VEGA MINITRAC 31 4 … 20 mA_HART - four-wire - Manual (Page 69)

69
9 Diagnostics and service
MINITRAC 31 • 4 … 20 mA/HART - four-wire
40447-EN-131119
Code
Text mes-
sage
Cause Rectification
S017
Accuracy
outside the
specification
– Accuracy outside the
specification
– Correct adjustment data
S025
Bad lineariza-
tion table
– Bad linearization table – Carry out linearization
S038
Slave outside
the specifica-
tion
– Slave outside the specifica-
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 first measures are:
•
Evaluation of fault messages, for example via the display and
adjustment module
•
Checking the output signal
•
Treatment of measurement errors
Further comprehensive diagnostics options are available with a PC
with PACTware and the suitable DTM. In many cases, the reasons can
be determined in this way and faults rectified.
Connect a multimeter 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 Rectification
4 … 20 mA signal
not stable
Level fluctuations Set damping according to the instru-
ment via the display and adjustment
module or PACTware/DTM
Maintenance
Reaction when malfunc-
tions occur
Procedure for fault recti-
fication
Check 4 … 20 mA signal
(level measurement)