Memmert INCO 246/246 med CO2 Incubators (Generation 2003) User Manual
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Operation and control
To be on the safe side, a freshly filled CO
2
gas bottle should always be used. So if the gas in
bottle 1 is used up, you connect the opened bottle to IN1 and the newly filled bottle as a
reserve bottle to IN2.
The hose connection system used by Memmert shuts off automatically if a connection hose is
pulled off. You should still always close the stop valve on the gas bottle if a bottle is empty or
not connected.
IN 1
lights up when gas bottle 1 is active. If gas bottle 1 is empty,
there is an automatic switch-over to the reserve bottle.
IN 2
lights up after the switch-over to gas bottle 2 (reserve bottle).
Switching over to the reserve bottle is marked by a short re-
peated acoustic signal (about 3 seconds long) (the default after
switching on is gas bottle 1).
In the following cases, a switch-over is made from reserve bottle 2 back to the main supply
bottle 1:
►
if the reserve bottle is empty
►
each time after the appliance is switched on
►
after every change of the CO
2
setpoint
Humidity limit control
A humidity limit control prevents the formation of condensation water in the chamber and
at the same time ensures that the setpoint humidity is quickly reached, with short recovery
times.
The maximum achievable humidity can be adjusted in the standard model from 88 to 97% rh.
Active humidity control (only for models with humidity module)
The active humidity control guarantees that setpoint humidity is quickly reached, without the
use of water trays.
In the heating up phase, the humidity control is initially deactivated. Approx. 5 minutes after
the setpoint temperature is reached, the humidification and dehumidification control starts
working. The setpoint can be set from 40 to 97 % rh. The humidity setpoint can also be ad-
justed during the transient state. For humidification, water is let into the chamber via a dosing
pump. To avoid the formation of germs, the steam is first heated to approx. 140 °C. Dehumid-
ifcation takes place through the supply of dry air via a sterile filter.
If no humidity is required in the chamber, the humidity control can be deactivated by
setting it to OFF.