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PTFM 1.0 Portable Transit Time Flow Meter
FIELD TROUBLESHOOTING
Possible Causes:
Corrective Action:
METER READING WHEN THERE IS NO FLOW?
Erratic measurement (set damping to 0% to check) due
to electrical noise or poor signal quality.
Set
Calibration
/
Damping
to
5%
with
zero flow use
Setup
/
Tare
function.
Try adjusting transducer spacing (+/- 10%) and
contact Greyline for further assistance.
Adjust
Calibration
/
Min Flow
setting.
Variable Speed Drive interference
Follow Drive manufacturers wiring and
Grounding instructions
Relocate Flowmeter, Transducers and wiring
away from VSD
Transducer cable connections incorrect or loose
Disconnect and reconnect transducer cables
ensuring that cable plugs are properly inserted
into terminals and tightened.
METER READING LOWER THAN EXPECTED?
Calibration Error
Review calibration menu. Pipe dimensions and
fluid selection/fluid velocity.
Lower flow rate than expected
Investigate pump/valves. Compare velocity
with alternate instrument.
Erratic measurement (set damping to 0% to check) due
to electrical noise or poor signal quality.
Try adjusting transducer spacing (+/- 10%) and
contact Greyline for further assistance.
NO ECHO INDICATION (Icon: No Echo)?
Transducer Connections
Check transducer connections at PTFM
Transducers not mounted to Pipe or mounted
improperly
Apply coupling compound and mount
transducers to pipe with proper transducer
spacing.
Empty pipe or partially filled
Pipe must be fluid filled and acoustically
transparent in order to obtain echoes.
