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 November 1995 Supersedes without change: W733-XSMN Rev D00 $10.00 Made in the U.S.A.
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 conjunction with the Series 733/734 Program Manual and Data Communications manual.
Install Chapter 1 Install and Wire the Series 733/734 Front panel mounting for ease of installation and service. WATL W EVENT READY Figure 1 Series 733 and 734 Dimensions. LOAD 1 1.975 (50 mm) 10.625" (270 mm) MENUS 1 2 3 4 5 6 7 8 9 10 11 12 10.625" (270 mm) WATL W READY EVENT 3.25" (83 mm) LOAD 1 MENUS 1 2 3 4 5 6 7 8 9 10 11 12 SERIES 734 SERIES 733 3.25" (83 mm) Series 733 10.13" (257 mm) Series 734 9.78" (248 mm) R 0.125" (3 mm) Max. 3.13" (80 mm) 2.
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. 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.
Wiring Power Wiring 21 54 87 11 0 1 3 6 9 12 Figure 7 Å (VAC) Power 24VÅ Wiring. ∫ WARNING: To avoid potential electric shock, use National Electric Code (NEC) safety practices when wiring and connecting this unit to a power source and to electrical sensors or peripheral devices. L2 Fuse L1 Input Wiring Use this wiring connector as a reference for terminal orientation. Each individual wiring breakdown will only show the terminals used.
Input Wiring Thermocouple Input ˜ NOTE: Dual-zone thermocouple units require at least one ungrounded thermocouple. 73XX-1XXX-XXXX ˜(Dual Zone Only) 73XX-4XXX-XXXX 73XX-6XXX-XXXX Zone 1 73XX-4XXX-XXXX Zone 2 1 4 + 2 Figure 9 Thermocouple Wiring. 5 - 3 6 + - RTD Input (Dual Zone Only) 73XX-2XXX-XXXX 73XX-5XXX-XXXX Zone 1 73XX-5XXX-XXXX Zone 2 3 Wire RTD Figure 10 2 or 3 Wire RTD Wiring.
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 Wiring. 4 5 6 + - 0-20mA or 4-20mA Process Input Model # 73XX-6XXX-XXXX (Dual Zone Only) Zone 2 4 IDC 5 6 Install & Wire, Chapter 1 Figure 12 0-20mA or 4-20mA Process Input Wiring.
Output 1 Wiring AC Output Wiring - Zone 1 Solid State Relay without Contact Suppression Form A, 0.4Amps Off state impedance: 31M max. 73XX-XKXX-XXXX Form A, 1 Amp Off state impedance: 20k max. 73XX-XEXX-XXXX 3 Figure 13 AC Output 1 Wiring. 87 11 0 1 Solid State Relay without Contact Suppression 9 12 Form A, 1 Amp Off state impedance: 20K min. 73XX-XDXX-XXXX 54 Form A, 0.4 Amps Off state impedance: 20K max.
Output 2 Wiring AC Output Wiring - Zone 2 Solid State Relay with Contact Suppression Mechanical Relay with Contact Suppression Form A, 0.4 Amps Off state impedance: 20K max. 73XX-XXBX-XXXX Form A, 1 Amp Off state impedance: 20K min. 73XX-XXDX-XXXX Solid State Relay without Contact Suppression Form A, 04 Amps Off state impedance: 31M max. 73XX-XXKX-XXXX External Load NO L2 COM L1 21 54 87 11 0 1 3 6 9 12 Fuse Figure 15 AC Output 2 Wiring.
Optional Wiring Event Input Wiring Event Input 1 7 8 2 Event Inputs Non-isolated 73XX-XXX1-XXXX 1 4 NOTE: Event Input is not available on standard Series 733/734 controls. Consult factory for more information. 2 5 ˜ 9 3 6 Event Input 2 Figure 17 Event Input Wiring.
System Example L1 L2 A001-0249-0001 Over Temp Light 9 6 Coil 142A-36XX-1200 UL recognized safety limit control NC NO C 3 High Limit Mechanical Contactor 2 73XX-1CA0-AXXX L1 L2 (-) 2 (+) Limit Sensor (-) (+) 3 TC (-) (+) Reset Normally Open Momentary Switch SSR-240-10G-DC1 Figure 20 System Wiring Example. Process Sensor L2 A001-0249-0001 1 1 3 2 4 5 2 6 3 6 4 7 (+) 5 8 (-) 9 Series 733 73XX-1CA0-AXXX 2 3 3 6 9 Figure 21 Series 733/734 Ladder Diagram Example.
