WIKA 73 - Manual (Page 12)

GB
12099431.05 10/2010 GB/D/F/E
12 WIKA operating instructions models 73, 74, 75
6. Commissioning, operation
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!
CAUTION!
When using thermowells, please
ensure that the stem does not
touch the bottom of the thermowell
since, due to the different
expansion coefficients of the
materials, the stem may become
buckled at the bottom of the
thermowell.
(Formula for the calculation of the
stem length l
1
see the respective
thermowell data sheet)
Thermowell
Stem
required safety
clearance