F
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4300 CLAMP
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ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140 Page 75 onicon.com
SECTION 8.0: 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.
•
• Ensure triax cable shield is properly connected to ground.
• Ensure correct power input ground connection.
•
assistance.
•
interference
• Follow drive manufacturers wiring and grounding instructions.
•
incorrect or loose
•
that cable is properly inserted into terminals and tightened.
METER READING LOWER THAN EXPECTED?
Calibration Error •
•
Erratic measurement (set
damping to 0% to check) due
to electrical noise or poor
signal quality.
• Ensure triax cable sensor shield is properly grounded.
• Ensure correct power input ground connection.
•
assistance.
NO ECHO INDICATION ICON: NO ECHO
• Ensure triax cable sensor shield is properly grounded.
• Ensure triax cable is connected to transducers.
or mounted improperly
• Apply coupling compound and mount sensors to pipe with proper sensor spacing.
•
Coupling compound washed
out, or sensor loose on pipe.
• Remount sensor.
•
METER READING HIGHER THAN EXPECTED?
Calibration Error •
•
Erratic measurement (set
damping to 0% to check) due
to electrical noise or poor
signal quality.
• Ensure triax cable sensor shield is properly grounded.
• Ensure correct power input ground connection.
•
assistance.
Pipe not full •
if pipe is not full.
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