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INSTALLATION, CONNECTIONS, and OPERATION
Mounting. The FMG210/220/230 can be supported by
its piping connections if the piping is rigid and there is no
vibration. Alternatively, the grounding studs can be used
for mounting by inserting them through pre-drilled holes.
Note the centerline distance in the dimensional drawing
on following page.
OPERATION
The newly-installed meter takes from a few seconds to a
minute for the signal to stabilize at startup, especially if it
has been dry. In normal operation, keep the meter filled with
fluid to prevent this delay. An empty pipe detection feature
will normally detect absence of liquid in the pipe and register
zero flow when the meter is mounted properly.
The 4-20 mA signal outputs 4 mA at zero flow and 20
mA at maximum rated flow. The standard pulse signal
is a 50% duty cycle pulse set at 1000 pulses/liter (3785
pulses/gallon).
CAUTION: Although this meter has an
empty pipe detection function,
under certain conditions of empty or
partially-full pipe the meter may read
a flow when there is none. If this is a
hazardous condition, mount the meter in such a way
as to ensure the meter will always be full of liquid.
INSTALLATION
Piping. Metallic pipe or tube, or plastic tubing, can be used
with the meter. The meter comes with male NPT or barb
fittings (see chart, next page, for sizes).
For plastic tubing, use female NPT tubing adaptors. In
installations exposed to vibration, it is not recommended to
use the piping as the sole support for the meter, particularly
on the smaller sizes.
A minimum of 1” of straight pipe run is recommended on
the inlet side of the meter. Straight run is not necessary
on the outlet.
CONNECTIONS
Power and signal connections are provided by the single
4- or 6-conductor color-coded cable. See the Wiring
Connections chart on next page. In addition, it is necessary
for proper operation to ground the unit to a good quality
earth ground. Use the 12 ft. grounding wire supplied with
the unit, or if necessary, a longer wire attached to one or
both of the grounding studs. If metal piping is used, ground
connections from the grounding studs on the bottom of the
unit to both inlet and outlet pipes provide the best results
in metering accuracy. See Grounding diagrams.