Memmert ICH 256 Climate Chambers (Generation 2003) - Manual (Page 62)

62
Advanced Functions
Example: Humidity deviation at 80 % should be corrected.
1. Set humidity balance point in the SETUP to RH 80 and set the accompanying compensation
correction value to 0.0 %rh:
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
MIN
AUTO
MAX
2. With a calibrated reference instrument, an actual humidity of 78 % rh is measured at
normal operation, with a defined setpoint humidity of 80 % rh.
3. Set the compensation correction value in the SETUP for RH 80 to –2.0 % rh:
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 2 OUT IN 1 IN 2 OUT
MIN
AUTO
MAX
4. After the calibration procedure, the reference instrument should display 80.0 %.
With RH 20 a further comparison can be programmed at 20 % relative humidity.
If all compensation correction values are set to 0.0 % rh, the factory calibration settings
are restored.
7.8.3 CO
2
calibration
Customer 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
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)