Memmert INCO 246/246 med CO2 Incubators (Generation 2003) - Manual (Page 54)

54
Advanced functions
2. With a calibrated reference instrument and at a set setpoint temperature of 35 °C in nor-
mal operation, an actual temperature of 34.6 °C is measured.
3. Set compensation correction value for CAL.2 in the SETUP to - 0.4 °C:
h
°C °C °C
4. The reference instrument after the calibration procedure should now 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 lying above this.
If all compensation correction values are set to 0.0 °C, the factory calibration settings are
restored.
7.6.2 Humidity calibration
The incubator can be calibrated for the individual customer by means of two balance points
at 20 and at 90 % relative humidity. For each selected balance point a positive or negative
compensation correction value can be set between –5 % and +5 %.
rh 20
+3,0 %
rh 90
-2,0 %
60% 40% 0% 20% 80% 100%
Default calibration
Fig. 29 Humidity calibration (example)
Setting:
1. Set the desired humidity balance point in the SETUP (see page 46 ) and set accompanying
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. Setting the compensation correction value in the SETUP. 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 90% rh.