Commissioning, Operation - WIKA F73.100 Mode D'emploi

6. Commissioning, operation

6. Commissioning, operation
When screwing the gauges in, the force required to do this must not
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be applied through the casing, but only through the spanner flats
provided for this purpose and using a suitable tool.
Installation with
spanner
If possible, the entire length of the stem should be exposed to the
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temperature being measured. However, at least the length of the
active part that corresponds to the length of the gas expansion
vessel (active length).
In pipelines or other measuring points, the temperature probe must
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be angled as far towards the flow as possible.
Errors in thermal conduction occur if the area where the
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temperature is to be measured is so small, that the mass of the
temperature probe acts as thermal capacity. Errors in thermal
conduction may also occur if the immersion depth is insufficient, if
the mounting fittings are connected to a good thermal conductor
(metal plate or similar) and there is a considerable difference
in temperature between the measuring and mounting element
temperatures.
Mount the dial casing free from vibration. If necessary, it is possible
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to isolate the instrument from the mounting point by installing
a flexible connection line between the measuring point and the
thermometer and mounting the instrument on a suitable bracket.
10 WIKA operating instructions models 73, 74, 75