Commissioning, operation – WIKA TGT73 User Manual
Page 15
GB
Thermowell
Stem
Required safety
clearance
14028755.02 08/2012 GB/D/F/E
WIKA operating instructions model TGT73
15
3. Position the indicator as required, tighten the hexagon bolts and
slotted screws, and finally tighten the lock nut or union nut firmly.
When using thermowells, they must be filled with a thermal contact
medium in order to reduce the heat transfer resistance between the
outer wall of the sensor and the inner wall of the thermowell. The
working temperature of the thermal compound is -40 ... +200 °C.
WARNING!
Do not fill hot thermowells. There is a risk of the oil
spraying out!
6. Commissioning, operation
CAUTION!
When using thermowells, please
note that the stem must not touch
the bottom of the thermowell.
Due to the different coefficients
of expansion of the materials, the
stem can bend at the bottom of the
thermowell.
(For the formula for the calculation
of the insertion length, l
1
, see the
respective thermowell data sheet)
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