Badger Meter Positive Displacement - Manual (Page 7)

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contaminants, then filtering should be installed. If plugging is
repeatedly caused by particle build up, then review the cleaning
and maintenance procedures in the following section. Because of
the vast differences in fluid types and in-plant procedures, there
may be some trial and error involved in determining the ideal
flushing or cleaning regimen.
A calibration factor (K-factor) is established at the factory on a
preferred calibrating fluid. This number is usually accurate for a
wide variety of fluids and should not usually be changed. It is
provided with the meter either on a Calibration Data Sheet or on a
tag attached to the meter. Should it be lost, a copy can be
obtained from the factory. A calibration verification procedure is
detailed later in this document.
Storage - when the flow meter is idle or stored for any extended
period of time, the internals should be thoroughly cleaned with
the appropriate solvent, lubricated with a light oil and the ports
capped or plugged to prevent drying.