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Watlow Electric 733 Series Service Manual

Time/temperature control
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Series 733/734
Total
Customer
Satisfaction
3 Year
Warranty
Time/Temperature
Control
Service Manual
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 D00

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  • Page 1 Series 733/734 Total Customer Satisfaction 3 Year Warranty Time/Temperature Control Service Manual 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 D00...

  • Page 2: Table Of Contents

    Contents 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. Page Item Chapter 1 Chapter 3 Install and Wire the Series 733/734 The Service Mode...
  • Page 3 Install Chapter 1 Install and Wire the Series 733/734 Front panel mounting for ease of installation and service. TL W Figure 1 - EVENT READY LOAD 1 Series 733 and 734 1.975 Dimensions. (50 mm) 10.625" (270 mm) MENUS 10.625" (270 mm) TL W 3.25"...

  • Page 4: How To Wire The Series 733/734

    Wiring 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 and compare your model number to those shown here and also the model number breakdown on the inside back cover of this manual.

  • Page 5: Power Wiring

    Wiring Power Wiring Figure 7 - 24VÅ Å Å Å Å (VAC) Power Wiring. ∫ WARNING: To avoid potential electric shock, use Fuse National Electric Code (NEC) safety practices when wiring and connect- ing this unit to a power source and to electrical sensors or Input Wiring peripheral devices.
  • Page 6 Input Wiring Thermocouple Input ˜ 73XX- XXX-XXXX (Dual Zone Only) ˜ 73XX- XXX-XXXX NOTE: 73XX- XXX-XXXX 73XX- XXX-XXXX Dual-zone thermo- Zone 1 Zone 2 couple units require at least one un- grounded thermocouple. Figure 9 - Thermocouple Wiring. RTD Input (Dual Zone Only) 73XX- XXX-XXXX...
  • Page 7 Input Wiring 0-5VDC or 0-10VDC Process Input Model # 73XX- XXX-XXXX (Dual Zone Only) Zone 2 Figure 11 - 0-5VDC or 0-10VDC Process Input Wiring. 0-20mA or 4-20mA Process Input Model # 73XX- XXX-XXXX (Dual Zone Only) Zone 2 Figure 12 - 0-20mA or 4-20mA Process Input Wiring.

  • Page 8: Output 1 Wiring

    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...

  • Page 9: Output 2 Wiring

    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...

  • Page 10: Event Input Wiring

    Optional Wiring Event Input Wiring ˜ Event Input 1 2 Event Inputs NOTE: Non-isolated Event Input is not 73XX-XXX1-XXXX available on stan- dard Series 733/734 controls. Consult factory for more information. Event Input 2 Figure 17 - Event Input Wiring. Common Event Output Wiring 4 Event Outputs...

  • Page 11: System Wiring Examples

    System Example A001-0249-0001 Over Temp Light Coil 142A-36XX-1200 UL recognized safety limit control High Limit Figure 20 - Mechanical System Wiring Contactor Example. 73XX-1CA0-AXXX Reset Limit Sensor Normally Open Momentary Switch SSR-240-10G-DC1 Process Sensor A001-0249-0001 Series 733 73XX-1CA0-AXXX Figure 21 - Series 733/734 Ladder Diagram SSR-240-10G-DC1...

  • Page 12: Chapter 2 The Setup Mode

    Setup 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 . After 1 minute with no key activactions, the Series 733/734 reverts to the Operation mode [0)º0].

  • Page 13: Setup Parameters

    Setup Display alternates between parameter and Setup Parameters programmed data. Celsius_Fahrenheit: Selects the units of temperature measurement. Range: F or C Default: F Guard Band: Determines the process operating window (deviation) that both Zone 1 & 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.
  • Page 14 Setup Display alternates between parameter and programmed data. 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.
  • Page 15 Setup Display alternates Range Low 2: Selects the low end of the operating range for Zone 2. This parameter between parameter and determines the low end of the process input, set point and alarms. See the model programmed data. number and specification information on the inside back cover, and Table 1 below for sensor range values.
  • Page 16 Setup Setup Mode Table 2 - Setup Mode Use this page as a master copy for your Series 733/734 Setup mode parameters. Parameters and Descriptions. Do not enter any values here; make photocopies instead. Parameter Value Range Factory Default Appears If: C or F 1 to 4000°F/2222°C 4000°F/2222°C...

  • Page 17: Chapter 3 The Service Mode

    Service Chapter 3 The Service Mode Enter the Service mode by pressing the key sequence illustrated below. The display shows the [AUt1] parameter. Move through the Service mode by pressing the TIME key Use the UP/DOWN keys to select data. After 1 minute without key activa- tions, the Series 733/734 reverts to the Operation mode [0)º0].

  • Page 18: Service Parameters

    Service Display alternates between parameter and Service Parameters programmed data. Auto-tune Zone 1: Initiates auto-tune for Zone 1. For more information on tuning, see Chapter 4, Page 19. AUt1 Range: 0 = off, 1 = slow, 2 = medium, 3 = fast Default: 0 Auto-tune Zone 2: Initiates auto-tune for Zone 2.
  • Page 19 Service Display alternates between parameter and programmed data. Cycle Time 2: Expressed in seconds, time for a controller to complete one ON/ OFF cycle for Zone 2. Time between successive turn ons. This parameter only appears if you have a dual zone control, and Pb2 0. Range: 1 to 60 seconds Default: 5 Menu Steps: Determines the maximum number of steps allowed in a menu.

