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14063434.02 10/2019 EN/DE
WIKA operating instructions transmitter, models GDT-20, GDHT-20
EN
7. Maintenance and cleaning / 8. Faults
7.1 Maintenance
The transmitters are maintenance-free.
Repairs must only be carried out by the manufacturer.
7.2 Cleaning
CAUTION!
■
Before cleaning, correctly disconnect the transmitter from the pressure
supply, switch it off and disconnect it from the voltage supply.
■
Clean the instrument with a moist cloth.
■
Electrical connections must not come into contact with moisture.
■
Wash or clean the dismounted instrument before returning it, in order to
protect persons and the environment from exposure to residual media.
■
Residual media in the dismounted transmitter can result in a risk to persons,
the environment and equipment. Take sufficient precautionary measures.
■
Do not use any pointed or hard objects for cleaning, as they may damage
the sensors.
For information on returning the instrument see chapter 9.2 “Return”.
8. Faults
In the event of any faults, first check whether the transmitter is mounted correctly, mechani
-
cally and electrically.
Faults
Causes
Measures
Gas density value decreases
steadily
Leaks in the gas compartment
Check mechanical mounting of
the transmitter
Search for leaks with leak detec-
tor e.g. GIR-10
No communication via
Modbus
Electrical connection not correct
Configuration error
Check wiring and power supply
Query via WIKA startup kit
High humidity values with
tendency to dry
Typical time response after
installation
Measuring values stabilise after
some time, see chapter 6.1
CAUTION!
If faults cannot be eliminated by means of the measures listed above, shut down
the transmitter immediately, and ensure that pressure and/or signal are no longer
present, and secure the instrument from being put back into operation inadvertently.
In this case, contact the manufacturer.
If a return is needed, please follow the instructions given in chapter 9.2 “Return”.
9. Dismounting, return and disposal
