Dräger Caleo Instructions For Use Manual page 160

Theory of Operation
Cleaning Mode
Safety Systems
*
Cleaning Mode
Cleaning mode is only provided if Caleo is equipped with
humidity control.
®
The Cleaning Mode (Caleo
®
cleaning of Caleo . The Cleaning mode must be used after
®
ending operation of Caleo
supply has been disconnected (see page 124).
Cleaning mode may only be used if Caleo is empty.
Cleaning mode is activated from the control unit by pressing
the "Menu" key and selecting the "Cleaning Mode" option.
In Cleaning mode, the water heater is forced to run dry. For this
purpose, the humidifier is heated to above 100
20 minutes, so that all remaining water in the humidifier is
evaporated. After the residual water has been evaporated, the
temperature in the humidifier is maintained at a temperature
o o
above 100 C (212 F) for approximately another 10 minutes.
Afterwards, the humidifier is allowed to cool down.
During or after cleaning mode, condensation could form under
the aggregate housing of the Caleo!
When there is no longer any danger of burns, a message is
displayed on screen to inform the user that Cleaning Mode has
concluded and that the incubator may now be dismantled for
disinfecting and cleaning (see "After cleaning mode is
complete", page 123).
Safety Systems
After switching on the incubator, it performs a self-test to check
all memory addresses of the microprocessor control system
and the proper running of all program segments.
Functions of the control elements and feedback messages are
tested by switching them on and off. This test is also performed
at ten-minute intervals during operation. In this test, all
modules installed in the incubator are tested. Any error
message will be displayed even when the module found to be
faulty was switched off at the time.
As a safety precaution, any non-permissible operating
condition will cause Caleo to switch off its main heater or water
heater, respectively.
An additional temperature sensor in the warm air vent limits
heater output in cases where the heater control would
generate maximum output over an extended period of time.
Typical situations are, e.g., opening of access doors for an
extended period of time, high setpoints (39
of low ambient temperatures (<22
warm air vent.
This safety feature significantly reduces the risk of burns
caused by excessively hot surfaces in the area of the air vents
or by vented warm air.
* Available option
160
™
CleanSwitch ) simplifies the
(see page 116), after the water
o
C (212
o
C) in the presence
o
C), or a partially obstructed
o
F) for