VEGA VEGAWELL 51 4 … 20 mA - Manual (Page 21)

? 4 … 20 mA signal missing
l
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
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.
6 .3 Shorten suspension cable
S horten the suspension cable individually. Proceed as follows:
1 R
emove the filter adapter from the transparent capillary line
2 C ut the suspension cable with an edge cutter to the
requested length
Caution:
D
o not squeeze the capillary cable, this will influence the
pressure compensation. If necessary, rework with a sharp
knife.
3 R emove approx. 10 cm of the cable mantle, strip off
approx. 1 cm of the wire ends
I
nsert the filter adapter
T
he work steps are finished.
6 .4 Instrument repair
I f a repair is necessary, please proceed as follows:
Y
ou can download a return form (23 KB) from our Internet
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.
Reaction after fault rec-
tification
VEGAWELL 51 • 4 … 20 mA 21
M aintenance and fault rectification
32465
-
EN
-080604