6 Atthe Ot1H prompt the multimeter should read approximately 5V Allow at least 10 seconds to stabilize 7 Use the Up Down keys reverse acting to adjust the reading on the multimeter for 5 2V 0 1V 8 For dual 0 5V output control connect the multimeter across the 20K resistor to Output connector 4 Negative and 1 Positive Use regular 20 24 gauge wi
34. o Form A amp Form B above for more information Fryer Fryers cook foods in hot oil Griddle Flat cooking surface for cooking foods May be one sided or have a top plate that is lowered to cook food from both sides simultaneously Guard Band A feature on a cooking control that creates a temperature window around set point where you cannot start a menu A guard band prevents undercooking or overcooking Holding Cabinets Cabinets to keep foods warm and moist after they are cooked Hysteresis In ON OFF control the temperature change necessary to change the output from full OFF to full ON again Hunting Oscillation or fluctuation of process temperature about the set point Idle and Idle Exit A feature in a restaurant fryer for slow use periods to run fryers at a lower temperature thus saving cooking oil and energy Input Process variable information being supplied to the instrument Appendix Integral Control action that automatically eliminates offset or droop between set point and actual process temperature Also reset Isolation Electrical separation of sensor or other device from high voltage circuitry Allows for applica tion of grounded or ungrounded sensing element JIS Japanese Industrial Standards Also Japanese Industrial Standards Committee JISC Establishes standards on equipment and components Melt Cycle A fryer feature for melting congealed oil The control will duty cycle power
35. odels CE approved Consult factory for details Electronic Incorporated Class III Control Type 2 action Connectors Compression type screw terminals and universal Mate n Lok Power e 24 VAC 10 15 50to 60 Hz 3 Consumption 6 10VA For CE approved models input power limited to 15 watts maximum All components are rated for a maximum of 15 watts Operating Environment e 32 to 176F 0 to 80 to 90 RH non condensing Dimensions 7 horizontal models Height 3 28 83 mm Width 10 66 271mm Depth 2 00 51 mm 734 vertical models Height 10 66 271mm Width 3 28 83 mm Depth 2 00 51 mm Appendix Model Number 73_A ____ __AA Tar WT E 733 734 One or two channel microprocessor based time and temperature control 24V VAC power input Order power supply and connector kit s separately below Display Orientation 3 Horizontal 4 Vertical Display Location Integral local Input Type Single thermocouple type J K E Single RTD 1 curve selectable Dual thermocouple type J E Order output types 1 amp 2 Dual 1 curve selectable Order output types 1 amp 2 Dual Input Channel 1 thermocouple type J K E and Channel 2 process 0 5V VDC 0 10V VDC 0 20mA 4 20mA Order output types 1 amp 2 Dual zone units must use ungrounded thermocouples ouarn
36. on Offset Adjustment You may want your system to control to a temperature other than the value coming from the input sensor If so measure the difference between that temperature perhaps at another point in the system and the process value showing in the display Then enter the CAL offset value you want Calibration offset adds or subtracts degrees from the value of the input signal Tuning Chapter 4 WATLOW Series 733 734 Service Manual 21 Calibration Figure 25 Calibration Mode Parameters z NOTE While in the Calibra tion Mode all control outputs are OFF Chapter 5 The Calibration Mode Before attempting to calibrate make sure you have the proper equipment called for in each procedure Use the key sequence below to enter the Calibration Mode In the Calibration Mode various input signals must be supplied order for the control to go through its auto calibration Press the TIME key to advance through the Calabration Menu Use the UP DOWN keys D to change data After 1 minute with no key activactions the Series 733 734 reverts to the Operation mode 22 WATLOW Series 733 734 Service Manual Calibration Chapter 5 Before attempting to calibrate make sure you have the proper equipment called for in each procedure The Series 733 734 is calibrated and tested before leaving the factory Calibration Parameters Calibrate Determines which parameters if any are to be calibrated Ch
