Tecfluid CU Series - Manual (Page 44)

44
14 TROUBLESHOOTING
14
TROUBLESHOOTING
Problem Probable cause Solution
The display shows an error
informative message
instead of the default
screen
The pipe is not completely
full.
Make sure that the pipe is completely
full, for example, installing the
flowmeter in a vertical pipe with
upwards flow.
The transducers are not at
the correct distance.
Enter the installation menu and verify
that all parameters are correct. Check
that the transducers are at the
theoretical distance.
There is not gel in the
transducers. Put acoustic adaptation gel on the
base of each transducer.
The pipe surface is not
adequate.
Dirty or rusty surfaces can difficult the
transmission of ultrasonic waves.
Clean the pipe.
Cables are broken or
disconnected. Check the cables between the
converter and the transducers.
The flow rate is unstable
The product contains solid
particles in suspension. Verify that the flowmeter is suitable for
this application.
The product contains air.
Verify that the flowmeter is suitable for
this application.
There are excessive
turbulences.
Verify that the transducer installation
has been made according to the
recommended straight pipe
requeriments (paragraph 5.1 page13).
The instrument displays a
value when there is not
flow
The offset is not adjusted.
Perform an offset adjustment
(paragraph 6.4.4 page 28).
The displayed flow rate is
higher than expected The pipe is not completely
full.
Make sure that the pipe is completely
full, installing the flowmeter in a in a
vertical pipe with upwards flow.
Display is blank Blown fuse.
Change the fuse.(paragraph 10.1
page 33).
The analog output
provides always 4 mA or Current output range not
properly programmed. Program the range properly
(paragraph 6.5.4 page 30).
The analog output gives
always 0 mA
Cable disconnected. Check the cable connection.
The flow rate is negative
(with respect to the fluid
direction). Program the positive flow rate
direction according to the flow
direction (paragraph 6.4.2 page 27).
The totalizer action is
programmed to do it. Change the totalizer programming
(paragraph 6.7 page 30).
The totalizer does not
change its value