Note: Do not proceed through this section unless
there is a genuine need to recalibrate the controller.
All previous calibration data will be lost. Do not
attempt recalibration unless you have the appropriate
calibration equipment available. If the calibration
data is lost, you will need to return the controller to
your supplier who may charge a service fee for recal-
ibration.
Prior to calibration, ensure that all parameter settings
are correct (input type, °C /°F, resolution, low range,
high range).
1. Remove the sensor input wiring and connect a
standard input simulator of the correct type to the
controller input. Verify that the polarity is correct.
Set the simulated signal to coincide with the low
process signal (e.g., zero degrees).
2. Use the scroll key until " " appears on the
PV display. (Refer to 8.2)
3. Use the up and down keys until the SV display rep-
resents the simulated input.
4. Press the return key for at least 6 seconds (maxi-
mum 16 seconds), then release. This enters the low
calibration figure into the controller's non-volatile
memory.
5. Press and release the scroll key. " " appears
on the PV display. This indicates the high calibra-
tion point.
6. Increase the simulated input signal to coincide with
the high process signal (e.g., 100 degrees).
7. Use the up and down keys until the SV display rep-
resents the simulated high input.
8. Press the return key for at least 6 seconds (maxi-
mum 16 seconds), then release. This enters the
high calibration figure into the controller's non-
volatile memory.
9. Turn off power to the unit, remove all test wiring
and replace the sensor wiring (observing polarity).
6
*With power on, it takes 12 seconds to memorize the new values of parameters once they have been changed.
Chapter 7 Calibration
Chapter 8 Operation
8–1 Keypad Operation
