Memmert ICH 256 Climate Chambers (Generation 2003) - Manual (Page 61)

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Advanced Functions
3. Set compensation correction value for CAL.2 under SETUP to - 0.4 °C:
h
°C °C
4. After the calibration procedure, the reference instrument should display 35 °C.
5. With CAL.1, another compensation temperature below CAL.2 can be programmed in the
same way, and with CAL.3, one above this.
If all compensation correction values are set to 0.0 °C, the factory calibration settings are
restored.
7.8.2 Humidity calibration
The cooled incubator can be calibrated for the individual customer by means of two balance
points at 20 and at 80 % relative humidity. For each selected balance point, a positive or nega-
tive compensation correction value can be set between –5 % and +5 %.
rh 20
+3,0 %
rh 80
-2,0 %
60% 40% 0% 20% 80% 100%
Default calibrati
on
Fig. 29 Humidity calibration (example)
Setting: Setting:
1. Set the desired humidity balance point in the SETUP (see page 53 ) and set the accompany-
ing compensation correction value to 0.0°C.
2. With a reference instrument, measure the deviation in the stationary state in the selected
humidity balance point.
3. Under SETUP, adjust the compensation correction value. If the measured reference humid-
ity is too low, the compensation correction value must be set with a negative sign.
4. Perform a control measurement with the reference instrument.
The procedure can be performed with humidity balance points of 20 % rh and 80 % rh.