WIKA DiwiTherm TR75, Operating Instructions Manual

Page: 20 / 88

11325232.05 09/2016 EN/DE/FR/ES
20 WIKA operating instructions DiwiTherm ® , model TR75
EN
7.2 Cleaning
CAUTION!
■
Before cleaning, correctly disconnect the instrument from the pressure supply,
switch it off and disconnect it from the mains.
■
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 Causes Measures
The battery has less than
2.7 V
Error message
The battery has less than 2.7 V Contact the manufacturer
No signal/ line break
Mechanical load too high or
overtemperature Replacement of the sensor
or the measuring insert with a
suitable version
Display of measured value
jumps
Cable break in connecting
cable or loose contact caused
by mechanical overload Replacement of the sensor or
measuring insert with a suitable
design, for example a thicker
conductor cross-section
Erroneous measured values
and response times too long
Wrong mounting geometry, e.g.
mounting depth too deep or
heat dissipation too high The temperature-sensitive area
of the sensor must be inside
the medium, and surfaces
measurements must be
ungrounded
Erroneous measured values
and response times too long
Deposits on the sensor or
thermowell Remove deposits
Corrosion Composition of the medium
not as expected or modified
or wrong thermowell material
selected
Analyse medium and then
select a more-suitable material
or replace thermowell regularly
7. Maintenance and cleaning / 8. Faults