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]. Figure 22 Setup Mode Key Flow.
Setup Display alternates between parameter and programmed data. Setup Parameters Celsius_Fahrenheit: Selects the units of temperature measurement. Range: F or C Default: F C_F 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. It you are out of the guard band, the READY LED is OFF and the menu will not run.
Setup Display alternates between parameter and programmed data. LAt nL InP1 J rL1 32 rH1 1382 HYS1 3 AL1 Pr A1LO 32 A1HI 1382 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: J or rtd Range Low 1: Selects the low end of the operating range for Zone 1.
Setup 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 Table 1 below for sensor range values. 0.0VDC, 0mA 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.
Setup Setup Mode Table 2 Setup Mode Parameters and Descriptions. Use this page as a master copy for your Series 733/734 Setup mode parameters. Do not enter any values here; make photocopies instead.
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 activations, the Series 733/734 reverts to the Operation mode [0)º0].
Service Display alternates between parameter and programmed data. AUt1 0 Service Parameters Auto-tune Zone 1: Initiates auto-tune for Zone 1. For more information on tuning, 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 AUt2 0 Pb1 25 rE1 0.00 rA1 0.00 Ct1 5 Pb2 25 rE2 0.00 rA2 0.
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 Ct2 Menu Steps: Determines the maximum number of steps allowed in a menu.
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. ˜ NOTE: An X applies to either Zone 1 or Zone 2.
Tuning 2. Select a thermal response value using the UP/DOWN keys, 1=slow, 2=medium, 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.
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. Press the TIME key to advance through the Calabration Menu. Use the UP/DOWN keys to change data.
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 of the options below: ALL OUt no rESt CALy All parameters are calibrated. The next parameter is InLO. Only the process outputs are calibrated. The display skips to the Ot1L parameter. No parameters are calibrated.
Calibration rSt LgOt LI HEy dISP Restore : Restores factory calibration parameters. See below for more information. Logic Output Test: Used to test all the control and logic outputs. 0 = All outputs 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.
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. Setup And Calibration ˜ 1.
RTD Calibration RTD Field Calibration Procedure (Single & Dual RTD Only) For model #'s: ˜ NOTE: Before calibration on an installed control, make sure all data and parameters are documented. See Setup, and Service Tables, Pages16 and 19. 73XX-5XXX-XXXX Equipment Required: • 1K precision decade resistance box with 0.01 resolution. For dual zone units, two decade boxes are reqiured. Setup And Calibration ˜ 1. Connect the AC line voltage L1 and L2 to the proper terminals. 2.
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 • 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 ˜ 1.
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-XFFX-XXXX Equipment Required • 300 , 1/2 watt 10% resistor. Setup And Calibration ˜ NOTE: Before calibration on an installed control, make sure all data and parameters are documented. See Setup and Service Tables, Pages 16 and 19. 28 73XX-XXFX-XXXX • 4 - 1/2 digit Digital Multimeter. ˜ 1.
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. Î (VDC) Output Field Calibration Procedure Zone 1 0-5VÎ For model #'s: 73XX-XHXX-XXXX 73XX-XHHX-XXXX Equipment Required • 20K 1/4 watt 10% resistor. Setup And Calibration 73XX-XXHX-XXXX • 4 - 1/2 digit Digital Multimeter. ˜ 1. Connect the AC line voltage L1 and L2 to the proper terminals of the 733/734. ˜ 2.
Glossary, A - I 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.
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 application 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.
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 &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 Nu
Warranty/Returns Warranty Returns 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 warranted for 100,000 cycles. 1. Call Watlow Customer Service, 507/454-5300, for a Return Material Authorization (RMA) number before returning any item for repair.
Specific 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.
Model Number 7 3 _A- _ _ _ _ - _ _AA 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.
Declaration of Conformity WATLOW CONTROLS 124 1 Bundy Boulevard Winona, Minnesota 55987 USA Declares that the following product: Series 733 I734 733A-4BB l-AAAG Electronic Incorporated Class III temperature controller, Type 2C action, for use in light industrial environment 24V- (VAC) 0.
Notes Appendix WATLOW Series 733/734 Service Manual 37
Notes 38 WATLOW Series 733/734 Service Manual Appendix
Appendix WATLOW Series 733/734 Service Manual 39
Watlow Series 733/734 Service Manual Watlow Controls, 1241 Bundy Blvd., P.O.
