VEGA VEGADIS 12 - Manual (Page 21)

? 4 … 20 mA signal not stable
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Level fluctuations
à Adjust integration time via PACTware™
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no atmospheric pressure compensation
à Check the capillaries and cut them clean
à Check the pressure compensation in the housing and
clean the filter element, if necessary
? 4 … 20 mA signal missing
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Wrong connection to power supply
à Check connection according to chapter "Connection
steps" and if necessary, correct according to chapter
"Wiring plan"
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No voltage supply
à Check cables for breaks; repair if necessary
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supply voltage too low or load resistance too high
à Check, adapt if necessary
? Current signal 3.6 mA; 22 mA
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electronics module or measuring cell defective
à Exchange instrument or return instrument for repair
In Ex applications, the regulations for the wiring of intrinsically
safe circuits must be observed.
Depending on the failure reason and measures taken, the
steps described in chapter "Set up" must be carried out again,
if necessary.
7.3 Instrument repair
If a repair is necessary, please proceed as follows:
You can download a return form (23 KB) from the Internet on
our homepage www.vega.com under: "Downloads - Forms
and certificates - Repair form".
By doing this you help us carry out the repair quickly and
without having to call for needed information.
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Print and fill out one form per instrument
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Clean the instrument and pack it damage-proof
Reaction after fault rectifica-
tion
VEGADIS 12 21
Maintenance and fault rectification
20591
-EN
-071128