Assessments - 4, GPA: 3.5
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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 tC 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 calibration 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 Ot1H calibration point for Zone 1. Applies to 0-5VDC and 4-20mA outputs only. 4-20mA Output Low (Zone 2): Represents the process output low current calibra Ot2L tion point for Zone 2. Applies to 0-5VDC and 4-20mA outputs only. This parameter only appears if you have a dual zone control. 4-20mA Output High (Zone 2): Represents the process output high current Ot2H 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. Calibration, Chapter 5 WATLOW Series 733/734 Service Manual rSt LgOt Calibration LI 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 = 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. 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. rSt LgOt Calibration LI 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 = 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. 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 . 2. [CALY]appears. Press the Up key until the [rESt]parameter appears. 3. Press the Time key , the [`rSt]parameter is displayed. 4. Press the Up key once and [`YES]will appear. Press the Time key . 5. The Series 733/734 will beep and advance to the [LgOt]parameter. This procedure is only to be used to restore calibration. It is not meant to default any other values. WATLOW Series 733/734 Service Manual Calibration, Chapter 5 T/C Calibration T/C 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. 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. At the CALy parameter, select ALL. At the InLO prompt, enter 0.00 mV from the millivolt source to the control for each zone. Allow at least 10 seconds to stabilize. Press the TIme 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. 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, 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 t...
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