Yokogawa ADMAG AXF - Manual (Page 60)

IM 01E20D01-01E 5-11
5. MAINTENANCE
5.8 Troubleshooting
Although magnetic flowmeters rarely require maintenance, failures may occur when the
instrument is not operated correctly. This section describes troubleshooting procedures
where the cause of the breakdown is identified through receiver indication.
5.8.1 No Indication
Is an error being displayed? Check the converter display.
NO
YES
NO
NO
YES
NO
YES
NO
Is an error being
displayed?
Is anything else
being displayed?
YES
YES
Check whether the flowtube
is filled with fluid.
Is the flowtube
full of fluid?
Remove the tube and
inspect the inside of the pipe.
Is foreign
matter adhering to
the walls?
Does the
arrow on the tube match the
flow direction?
Refer to the “Alarm Functions” in
the AXFA11, AXFA14, and AXF
Integral Flowmeter [Software
Edition] user manuals.
Perform either of the following:
a. Reinstall the flowtube in
order to make the arrow and
flow direction match.
b. Reverse the setting for the
flow direction.
Change the piping or the
mounting condition so that
the tube fills with the fluid.
Remove the foreign matter.
START
Contact a service center.
Check the resistance between
the flowtube’s A, B, and C
terminals using a multimeter.*
1
Is the
resistance 100 M ⍀ or more
in each case?
NO
YES
F0521.EPS
*1: Refer to Section 5.7 for how to check
the resistance of the remote type
flowtube. The integral flowmeter's
resistance cannot be checked.