Endress+Hauser promag 31, Operating Manual

Page: 40 / 60

5.2 Instructions for fault location and remedies
Note!
This instruction is only for the custody transfer meter Promag 31!
Please contact the E+H service for the fiscal measurement system.
During manufacture all units pass through various stages of quality control.
The last inspection is wet calibration, which is carried out on a calibration rig
designed according to the latest state of the art.
As an initial help in the location of faults, here is an overview of possible causes of
faults:
Is the supply voltage present at terminals,
1, 2?
No
Check that connections conform to wiring
diagrams.
Yes
Is the fuse in the terminal compartment
in order?
No
Replace fuse.
Yes
Is the status output set to “Signalling
system and process errors”?
No
Turn switch No. 2 “OFF” (see page 33).
Yes
Does the status output have a high
impedance?
(Open collector = not conducting)
ERROR segment = visible?
No
No system or process error is present:
•
Check the connections to the outputs.
•
Check the parameter settings,
i.e. switch positions (see page 33).
Yes
Does the status ouput have a low
impedance when a voltage of 3
…
30 V DC
is applied to the auxiliary input? Auxiliary
input has previously been set for measured
value suppression (see page 36 and 37). No
There is a system error:
Please contact Hauser Service
Organisation!
Yes
There is a process error:
•
“Overflow” segment visible:
Measuring range exceeded >12.5 m/s.
Reduce the flow.
•
“ERROR” segment visible:
Measuring pipe not completely filled.
Check the process conditions of the
installation.
5. Fault Location and Remedies Promag 31
40 Hauser