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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 sensor 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, Sensors and wiring away
from VSD
Sensor cable connections incorrect or loose
Disconnect and reconnect sensor 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 sensor spacing (+/- 10%) and
contact Greyline for further assistance.
NO ECHO INDICATION (Icon: No Echo)?
Sensor Connections
Check sensor connections at PTFM
Sensors not mounted to Pipe or mounted improperly
Apply coupling compound and mount sensors
to pipe with proper sensor spacing.
Empty pipe or partially filled
Pipe must be fluid filled and acoustically
transparent in order to obtain echoes.
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