Calculation Of Total Deviation (According To Din 16086) - Vega VEGABAR 66 Operating Instructions Manual

Error messages via the
display and adjustment
module
Reaction after fault recti-
fication
Total deviation
VEGABAR 66 • 4 ... 20 mA/HART - climate compensated
Error code Cause
4 ... 20 mA Level fluctuations
signal not
stable
No atmospheric pres-
sure compensation
4 ... 20 mA Connection to volt-
signal miss- age supply wrong
ing
No power supply
Operating voltage
too low or load resist-
ance too high
Current sig- Electronics module
nal greater or measuring cell de-
than 22 mA fective
or less than
3.6 mA
In Ex applications, the regulations for the wiring of intrinsically safe
circuits must be observed.
Error code Cause
E013 no measured value
available
E017 Adjustment span too
small
E036 no operable sensor
software
E041 Hardware error
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.
8.3 Calculation of total deviation (according to
DIN 16086)
The total deviation F
total
accuracy F and longterm stability F
perf
practical deviation or utility error.
F = F + F
total perf stab
F = √((F ) + (F ) )
2 2
perf T Kl
With the analogue signal output there is also the error of the current
output F .
a
Fault message can also appear if the pressure is higher than the nominal
9)
range.
8 Maintenance and fault rectification
Rectification
– Set the integration time via the
display and adjustment module or
PACTware
– Check the pressure compensation
in the housing and clean the filter
element, if necessary
– Check connection according to
chapter "Connection steps" and
if necessary, correct according to
chapter "Wiring plan"
– Check cables for breaks; repair if
necessary
– Check, adapt if necessary
– Exchange the instrument or send it
in for repair
Rectification
– Exchange the instrument or send it
in for repair
9)
– repeat with modified values
– Carry out a software update or send
instrument for repair
– Exchange the instrument or send it
in for repair
according to DIN 16086 is the sum of basic
. F
stab total
is also called maximum
49