VEGA VEGAWELL 51 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
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.
7 .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.
Reaction after fault rec-
tification
VEGAWELL 51 • 4 … 20 mA/HART 25
M aintenance and fault rectification
32468
-
EN
-080604