Vega MINITRAC 31 - Rectify Faults

67
9 Diagnostics and service
MINITRAC 31 • 4 … 20 mA/HART - four-wire
40447-EN-130430
Code
Text mes-
sage
Cause Rectication
S025
Badlineariza-
tion table
– Badlinearizationtable – Carryoutlinearization
S038
Slave outside
thespecica-
tion
– Slaveoutsidethespecica-
tion
– Check Slave
S125
Ambient tem-
perature too
high/too low
– Ambient temperature too
high/too low
– Protect instrument with
isolating material against
extreme temperatures
The instrument has no status messages to the section "Maintenance".
9.3 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
Therstmeasuresare:
•
Evaluation of fault messages, for example via the display and
adjustment module
•
Checking the output signal with 4 … 20 mA instruments
•
Treatment of measurement errors
FurthercomprehensivediagnosticsoptionsoeraPCwiththesoft-
ware PACTware and the suitable DTM. In many cases, the reasons
canbedeterminedinthiswayandfaultscanberectied.
Connect a handmultimeter in the suitable measuring range according
to the wiring plan. The following table describes possible errors in the
current signal and helps to remove them:
Error Cause Rectication
4 … 20 mA signal
not stable
Leveluctuations Set damping according to the instru-
ment via the display and adjustment
module or PACTware/DTM
4 … 20 mA signal
missing
Electrical connec-
tion faulty
Check connection according to
chapter "Connection steps" and if
necessary, correct according to chap-
ter "Wiring plan"
Voltagesupply
missing
Check cables for breaks; repair if nec-
essary
Operating voltage
too low or load re-
sistance too high
Check, adapt if necessary
Maintenance
Reaction when malfunc-
tions occur
Procedure for fault recti-
cation
Check 4 … 20 mA signal
(level measurement)