Memmert INCO 246/246 med CO2 Incubators (Generation 2003) - Manual (Page 56)

56
Advanced functions
7.6.3 CO
2
calibration
Customer-side calibration of appliance on controller by means of three CO
2
points:
► CO2 5 CO
2
calibration at 5 % CO
2
content
► CO2 10 CO
2
calibration at 10 % CO
2
content
► CO2 15 CO
2
calibration at 15 % CO
2
content (only for models with
CO
2
or premium modules)
For each selected balance point a positive or negative compensation correction value can be
set.
co2 5
-0,4 %
20% 0% 10%
co2 10
+1,5 %
co2 15
-0,7 %
Default calibration
Fig. 30 CO
2
calibration (example)
Setting
5. Set the desired CO
2
balance point in the SETUP (see page 46 ) and set accompanying
compensation correction value to 0.0 % rh.
6. With a reference instrument, measure the deviation in the stationary state in the selected
CO
2
balance point.
7. Set the compensation correction value in the SETUP. If the measured reference CO
2
content
is too low, the compensation correction value must be set with a negative sign.
8. Perform a control measurement with the reference instrument.
9. The procedure can be performed for the CO
2
balance points 5 %, 10 % and 15 %
(15 % only for models with CO
2
or premium modules).