Troubleshooting And Repair - Bell VFM60 Series User Introduction Manual

none-explosive environment.
Please make sure the environment the flowmeter in can meet the requirement of the certificate.
When power is wired, please make sure the front and rear cover is closed properly.

9.2 Troubleshooting and repair

Symptom Reason
Power supply failure
Power is not wired
No display
Cable if broken
Wrong wiring
Flow rate is lower than
the meter's lower limit
The flow rate of small
signal cut off function is
too high
Energy threshold value
is too high
Displayed flow rate
is 0 while there are
flow in the pipe
Transmitter function
failure
Sensor is damaged
Pipeline blocked or
sensor jamed.
Power frequency
interference
There is high voltage
instrument or high
The flowmeter has
frequency interference
flow reading while
close to the flowmeter
there is no flow in
the pipe
There is heavy vibration
on the pipe line
Valve is not closed
properly that there flow
leak into the pipe
The gasket and the pipe
are not concentric
The flow rate
reading fluctuate
The flowmeter pipe
significantly
body and the pipe line
are not concentric
Date:24/04/2020
Trouble shooting
Test the voltage on the power
source with a universal meter
Test the voltage on the power
source with a universal meter
Check if there is break off point
on the cable
Check if wiring to the correct
termimal
Increas the flow rate to check
Check the small signal cut off
setting
Check if the Energy threshold
value is too high in spectrum
analyzing checking mode
Replace the transmitter with
another transmiter of same type
to check
Increase the flow rate to check
first, than intall the transmitter
to another flowmeter in same
type to check.
If all above possibilties are
eliminated, please check the
pipe line and installation.
Check the frequency display on
meter is stable at the value that
same as the power frequency
Check if there is high voltage
instrument or high frequency
interference close to the
flowmeter
Sense the vibration on the pipe
line by touch it with hand
Check pressure and check if
valve is closed and sealed
Check the position of the gasket
Check if the flowmeter pipe
body and the pipe line are not
concentric
45 / 59
VFM-60
Vortex Flowmeter
repair
Re-wire the power or use a
new power
Wire the power
Check the cable and
re-wire
Re-wire
Increase the flow rate or
replace a new proper
flowmeter
Set the small signal cut off
to a proper value
Set the Energy threshold
value to a proper value
(Please reference to Note 1
for how to set)
Replace the transmitter
Replace the sensor
Re-install the flowmeter
Re-wire the meter with
sheilded cable according to
requirement.
Re-locate the flowmeter
Tighten the pipeline where
the flowmeter is installed
Repare the valve
Re-install the gasket
Re-install the meter
Rev1.3
User's Manual