VEGA VEGAWELL 72 4 … 20 mA_HART - Manual (Page 29)

? 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"
l
N
o voltage supply
à Check cables for breaks; repair if necessary
l
supply voltage too low or load resistance too high
à Check, adapt if necessary
? C
urrent signal 3.6 mA; 22 mA
l
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 Shorten suspension cable
T he suspension cable can be shortened individually. For the
version with plastic or stainless steel housing proceed as
follows:
1 U
nscrew the housing cover
2 L oosen the screw terminals and remove the wire ends of
the suspension cable out of the screw terminals
3 H
old the hexagon on the screwed socket with SW 46 and
loosen with seal screw SW 22
Caution:
S
eal screw is secured with Loctide pink, mote breakaway
torque!
Reaction after fault rec-
tification
VEGAWELL 72 • 4 … 20 mA/HART 29
8 M aintenance and fault rectification
27630
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EN
-080806