ONICON F-5100 Insertion - Manual (Page 32)

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F-5100 Insertion Thermal Mass Flow Meter Manual 05/15 - 0663-20 / 18333 Page A-5
Cleaning the Sensor Assembly
Note, in some cases, contamination of the sensor is the only cause of the
additional heat transfer during the “no flow” test. Remove the sensor, and
clean the sensor (use an appropriate non-corrosive solvent to remove the build-up). A soft brush can
be used to gently clean the sensing surface, using caution to avoid damaging the sensor elements.
Once clean, re-install the sensor as per the instruction manual.
Contact ONICON Service for assistance if the mW readings differ by more than ± 10mW.
CLIMATE ACTION RESERVE LANDFILL PROJECT PROTOCOL VER. 4.0 JUNE 29, 2011
ONICON’s zero flow calibration test complies with the requirements of section 6.2 for field checking
the flow sensor for calibration accuracy. Percent drift can be determined by multiplying the mW
change from factory value (see 2) by 1.0% (i.e. each mW change equals 1% drift).
The Climate Action Reserve is a national offsets program working to ensure integrity, transparency
and financial value in the U.S. carbon market. It does this by establishing regulatory-quality
standards for the development, quantification and verification of greenhouse gas (GHG) emissions
reduction projects in North America.