59
8 Diagnostics and service
WEIGHTRAC 31 • 4 … 20 mA/HART - four-wire
42374-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
".
8.3 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
Loading fluctua-
tions
Adjust damping via PACTware/DTM
Conveyor belt was
changed
Carry out a zero rate determination
Maintenance
Reaction when malfunc-
tions occur
Procedure for fault recti-
fication
Check 4 … 20 mA signal
(mass flow determina
-
tion)
