14
E15 Sensor calibration T1
–5 to +5 K
0 K
(cold store)
E16 Sensor calibration T2
–5 to +5 K
0 K
(Evaporator)
E17 Operating of
0 = Relay de-energizes 2
compressor relay
1 = Relay is perma-
if cold store
nently energized
sensor T1 is
2 = Alternately ener-
defective
gized/de-ener-
gized according
to time set in
E18 and E19.
E18 “On” time at E17
1 to 99 mins.
15 mins.
E19 “Off” time at E17
1 to 99 mins.
15 mins.
To exit from the programming mode:
Press the
key after inputting the last level.
7.2 Sensor calibration (parameters 15 and E16)
The cold store and evaporator sensor can be calibrated.
Note:
An additional line resistor of 7
q
in each case,
caused by the extension of the sensor cable,
results in a change in the temperature display
by +1K.
How to proceed: Measure the temperature at the sensor concerned
with a calibrated thermometer or submerge the
sensor in well mixed iced water (0 °C)
Compare the measured temperature with the
temperature displayed on the unit display.
If the measured temperature is lower than the
one displayed, set the negative difference as the
programming value
(e.g. –2 K).
If the measured temperature is higher than the
one displayed, set the positive difference as the
programming value
(e.g. 2 K).
The temperature display is then corrected by the
set value.
