Vega VEGABAR 54 4 … 20 mA_HART Bedienungsanleitung PDF herunterladen (Seite 43)

8Maintenanceandfaultrectication

VEGABAR 54 • 4 … 20 mA/HART

36726-EN-130321

Error code Cause Rectication

4 … 20 mA

signal not

stable

Leveluctuations – 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lter

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 Rectication

E013 no measured value

available

– Exchange the instrument or send it

in for repair

E017 Adjustment span too

small

– repeatwithmodied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.

8.3 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.

total

= F

perf

+ F

stab

perf

=√((F

)

+ (F

)

With the analogue signal output there is also the error of the current

output F

Error messages via the

display and adjustment

module

Reactionafterfaultrecti-

cation

Total deviation

Fault message can also appear if the pressure is higher than the nominal

range.

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