Controls overview – Shellab SRI20-2 User Manual
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CONTROLS OVERVIEW
4.1
Power Switch: The main power I/O (on/off) switch controls all power to the unit and
must be in the I/ON position before any systems are operational.
4.2
Main Temperature Control: The Main Temperature Control is marked SET
TEMPERATURE and consists of the digital display and UP and DOWN arrow pads for
inputting set point temperatures and calibration.
4.3
HEATING Light: This pilot lamp is ON when the unit is heating up to set point and is
blinking when controlling temperature at set point.
4.4
Overtemperature Thermostat: This controller is marked SET OVERTEMPERATURE
and is equipped with an adjustment knob and a graduated dial from 0 to 10. Completely
independent of the Main Temperature Controller, the Overtemperature Thermostat
guards against any failure of the Main Temperature Controller which would allow
temperature to rise past set point. If temperature rises to the Overtemperature set point,
the Thermostat takes control of the heating element and allows continued use of the
incubator until the problem can be resolved, or service can be arranged. It is not
recommended that the unit be allowed to operate for an extended period of time using
only the Thermostat as temperature uniformity will suffer.
4.5
OVER TEMP Light: This pilot light comes on when the Overtemperature Thermostat
has been activated. Under normal operating conditions this light should never come on.
4.6
Low Limit Thermostat: Located on the lower right rear of the unit, the Low Limit
Thermostat keeps the unit from freezing. It is factory set to activate at 1
C.
4.7
Defrost Switch: Used to defrost the unit if frost should form. It is an ON/OFF switch
located on the top right, rear of the unit.
4.8
Fuse: Located on the back, bottom near the cord inlet. adjacent t the defrost switch in
place of the circuit breaker, the fuse offers protection against power source variations.
Protection is in addition to the automatic high temperature limit designed into the heating
element. If the fuse is blown, the unit will shut down and the cause should be
determined and corrected before replacing the fuse.
Section
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