37. ook but since the temperature dropped the cooking time must be extended WatCurve determines the amount of time which must be added in relation to the drop in process temperature and the rate of rise Display alternates between parameter and programmed data CF F gb 4000 rtd din tcnP OFF NOTE Countdown time will speed up or slow down depending on WatCurve algo rithm Figure 23 WaitCurve Example a NOTE All menus will have the same time base hours minutes or minutes seconds Time Select Selects the time base used for the menu time and remaining time iS for each zone Can be expressed in either hours minutes or minutes seconds Range hrnn or nnSc Default nnSc nnSc Alarm Silence Enables or disables the alarm silence function This parameter only appears if your unit has alarms and AL1 no and SIL AL2 no Range OFF Default OFF Setup Mode Chapter 2 WATLOW Series 733 734 Service Manual 13 Display alternates between parameter and programmed data LAt nL InP1 J rL1 32 rH1 1382 HYS1 3 AL1 Pr A1LO 32 A1HI 1382 CAL1 0 InP2
38. oose one of the options below CALy ALL All parameters are calibrated The next parameter is InLO Only the process outputs are calibrated The display skips to the Ot1L parameter no No parameters are calibrated The display skips to the LgOt parameter rESt Restores factory calibration parameters See Page 26 for more information Input Low The low calibration point for each zone Input 0 00mV uncompensated InLO for thermocouple and process units Input 100 for RTD units Input High The high calibration point for each zone Input 50mV for single and dual versions or input 317 33 for RTD units or input 10V for dual input t c and process units on Zone 2 InHI mA Input High Represents the high current calibration point for Zone 2 input nAHI 20mA Applies only to thermocouple and process input Only applies to Zone 2 inputs Thermocouple Compensator Used to calibrate the thermocouple reference compensator for units with thermocouple input Input 0 00mV compensated through Type J reference compensator 32 F 0 C 4 20mA Output Low Zone 1 Represents the process output low current calibra tion point for Zone 1 Applies to 0 5VDC and 4 20mA outputs only Ot1L 4 20mA Output High Zone 1 Represents the process output high current calibration point for Zone 1 Applies to 0 5VDC and 4 20mA outputs only Ot1H 4 20mA Output Low Zone 2 Represents the process output low current calibra tion point for Zone 2 Appli
39. or tracks the set point This parameter only appears if your unit has alarms Range Pr dE no Default Pr Alarm 1 Low Represents the low process alarm or low deviation alarm for Zone 1 This parameter only appears if your unit has alarms and AL1 no If AL1 2 dE Range 0 to 999 F 0 to 555 C Default 999 F IfAL1 Pr Range rL1 to A1HI Default rL1 Alarm 1 High Represents the high process alarm or high deviation alarm for Zone 1 This parameter only appears if your unit has alarms and AL1 no If AL1 dE Range 0 to 999 F 0 to 555 C Default 999 IF AL1 Pr Range A1LO to rH1 Default rH1 Calibration Offset 1 Adds or subtracts degrees from the Zone 1 input signal Range 99 to 99 F 55 to 55 C Default 0 Input Type 2 Selects the sensor input type for Zone 2 Only those input types which are compatible with your unit will appear This parameter only appears if you have a dual zone control See the model number information on the inside back cover and Table 1 on Page 6 for your input type Range J appears as H E or rtd or 0 5 420 010 020 Default J or rtd or 0 5 WATLOW Series 733 734 Service Manual Setup Mode Chapter 2 Display alternates between parameter and programmed data Range Low 2 Selects the low end of the operating range for Zone 2 This parameter determines the low end of the process input set point and alarms See the model number and specification information on the inside back cover and
40. r a period of several hours at one temperature and then holds the food at another temperature Cycle time The time necessary to complete a full ON through OF F period in a time proportioning control system Deck Oven Stackable multiple chamber oven Derivative Anticipatory action that senses the rate of change of the process and compensates to minimize overshoot and undershoot Also rate Deviation alarm An alarm referenced at a fixed number of degrees plus or minus from set point 30 WATLOW Series 733 734 Service Manual Default parameters The parameters permanently stored in memory to provide a data base DIN Deutsche Industrial Norms a widely recog nized German standard for engineering units Droop Difference in temperature between set point and stabilized process temperature Duty cycle Percentage of load ON time relative to total cycle time Form A Single Pole Single Throw relay that only utilizes the N O and Common contacts These contacts close when the relay coil is energized The contacts open when power is removed from the control Form B Single Pole Single Throw relay that only utilizes the N C and Common contacts These contacts will open when the relay coil is energized The contacts will close when power is removed from the control Form C Single Pole Double Throw Utilizes the N O N C and Common contacts The user has the option of wiring for a Form A or Form B contact Re fer t
