20
D:
When the zero point is unstable.
START D
Check detector
Is detector working?
YES
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Troubleshooting
Valve leaking?
Stop leak or
change valve
Turn off the mains and
turn it on again after 10
seconds or more.
Readjust from the START
Measuring pipe fully
filled with liquid?
Arrange the pipe to be fully filled with the
liquid. Bottom to top flow direction is
preferable. Pay attention for top to bottom
flow and horizontal piping.
Pressure fluctuation or vibrations
due to the pump?
Stop the flow completely by closing
both upstream and downstream
valves especially for the small size
applications
Bubbles contained in
the liquid?
Eliminate the bubbles by
flushing or install a defoamer
Heavy electrical equipment
such as pump, motor,
transformer used nearby?
Check for any effect of
induction noise. Shield and
isolate the wiring.
BNC connectors
connected securely?
Connect BNC
connector properly
Are foreign materials
adhered?
Remove the foreign
materials
Contact Technical Support
Specialist when causes are
not determined
Summary of Contents for PFM1 Series
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