Explanation Of Controls - Thermo Scientific 625S User Manual

4

Explanation of Controls

Power "Circuit Breaker" Switch:
Controls all electrical power to the oven when energized. The blower motor will
always be in operation when the line switch is "On".
"High Limit" Control:
The function of this thermostat is to control the operation of the heater if either
the microprocessor or RTD should fail. During normal operation, the control is
set so that the pilot lamp, above the control knob, does not glow. A glowing lamp
indicates that the heater is not energized. When the control knob is rotated to its
maximum position (fully clockwise), the maximum chamber temperature will be
limited to 345°C.
"Temperature Control":
"TEMPERATURE" Controller: The microprocessor temperature controller
provided contains two digital displays - the upper display indicates chamber
temperature in °C and the lower display indicates the desired operating
temperature in °C.
Thermo Scientific Freas Safety Oven 4-1