41. rameters Do not enter any values here make photocopies instead Parameter Value Range Factory Default Appears If CF CorF F gb 1 to 4000 F 2222 C 4000 F 2222 C rid JIS or din din Input type is RTD tncP On or OFF OFF tS hrnn or nnSc nnSc SIL On or OFF OFF Unit has alarms AL1 no amp AL2 no LAt LA or nL nL Unit has alarms AL1 amp AL2 no InP1 J appears as H or rtd J or rtd Dependent on model number information rL1 Sensor range low to rH1 Low limit sensor type rH1 Sensor range high to rL1 High limit of sensor type HYS1 1 to 99 F 1 to 55 C 3F AL1 Pr dE or no Pr Unit has alarms A1LO IfAL1 dE 0 to 999 F 999 F Unit has alarms amp 0 to 555 C AL1 no If AL1 Pr rL1 to rL1 A1HI IfAL1 dE 0 to 999 F 999 F Unit has alarms amp 0 to 555 C AL1 no If AL1 Pr A1LO to rH1 rH1 CAL1 99 to 99 F 55 to 55 C 99 to 99Units 0 InP2 J K appears as H E or J or rtd or 0 5 Dependent on model rtd or 0 5 420 010 020 number information rL2 Sensor range low to rH2 Low limit sensor type Hardware is present rH2 Sensor range high to rL2 High limit of sensor type Hardware is present HYS2 1 to 99 F 1 to 55 C 1 to 99 units 3 F Hardware is present AL2 Pr dE or no Pr Hardware is present A2LO If AL2 dE 0 to 999 F 999 F Hardware is present amp 0 to 555 C 0 to 999 Units AL2 no If AL2 Pr rL2 to A2HI rL2 A2HI If
42. re Repeat steps 4 through 7 using the Ot2L and Ot2H prompts Calibration Chapter 5 WATLOW Series 733 734 Service Manual 29 Glossary Alarm A condition generated by a controller indicating that the process has exceeded or dropped below a predetermined alarm set point Alarm Silence Disables the alarm relay output Anti reset Control feature that inhibits automatic reset action outside the proportional band Also known as reset windup inhibit Automatic prompts Data entry points where a microprocessor based control prompts or asks the operator programmer for information input Auto tune Automatically tunes the Series 733 734PID parameters to fit the characteristics of your particular thermal system Closed loop Control system that has a sensing device for process variable feedback Cold junction Point of connection between thermo couple metals and the electronic instrument Cold junction compensation Electronic means to compensate for the ambient temperature at the cold junction Combi oven Combination convection and steam oven that cooks large amounts of food in substan tially reduced time Conveyor Oven Oven with a conveyor that passes the food through it for a prescribed time It may have doors located along its length for adding food at different points thus varying cooking time for indi vidual products Cook and Hold Oven Slow cooker that cooks food typically large pieces of meat ove
43. rom the millivolt source to the control for each zone Allow at least 10 seconds to stabilize Press the Tlme key 5 At the InHI prompt enter 50 0mV from the millivolt source for each zone Allow at least 10 seconds to stabilize Press the Time key 6 Atthe tc prompt disconnect the millivolt source and connect the reference compensator t c calibrator to Terminal 2 Positive and Terminal 3 Negative for Zone 1 and to Terminal 5 Positive and Terminal 6 Negative for Zone 2 If using a compensator turn on and short the input wires If using J calibrator set to simulate 32 F 0 C Allow 10 seconds for the control to stabilize To conclude the t c calibration press the Time key to advance through the Calibration mode To continue calibrating your outputs press the Time key once The unit will leave the Calibration mode if 1 minute passes between key activations and retains all changed values Calibration Chapter 5 n NOTE Before calibration on an installed control make sure all data and param eters are docu mented See Setup and Service Tables Pages16 and 19 a NOTE Always press the Time key to advance to the next param eter before chang ing the calibration equipment WATLOW Series 733 734 Service Manual 25 Calibration RTD Field Calibration Procedure Single amp Dual RTD Only For model s 73XX 2XXX XXXX 73XX 5XXX XXXX Equipment Required 1K precision de
44. tional hazard which could affect your equipment or its performance A full explanation is in the narrow column on the outside of the page AN The WARNING symbol lightning bolt in the wide text column alerts you to a WARNING a safety hazard which could affect you and the equipment A full explanation is in the narrow column on the outside of the page 2 WATLOW Series 733 734 Service Manual Chapier 3 16 The Service Mode 17 Service Parameters 18 Service Mode Table Chapter 4 20 Auto Tuning 21 Manual Tuning Chapter 5 22 The Calibration Mode 23 Calibration Parameters 24 Calibration Procedures Appendix 30 Glossary 32 Index 33 Warranty Returns 34 Specifications 35 Ordering Information 36 CE Declaration of Conformity 37 Notes 38 Notes If you encounter a problem with your Series 733 734 control review all of your configuration information to verify that your selections are consistent with your application Inputs Outputs Alarms Limits etc If the problem persists after checking the above you can get technical assistance by dialing 1 507 454 5300 Technical Assistance An Application Engineer will discuss your problem with you Please have the following information available Revision number User s manual Complete model number e All configuration information The model and serial numbers can be found on the outside of the case Your Feedback Your comments or suggestions on the manua
