5.
Flow meter is not responding to flow.
Check to ensure adequate power is supplied to the flow meter. If things appear to
be correct, perform this functional test before calling ONICON: carefully remove
the probe and sensor from the pipe. Blow on the sensor to see if a response
occurs. If nothing happens, take a damp rag or sponge and place it in contact with
the sensor. A reading should occur. Contact ONICON Customer Service with this
information.
6.
Display and/or 4-20mA signal reading above zero flow when no flow is occurring
in the pipe.
If the reading is less than 5% of full scale, it is likely this is a normal condition
caused by convection flow created by the heated sensor. It does not mean that
the zero of the instrument is improperly set. The ONICON sensor is extremely
sensitive to gas flow and can even read the small flow caused by convection. If
this is an unacceptable condition, please contact ONICON Customer Service for
alternatives.
11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax +1 (727) 442-5699 • sales@onicon.com
F-5500 Thermal Mass Flow Meter Manual 06/17 - 2030 / 107023 Page 84
Model F-5500
TROUBLESHOOTING
Troubleshooting: Alarm Codes
Troubleshooting: Installation Problems
Installation
Problems
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