WIKA 891.34.2189 - Manual (Page 14)

GB
11. Storage / 12. Troubleshooting
Defect Possible reason Remedy
No signal output Failure of power supply or wiring
interrupted Check power supply and wiring;
replace defective components
Transmitter miswired Check wiring; if necessary
rectify it
No pressure Check tailpipes
Electronic defect through incor-
rect supply voltage or external
voltage Return transmitter to manufac-
turer for repair
Steady signal, despite pressure
changes Pressure entry blocked Check tailpipes and pressure
entry bore, if necessary clean it
carefully
Electronic defect through incor-
rect supply voltage or external
voltage Return transmitter to manufac-
turer for repair
Transmitter failure through
overpressurisation Return transmitter to manufac-
turer for repair
Steady and excessively high
signal, despite pressure
changes Electronic defect through incor-
rect supply voltage or external
voltage Return transmitter to manufac-
turer for repair
Full span reading too low Supply voltage too low Adjust supply voltage
Load impedance too high Consider permissible max. load
Span adjustment made incor-
rectly Re-calibrate transmitter
Zero signal too low Zero adjustment made incor-
rectly Re-calibrate transmitter
Zero signal too high Zero adjustment made incor-
rectly Re-calibrate transmitter
Transmitter over-pressurised Return transmitter to manufac-
turer for repair
Non-linear signal output despite
correct zero adjustment Transmitter over-pressurised Return transmitter to manufac-
turer for repair
2279453 08/2009 GB/D/F
WIKA Operating Instructions Differential Pressure Transmitter DELTA-trans 14
11. Storage
Before installation, in order to prevent damage to the transmitters, the following
points should be observed:
The pressure transmitter should remain in its original packing until installation.
After taking out the transmitter (e.g. for tests), reuse the original packaging
material.
The storage temperature should not be less than -20 °C or more than +60 °C.
Transmitters should be protected against dust and humidity.
12. Troubleshooting
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