Vega POINTRAC 31 - 9.4 Exchanging the electronics module

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9 Diagnostics and servicing
POINTRAC 31 • 8/16 mA/HART - four-wire
43388-EN-180322
Therstmeasuresare:
•
Evaluation of fault messages via the adjustment device
•
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rectied.
The following table describes possible faults that may not generate an
error message:
Error Cause Rectication
The instrument signals cov-
ered without being covered by
the measured medium
The instrument signals uncov-
ered while covered with the
measured medium
Voltage supply missing Check cables for breaks; repair if necessary
Operating voltage too low or
load resistance too high
Check, adapt if necessary
Electrical connection faulty Check connection according to chapter
"Connection steps" and if necessary, correct ac-
cording to chapter "Wiring plan"
Electronics defective Change the switching behaviour of the sensors
under "Diagnosis/Simulation". If the instrument
does not switch over, send it in for repair.
Buildup on the inner wall of
the vessel
Remove buildup
Check the Delta I value.
Improve the switching threshold - carry out a
double point adjustment
Current signal greater than
22 mA or less than 3.6 mA
Electronics module in the sen-
sor defective
Note error messages on the display and adjust-
ment module
Depending on the reason for the fault and the measures taken, the
steps described in chapter "Setup" must be carried out again or must
be checked for plausibility and completeness.
Should these measures not be successful, please call in urgent cases
the VEGA service hotline under the phone no.
+49 1805 858550.
The hotline is also available outside normal working hours, seven
days a week around the clock.
Sinceweoerthisserviceworldwide,thesupportisprovidedin
English. The service itself is free of charge, the only costs involved are
the normal call charges.
9.4 Exchanging the electronics module
If the electronics module is defective, it can be replaced by a VEGA
service technician.
WithSILqualiedinstrument,onlyarespectiveelectronicsmodule
withSILqualicationmustbeused.
In Ex applications, only instruments and electronics modules with ap-
propriate Ex approval may be used.
Procedure for fault recti-
cation
Check output signal
Reaction after fault r
ecti-
cation
24 hour service hotline