VEGA VEGAWELL 52 4 … 20 mA_HART Pt 100 - Manual (Page 27)

? 4 … 20 mA signal not stable
l L evel fluctuations
à Adjust integration time via PACTware
l
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
l C onnection to voltage supply wrong
à Check connection according to chapter "Connection steps"
and if necessary, correct according to chapter "Wiring plan"
l N o power supply
à Check cables for breaks; repair if necessary
l O
perating 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 the instrument or send it in for repair
I n Ex applications, the regulations for the wiring of intrinsically safe
circuits must be observed.
D epending on the reason for the fault and the measures taken, the
steps described in chapter "Set up" may have to be carried out again.
8 .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 52 • 4 … 20 mA/HART Pt 27
8 M aintenance and fault rectification
35402
-
EN
-111021