Troubleshooting - Tecfluid FLOMID Series Instruction Manual

17

TROUBLESHOOTING

Problem
The screen shows
empty pipe
The flow rate is unstable
The flow rate displayed
is 0
The instrument displays
a value when there is not
flow
The displayed flow rate
is higher than expected
Display is blank
The analog output gives
always 4 mA or 20 mA
The analog output gives
always 0 mA
The invalid current
message appears
Probable cause
Pipe is empty
The functional earth is not
connected
Isolation of the electrodes
Electrode cable disconnected
Liquid with very low conductivity
Dirt on the electrodes
The product contains air or non-
conductive particles in suspension
Coil cable disconnected
The flow rate is smaller than
programmed as CUT OFF
The sensor is damaged due to
electrodes corrosion
The functional earth is not
connected and the empty pipe
option is OFF
The electrodes are immersed but
the pipe is not completely full
Blown fuse
Current output range not properly
programmed
Cable disconnected
Insufficient current from the power
supply
Solution
Make sure that the pipe is
completely full, for example,
installing the flowmeter in a vertical
pipe with upwards flow
Connect the functional ground of
the flowmeter to a metallic point of
the installation in contact with the
liquid
Clean the sensor electrodes
Connect the cable between the
sensor and the electronic converter
The flowmeter is not adequate for
the application
Clean the sensor electrodes
Verify that the flowmeter is
adequate for this application
Connect the cable between the
sensor and the electronic converter
Decrease the value of the cut off
(see page 35)
Electrode material not adequate for
the liquid
Connect the functional ground of
the flowmeter to a metallic point of
the installation in contact with the
liquid
Make sure that the pipe is
completely full, for example,
installing the flowmeter in a vertical
pipe with upwards flow.
Change the fuse
Program the range properly (see
page 39)
Check the cable connection
Change the power supply
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