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Calibration, Chapter 5
23
WATLOW Series 733/734 Service Manual
Calibration
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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.
CALy
InLO
InHI
nAHI
tC
Ot1L
Ot1H
Ot2L
Ot2H
Calibration Parameters
Calibrate: Determines which parameters, if any are to be calibrated. Choose one
of the options below:
ALL All parameters are calibrated. The next parameter is InLO.
OUt 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
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 t/c versions, or input 317.33 for RTD units, or input 10V for dual input t/c and
process units on Zone 2.
mA Input High: Represents the high current calibration point for Zone 2, input
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.
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.
4-20mA Output Low (Zone 2): Represents the process output low current calibra-
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
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.