Memmert ICH 256 Climate Chambers (Generation 2003) - Manual (Page 63)

63
Advanced Functions
Setting Setting
1. Set the desired CO
2
balance point in the SETUP (see page 53 ) and set the accompanying
compensation correction value to 0.0 %.
2. With a reference instrument, measure the deviation in the stationary state in the selected
CO
2
balance point.
3. Under SETUP, adjust the compensation correction value. If the measured reference CO
2
content is too low, the compensation correction value must be set with a negative sign.
4. Perform a control measurement with the reference instrument.
5. The procedure can be performed for the CO
2
balance points 5 %, 10 % and 15 %.
Example: CO
2
deviation at 10 % should be corrected:
1. Set the CO
2
balance point in the SETUP to CO2 10 and set the accompanying compensation
correction value to 0.0 %:
PRINT SETUP
loop
t3
t4 t2
t1
on
off
Mo Tu We Th Fr Sa Su
3
4
2
1
STERI DEFRO
°C °C
rh
mb
% CO
mb
2
IN 1 IN 2 OUT IN 1 IN 2 OUT
MIN
AUTO
MAX
2. With a calibrated reference instrument and at a defined setpoint CO
2
content of 10.0 %, an
actual CO
2
content of 11.5 % is measured.
3. Set the compensation correction value in the SETUP for CO2 10 to 1.5 %:
PRINT SETUP
loop
t3
t4 t2
t1
on
off
Mo Tu We Th Fr Sa Su
3
4
2
1
STERI DEFRO
°C °C
rh
mb
% CO
mb
2
IN 1 IN 2 OUT IN 1 IN 2 OUT
MIN
AUTO
MAX
4. The reference instrument should display 10 % after the calibration procedure.
With CO2 5 and CO2 15, further calibrations can be programmed at 5 % and 15 %.
If all compensation correction values are set to 0.0 %, the factory CO
2
calibration
settings are restored.