Shellab SRI21D-2 - Manual (Page 6)

6
CONTROL PANEL OVERVIEW
The SRI21D (LI15) comes with one control (Watlow PM) that can be set to do all light and
temperature setting functions. It has an ON/OFF Power Switch to turn the unit ON or OFF and
one Over Temperature Protection for High Temperature Limit.
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: This control is marked SET TEMPERATURE and AM/PM
LIGHT CONTROL. It has two digital displays. Top Display reads PROCESS
TEMPERATURE and bottom display reads SET POINT TEMPERATURE. The control is a
40-Step Ramp and Soak Programmable Control with two (2) Event Outputs.
4.3 Over Temperature Thermostats: This control are marked SET OVER TEMPERATURE
and are equipped with adjustment knob and graduated dial. Completely independent of the
Main Controller, the Thermostat guards against any failure which would allow temperature
to rise past the Main Controllers set point. If temperature rises to the Over Temperature set
point, this 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 Over Temperature thermostat as temperature uniformity will suffer.
4.4 HEATING Light: Marked HEATING ACTIVATED, this pilot light indicates when the Main
Controller has activated the heating elements to reach and maintain set point temperatures.
4.5 OVERTEMP Light: Marked OVER TEMPERATURE ACTIVATED, this pilot light indicates
when the Over Temperature Thermostat has been activated. Under normal operating
conditions this pilot light should never come on.
4.6 Circuit Breaker: Located on the rear bottom next to the cord inlet provides protection
against power source variations. Protection is in addition to the automatic high temperature
limit designed into the heating element. If the Circuit breaker opens, the unit will shut down
and the cause should be determined and corrected before resetting the circuit breaker.
Section
4