dynasonics TFXL, Installation And Operating Instructions Manual

Page: 38 / 44

38
TROUBLESHOOTING GUIDE
Unit does not turn “ON”
when power is applied
•
Verify that voltage in the range of 11-
30 Vdc is present at the field terminals
•
If the voltage is present and neither
LED on the main printed circuit board
is illuminated, return the flow meter to
the Dynasonics factory for evaluation.
Unit reads zero flow when
flow is actually running
•
Verify that the Maximum Flow Rate
value is not set to a very high value
and causing the Flow Cutoff percent
entry to drive the readings to zero.
Decrease Max Flow setting or
decrease Flow Cutoff percentage.
ERROR 0010 is Displayed
on the Screen
•
The flow meter is not mounted onto
the pipe using an acoustic couplant.
•
The acoustic couplant is not uniform
between the flow meter transducer
and the pipe.
•
The liquid contains more than 50%
suspended gas bubbles.
•
The pipe is full of gas—gas locked.
Flow Meter Reads
Negative Flow Readings
•
Flow is running backwards when
compared to the FLOW DIRECTION
arrow located on the side of the flow
meter enclosure.
Flow Meter is Reading
Flow, But Output Is Not
Transmitting
•
Verify that one of the LEDs on the
main printed circuit board is flashing—
if not, return the flow meter to the
Dynasonics factory.
•
Verify connections and polarity of
wiring.
•
Test output with a milliamp meter,
oscilloscope or other test instrument
•
Verify that the output is configured for
RATE (Figure 16)