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Setting the actual
value correction
A correction can be made to the value as measured by the sensor, which
applies cumulatively over the entire measuring range.
This is necessary when:
- the length of the sensor cable is changed, or
- a faulty sensor is replaced, giving rise to an incorrect reading.
Caution - when changing the sensor:
Fault indication on the
display
Faults in the regulator are indicated by a flashing display as follows:
Fault
Sensor short circuit:
The sensor or sensor cable is faulty and must be
replaced or repaired. Parameter [C91] "Actual value
correction" must then be adjusted at programming
level.
Broken sensor:
The sensor or sensor cable is faulty and must be
replaced or repaired. Parameter [C91] "Actual value
correction" must then be adjusted at programming
level.
Memory fault:
Faulty regulator! Remove the regulator and send it for
repair.
Measurement range exceeded:
The maximum measurement range of the sensor has
been exceeded.
LED - Display
F1
F2
F3
FFF
The regulator is adjusted to the selected sensor in the
factory. When replacing a faulty sensor, use only the same
type.
In order to adjust the actual value correction, a reference thermometer is
needed.
Proceed as follows:
!
Install sensor.
!
Measure the temperature of the medium using the reference
thermometer.
!
Switch on the thermostat and set parameter [C91] in the
programming level to "0".
!
Switch back to working level and read the measured temperature
on the display.
!
Calculate the difference between the reference thermometer
temperature and the display reading.
!
Store the difference (pay attention to plus or minus) in the working
level under parameter [C91].
