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Calibration Loop
The Calibration Loop is used to calibrate the RTD high and low temperature.
The controller's internal temperature sensor is factory calibrated. We recom-
mend calibrating any remote sensor.
Enter the Calibration Loop from the Operator's Loop by pressing and holding
the NO key while pressing the YES key three times.
NOTE: Depressing the NEXT ENTER key when the controller displays rtd1 will
change the display to rtd2. The menus for rtd2 are identical to the rtd1 menus.
Calibration
Procedure
Install a calibrated reference thermometer in the bath. (For remote mode,
also install the sensor in the bath.) Place the cover on the unit.
The procedure involves using the Operator's, Setup and Calibration Loops.
Go to the Setup Loop and place the unit in the internal or remote RTD mode
of operation (RTD1 = Internal Probe, RTD2 = Remote Probe). Return to the
Operator's Loop adjust the setpoint to an appropriate high-end temperature.
Once the bath reaches the setpoint and stabilizes, go to the Calibration Loop
and, as illustrated on the next page, enter the actual reference thermometer
reading at the r1H or r2H prompt.
Save the change and return to the Operator's Loop. Adjust the setpoint to an
appropriate low-end temperature. Once the bath reaches the setpoint and
stabilizes, return to the Calibration Loop and enter the reference thermometer
reading at the r1L or r2L prompt. Save the change.
Do not pick points that are outside the safe operating limits of the fluid
in your application. For example with a water bath, 90°C and 5°C would
be typical calibration points.
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