Hoffer Flow Controls CAT3-DC-MIL User Manual page 24

16 Installation
coupled to the pickoff device. The metering section should not be
subjected to excessive vibration or shock. Such a condition may result
in a mechanically induced output signal from the pickoff device.
A strainer, filter and/or air eliminator is recommended to reduce the
potential of fouling or damage. On initial startup of a line, it is
advisable to install a spool piece to purge the line and eliminate damage
to the flowmeter due to flux, tape, solder, welds or other contaminates
carried along by the fluid stream. Once completed, install the
flowmeter and connect cabling to pickup coil.
HP-324-5