Memmert INCO 246/246 med CO2 Incubators (Generation 2003) - Manual (Page 53)

53
Advanced functions
7.6 Calibration
7.6.1 Temperature calibration
The incubator can be calibrated customer-specifically using three calibration temperatures of
your choice:
► CAL.1 Temperature calibration at low temperature (to 30°C)
► CAL.2 Temperature calibration at medium temperature (from 30°C to 38°C)
► CAL.3 Temperature calibration at high temperature (over 38°C)
For each selected balance point ( Fig. 28 ) a positive or negative compensation correction value
can be set between -2.9 °C and +2. 9 °C. There must be a difference of at least 10 ºC between
each of the individual balance points.
CAL. 1
+0,2 °C
CAL. 3
+0,3 °C
CAL. 2
-0,4 °C
Default
calibration
30°C 20°C 0° 10°C 40°C
Fig. 28 Temperature calibration (example)
Setting:
1. Set compensation temperature in the SETUP (see page 46 ) and set accompanying com-
pensation correction value to 0.0 °C.
2. With a reference instrument, measure the deviation in the stationary state in the selected
compensation temperature.
3. Set the compensation correction value in the SETUP. If the measured reference tempera-
ture is too low, the compensation correction value must be set with a negative sign.
4. Perform a control measurement with the reference instrument.
5. Repeat the procedure for the other two balance points if necessary.
Example: The temperature deviation in the chamber load at 35 °C should be corrected.
1. Set the compensation temperature CAL.2 in the SETUP to 35.0 °C and the accompanying
compensation correction value to 0.0 °C:
h
°C °C °C