  • Page 20: Chapter 4 Auto-Tuning

    Tuning 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.

  • Page 21: Manual Tuning

    Tuning 2. Select a thermal response value using the UP/DOWN keys, 1=slow, 2=me- dium, and 3=fast. A thermal response value of 2 satisfactorily tunes most thermal systems. When tuning is complete, the display returns to its previous state and AUtX reverts to 0.

  • Page 22: Chapter 5 The Calibration Mode

    Calibration 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 in order for the control to go through its auto calibration.

  • Page 23: Calibration Parameters

    Calibration ç 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. Choose one CALy of the options below: All parameters are calibrated.
  • Page 24 Calibration Restore : Restores factory calibration parameters. See below for more informa- tion. LgOt Logic Output Test: Used to test all the control and logic outputs. All outputs OFF Output #1 ON Output #2 ON Alarm ON Event #1 ON Event #2 ON Event #3 ON Event #4 ON...

  • Page 25: Calibration Procedures

    T/C Calibration Calibration Thermocouple Field Calibration Procedure (Single & Dual Thermocouple Only) For model #'s: 73XX-1XXX-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.
  • Page 26 RTD Calibration RTD Field Calibration Procedure (Single & Dual RTD Only) For model #'s: 73XX-2XXX-XXXX 73XX-5XXX-XXXX Equipment Required: ˜ • 1K precision decade resistance box with 0.01 resolution. For dual zone units, two decade boxes are reqiured. NOTE: Before calibration on an installed ˜...
  • Page 27 T/C-Process Input Thermocouple/Process Input Field Calibration Procedure 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 •...
  • Page 28 4-20mA Output The calibration procedure for Zone 1 and Zone 2 are the same except use the Ot2L and Ot2H parameters for Zone 2. Zone 1 4-20mA Output Field Calibration Procedure For model #: 73XX-XFXX-XXXX 73XX-XXFX-XXXX 73XX-XFFX-XXXX Equipment Required • 300 , 1/2 watt 10% resistor. •...
  • Page 29 0-5V Output The calibration procedure for Zone 1 and Zone 2 are the same except use the Ot2L and Ot2H parameters for Zone 2. Zone 1 0-5VÎ Î Î Î Î (VDC) Output Field Calibration Procedure For model #'s: 73XX-XHXX-XXXX 73XX-XXHX-XXXX 73XX-XHHX-XXXX Equipment Required...
  • Page 30 Glossary, A - I Alarm: A condition, generated by a controller, Default parameters: The parameters permanently indicating that the process has exceeded or dropped stored in memory to provide a data base. below a predetermined alarm set point. DIN: Deutsche Industrial Norms, a widely-recog- Alarm Silence: Disables the alarm relay output.
  • Page 31 Integral: Control action that automatically eliminates Glossary, I - Z offset, or “droop,” between set point and actual process temperature. Also "reset." Isolation: Electrical separation of sensor or other Set point: Intended value of the process variable. device from high voltage circuitry. Allows for applica- tion of grounded or ungrounded sensing element.

  • Page 32: Index

    Index Advancing Through Setup, 12 Panel Cutout, 3 Alarm, Power Wiring, 5 Parameters, 14 - 16 Process, Wiring, 10 Calibration, 28 - 29 Appendix, 30 Input Wiring, 4 - 7 Auto-tuning, 20 Output 1, 8 Output 2, 9 Proportional Band, 18 Calibration,22 - 29 Q, R Changing Setup Data, 12...

  • Page 33: Warranty/Returns

    Freight Prepaid basis. Watlow Controls 3. After we receive your return, we will examine it Watlow Controls is a division of Watlow Electric and determine the cause for your action. Mfg. Co., St. Louis, MO, a manufacturer of indus- trial electric heating products, since 1922.

  • Page 34: Specifications

    Specific 240VÅ (VAC), 1/8 hp. @ 120/240VÅ (VAC), 125VA Specifications pilot duty @ 24/120/208/240VÅ (VAC). Off state impedance is 20K minimum. 200m contact resistance, maximum. • Switched DC, 500 minimum load resistance, 1K Control Mode load, 9mA minimum, 22mA maximum, non-isolated. •...
  • Page 35 Model Number 7 3 _ A - _ _ _ _ - _ _ A A 733/734 = One or two channel microprocessor-based, time and temperature control; 24VÅ (VAC) power input. *Order power supply and connector kit(s) separately below. Display Orientation Horizontal Vertical Display Location...

  • Page 36: Declaration Of Conformity

    Declaration of Conformity WATLOW CONTROLS 124 1 Bundy Boulevard Winona, Minnesota 55987 Declares that the following product: Series 733 I734 Designation: 733A-4BB l-AAAG Model Number: Electronic Incorporated Class III temperature controller, Classification: Type 2C action, for use in light industrial environment 24V- (VAC) Rated Voltage: 0.25OA...

  • Page 37: Notes

    Notes Appendix WATLOW Series 733/734 Service Manual...

  • Page 38: Notes

    Notes WATLOW Series 733/734 Service Manual Appendix...
  • Page 39 Appendix WATLOW Series 733/734 Service Manual...
  • Page 40 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 WATLOW Series 733/734 Service Manual Appendix...

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734 series

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