Faults - WIKA DiwiTherm TR75 Betriebsanleitung

7. Maintenance and cleaning / 8. Faults
7.2 Cleaning
CAUTION!
Before cleaning, correctly disconnect the instrument from the pressure supply,
■
switch it off and disconnect it from the mains.
EN
Clean the instrument with a moist cloth (soap water).
■
Electrical connections must not come into contact with moisture.
■
Wash or clean the dismounted instrument before returning it, in order to
■
protect personnel and the environment from exposure to residual media.
Residual media in dismounted instruments can result in a risk to persons, the
■
environment and equipment.
Take sufficient precautionary measures.
For information on returning the instrument see chapter 9.2 "Return".

8. Faults

Faults
The battery has less than
2.7 V
Error message
No signal/ line break
Display of measured value
jumps
Erroneous measured values
and response times too long
Erroneous measured values
and response times too long
Corrosion
20
Causes
The battery has less than 2.7 V
Mechanical load too high or
overtemperature
Cable break in connecting
cable or loose contact caused
by mechanical overload
Wrong mounting geometry, e.g.
mounting depth too deep or
heat dissipation too high
Deposits on the sensor or
thermowell
Composition of the medium
not as expected or modified
or wrong thermowell material
selected
WIKA operating instructions DiwiTherm
Measures
Contact the manufacturer
Replacement of the sensor
or the measuring insert with a
suitable version
Replacement of the sensor or
measuring insert with a suitable
design, for example a thicker
conductor cross-section
The temperature-sensitive area
of the sensor must be inside
the medium, and surfaces
measurements must be
ungrounded
Remove deposits
Analyse medium and then
select a more-suitable material
or replace thermowell regularly
, model TR75
®