Maintenance And Cleaning; Faults - WIKA TW10-S Mode D'emploi

7. Maintenance and cleaning / 8. Faults

7. Maintenance and cleaning

7.1 Maintenance
In general, thermowells are maintenance-free.
We recommend a visual check of the thermowell for leaks and damages at regular intervals.
Make sure that the seal is in perfect condition!
Repairs should only be carried out by the manufacturer or, following prior consultation, by
correspondingly qualified skilled personnel.
7.2 Cleaning
CAUTION!
Wash or clean the dismounted instrument before returning it, in order to protect staff
and the environment from exposure to residual media.
For information on returning the thermowell see chapter 9.2 "Return".

8. Faults

Faults
Not possible to insert the
temperature sensor into the
thermowell
Leakage of process media
at the connection between
■
the process and the
thermowell
from the interface between
■
the thermowell and the
sensor
In the case of critical installations, we recommend a wake frequency calculation according to
ASME PTC 19.3 TW-2016 or Dittrich/Klotter. This engineering service is offered by WIKA.
WIKA operating instructions thermowells
Causes
Foreign bodies in the thermowell
Damaged or contaminated
thermowell or temperature sensor
fastening thread
Sensor dimension and those
of the inner diameter of the
thermowell do not match
Thermowell or sensor has
been bent or damaged during
installation
Error during installation or
defective seals
Damage, e.g. caused by
operating the thermowell under a
resonant vibration load
Measures
Remove foreign bodies
Clean or recut the thread
Check order documentation
Return for repair
Check the seal, check the
tightening torques
Safe operation of the plant can
no longer be guaranteed
(in the worst case, this might
result in a complete rupture of
the thermowell)
EN
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