WIKA 53 Series Operating Instructions Manual page 14

7. Commissioning, operation
EN
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.
-40 ... +200 °C.
Thermo-
well
16
The working temperature of the thermal compound is
CAUTION!
Do not fill hot thermowells. There is a risk of the oil
spraying out!
Stem
Required
safety
clearance
WIKA operating instructions models 53, 54, 55 (ATEX)
loosening
Make sure to loosen the
screws on the opposite side
as well!
CAUTION!
When using a thermowell, make
sure 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.
(For the formula for the
calculation of the insertion
length l1, see the respective
thermowell's data sheet)