45. tlow products include electric heaters sensors controls and switching devices The Winona operation has been designing solid state electronic control devices since 1962 and has earned the reputation as an excellent supplier to original equipment manufactur ers These OEMs depend upon Watlow Controls to provide compatibly engineered controls which they can incorporate into their products with confidence Watlow Controls resides in a 100 000 square foot marketing engineering and manufacturing facility in Winona Minnesota Appendix Warranty Returns Returns 1 Call Watlow Customer Service 507 454 5300 for a Return Material Authorization RMA number before returning any item for repair We need this information Ship to address Contact name Phone number Ship via Your P O number Symptoms and or special instructions Name and phone number of person returning the material Bill to address 2 Prior approval and an RMA number from the Customer Service Department is needed when returning any unused product for credit sure the RMA number is on the outside of the carton and on all paperwork returned Ship on a Freight Prepaid basis 3 After we receive your return we will examine it and determine the cause for your action 4 n cases of manufacturing defect we will enter a repair order replacement order or issue credit for material A 20 percent restocking charge is applied for all returne
46. until the oil melts The melt cycle prevents burning the oil during start up ON OFF conirol Control of temperature about a set point by turning the output full ON below set point and full OFF above set point in the heat mode Open loop System with no sensory feedback Output Action in response to difference between set point and process variable Overshoot Condition where temperature exceeds set point due to initial power up or process changes Parameter A physical property whose value deter mines the response of an electronic control to given inputs PID control Proportioning control with auto reset and rate Also known as 3 mode control Pressure Fryer Fries food under pressure Proofer Cabinet for raising breads and pastries Process variable Thermal system element to be regulated such as time temperature relative humid ity etc Proportional band Span of temperature about the set point where time proportional control action takes place Rate Anticipatory action that senses the rate of change of temperature and compensates to minimize overshoot Also derivative Reset Control action that automatically eliminates offset or droop between set point and actual process temperature Also integral RTD Resistance Temperature Detector Resistive sensing device displaying resistance versus tempera ture characteristics Displays positive temperature coefficient Appendix Glossary Z
47. which a controller proportioning function is active for Zone 2 When Pb2 0 it functions as an ON OFF control The switching differential is then determined by the HYS2 parameter This parameter only appears if you have a dual zone control Range 0 to 999 F 0 to 555 C 0 to 999 units Default 25 Reset 2 A reset integral control action for Zone 2 automatically eliminates offset or droop between set point and actual process temperature in a proportional control This parameter only appears if your unit has a secondary output and Pb2 0 Range 0 00 to 9 99 repeats minute Default 0 00 Rate 2 The rate derivative function for Zone 2 which affects the speed or rate at which the process temperature approaches the set point to minimize overshoot and or undershoot The rate is determined by how fast the error is changing This parameter only appears if your unit has a secondary output and Pb2 0 Range 0 00 to 9 99 minutes Default 0 00 WATLOW Series 733 734 Service Manual Service Mode Chapter 3 Service Display alternates between parameter and programmed data Cycle Time 2 Expressed in seconds time for a controller to complete one ON 912 OFF cycle for Zone 2 Time between successive turn ons This parameter only appears if you have a dual zone control and Pb2 0 5 Range 1 to 60 seconds Default 5 Menu Steps Determines the
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