VEGA VEGABAR 55 4 … 20 mA User Manual
Page 37
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7 Maintenance and fault rectification
VEGABAR 55 • 4 … 20 mA
36733-EN-130321
Error code Cause
Rectification
4 … 20 mA
signal not
stable
Level fluctuations
– Set the integration time via the
display and adjustment module or
PACTware
No atmospheric pres-
sure compensation
– Check the pressure compensation
in the housing and clean the filter
element, if necessary
4 … 20 mA
signal miss-
ing
Connection to volt-
age supply wrong
– Check connection according to
chapter "Connection steps" and
if necessary, correct according to
chapter "Wiring plan"
No power supply
– Check cables for breaks; repair if
necessary
Operating voltage
too low or load resist-
ance too high
– Check, adapt if necessary
Current sig-
nal greater
than 22 mA
or less than
3.6 mA
Electronics module
or measuring cell de-
fective
– Exchange the instrument or send it
in for repair
In Ex applications, the regulations for the wiring of intrinsically safe
circuits must be observed.
Error code Cause
Rectification
E013
no measured value
available
6)
– Exchange the instrument or send it
in for repair
E017
Adjustment span too
small
– repeat with modified values
E036
no operable sensor
software
– Carry out a software update or send
instrument for repair
E041
Hardware error
– Exchange the instrument or send it
in for repair
Depending on the reason for the fault and the measures taken, the
steps described in chapter "Set up" may have to be carried out again.
7.3 Calculation of total deviation (according to
DIN 16086)
The total deviation F
total
according to DIN 16086 is the sum of basic
accuracy F
perf
and longterm stability F
stab
. F
total
is also called maximum
practical deviation or utility error.
F
total
= F
perf
+ F
stab
F
perf
= √((F
T
)
2
+ (F
Kl
)
2
)
With the analogue signal output there is also the error of the current
output F
a
.
Error messages via the
display and adjustment
module
Reaction after fault recti-
fication
Total deviation
6)
Fault message can also appear if the pressure is higher than the nominal
range.