Thermo Forma 3980, Руководство пользователя

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Model 3980 and 3986 Incubators _______________________________Control Panel Operation
3 - 5
3.7 Audible Humidity Alarm and Indicator
The humidity alarm is a function of the humidity controller. When the cabinet humidity
goes outside the set parameters of the controller, L3 indicator on the controller lights, the
audible alarm sounds and the humidity alarm indicator on the control panel lights.
Pressing the Mode key on the controller silences the audible alarm and extinguishes the
humidity alarm indicator. The L3 indicator on the controller remains on until the cabinet
humidity returns to the parameter setpoint.
3.8 Dehumidify Switch and
Indicator Light
The dehumidify switch will
enable the refrigeration system if the
refrigeration switch is currently off.
When controlling humidity, the
dehumidification switch should be in the
ON position for most applications. The
dehumidification light will cycle on and
off as the humidity controller toggles
between humidify and dehumidify. The
dehumidify light will be de-energized
when the system is in Defrost mode.
Humidity is removed from the
cabinet by the refrigeration evaporator
coil. Moisture accumulates on the coil and
is collected into the evaporator pan. The
accumulated moisture is then plumbed to
the
back of the cabinet, which can be emptied to a floor drain, or an evaporative device.
3.9 Humidify Switch and Indicator Light
The humidify switch controls the power to the humidification system circuit. The
humidity indicator light will cycle as the controller toggles between humidify and
dehumidify.
humidify
humidity control
humidity
alarm
dehumidify purge
purge level
sample port
ON ON
5%
15%
10%
Figure 3-4
Humidity/CO
2
Detail