Design And Function - WIKA STW15 Manual De Instrucciones

2. Design and function

2. Design and function
2.1 Overview
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Case
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Mounting bracket
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Measuring line
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Temperature probe
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Marking of factory-preset switch point, not adjustable
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2.2 Description
The closed measuring system with gas filling consists of a temperature probe, a measuring
line and a Bourdon tube. Heat applied to the temperature probe produces change in
pressure in the closed system. This results in deflection of the Bourdon tube which is
displayed via the the pointer shaft.
The model STW15 exhaust gas temperature controller is used for flue-gas monitoring in
heat generation plant. When a fixed switch point is reached or when there is a measuring
line break, the micro switch triggers a switching operation. This action is carried out by
means of a shifting disc that is arranged at the pointer shaft. The exhaust-gas temperature
controller switches back automatically after the specified safe operating condition has
been reached.
WIKA operating instructions model STW15
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EN
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