Overview / Design Principle:
This unit is designed to operate in conjunction with a primary temperature controller to provide positive safety shutdown of industrial heating systems.
The instrument also contains a fail-safe feature in the event temperature drops below normal ambient because of accidental severance of sensing bulb or capillary. This instrument has manual reset, internal-switch actuation adjustment and is available with any temperature ranged element from -30°F to 1100°F. CSA and FM listed. Agency recognition is void if instrument is modified from factory standard.
Operation:
Switches are set at designated temperatures by removing the front cover and adjusting setting of switch actuating screws on the lever arms. The element failure switch is usually set at ambient temperature.
Adjustment is made by reference to a test thermometer of known accuracy, its probe placed adjacent to the thermal sensing bulb in the controlled medium.
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