Memmert ICH 256 Climate Chambers (Generation 2003) - Manual (Page 45)

45
Operation and Control
5.11 During operation
Regularly check the water level. If necessary, add distilled water.
Warning messages during operation: See page 47 .
CO
22
mode
In the heating up phase, the CO
2
controller is initially deactivated. The CO
2
inlet is interrupted
during this period. About 5 minutes after the setpoint temperature has been reached, the CO
2
control begins measuring and CO
2
gas is introduced into the chamber via a sterile filter. The
setpoint can be set from 0 to 20 % in 0.1 % steps.
Displays in CO Displays in CO
22
mode:
displayed during the heating up phase of the CO
2
sensor. In the CO
2
display, CO2 is shown.
displayed during the zero balance adjustment.
CO
2
After the setpoint temperature has been reached,
the CO
2
concentration is displayed in % depending
on the setting.
displayed if the CO
2
concentration exceeds the
defined setpoint by at least 1 % for more than 3
minutes. If the concentration is higher, the CO
2
display and the icon flash. icon flash.
In this case, you should open the door for 30 sec.
and wait to see if the controller steadily adjusts to
the setpoint. If the error occurs again, contact the
customer service.
This monitoring function only starts
working once the CO
2
setpoint has been
reached.
displayed if the gas bottle is empty. In this case,
connect a new gas bottles (see page 23).
The pressure in the gas bottles is a constant
approx. 57 bar at 20 °C ambient tempera-
ture. The pressure in the bottle cannot be
used to determine its filling level, since the
pressure only drops immediately before the
bottle is completely empty.