VEGA VEGABAR 74 4 … 20 mA_HART - Manual (Page 25)

à Check the pressure compensation in the housing and
clean the filter element, if necessary
? 4 … 20 mA signal missing
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W rong 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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N
o 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
? C urrent signal 3.6 mA; 22 mA
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electronics module or measuring cell defective
à Exchange instrument or return instrument for repair
I
n Ex applications, the regulations for the wiring of intrinsically
safe circuits must be observed.
D
epending on the failure reason and measures taken, the
steps described in chapter "Set up" must be carried out again,
if necessary.
8 .3 Instrument repair
I f a repair is necessary, please proceed as follows:
Y ou can download a return form (23 KB) from the Internet on
our homepage www.vega.com under: "Downloads - Forms
and certificates - Repair form".
B
y doing this you help us carry out the repair quickly and
without having to call back for needed information.
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P rint and fill out one form per instrument
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C
lean the instrument and pack it damage-proof
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A ttach the completed form and, if need be, also a safety
data sheet outside on the packaging
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P lease ask the agency serving you for the address of your
return shipment. You can find the respective agency on our
website www.vega.com under: "Company - VEGA world-
wide"
Reaction after fault rectifica-
tion
VEGABAR 74 - 4 … 20 mA/HART 25
M aintenance and fault rectification
28432
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EN
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