WIKA operating instructions RTD and TC, intrinsically safe designs
3345267.08 06/2011 GB/D
27
GB
3160670.06
Threaded connection
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11355647.01
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(NPT)
7.3.2 Increasing the separation of the connection components and hot surfaces
The neck distance (N) is dened as the distance between the lower edge of the connection head
(or the housing) to the heat-emitting surface. The temperature to be expected at the lower edge
of the connection head or housing is, at most, 100 °C. The conditions for built-in transmitters or
displays must be observed. If required, the neck length must be increased accordingly.
For thermometers tted with a connection lead, the temperature at the interface with the
connecting cable is restricted. The maximum is 150 °C. To ensure that the permissible
temperature is not exceeded, the dimension X must be selected accordingly.
7. Information on mounting, operation in hazardous areas (Europe)
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