Hoffer Flow Controls MF SERIES, User Manual

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Operation 9
HP-210
2 Operation
2.1 Principle
The Hoffer MF Series has been developed to meet the need for a
low flow measurement device for use with low to moderate
viscosity clean liquids and for gas measurement applications.
The MF Series is a family of low flow rate measurement devices
whose design is based on a Pelton Wheel-like rotor. The measured
fluid is directed tangentially through a velocity nozzle against the
rotor causing it to spin. The pickup coil senses the spinning
motion of the rotor through the housing and converts it into a
pulsing electrical signal. Summation of the pulsing electrical
signal relates directly to the total flow, while the frequency is
related to the flow rate.
2.2 Precautions

Do not drop the meter. Dropping the meter may result in damage
to the meter housing and/or internals.

Do not operate the meter at flowrates greater than the maximum
flowrate marked on the meter. Operating at flowrates greater than
the maximum flowrate may over-spin the meter. Over-spinning
may result in damage to the meter.
CAUTION
: Avoid over-spinning the meter. Over-spinning the meter may
result in damage to the meter internals and lead to meter
failure.