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F-3100 Flow Meter Manual 11/17 - 0670-9 Page 13
3.1.1 General Guidelines
When properly installed, the ow meter will only measure ow associated with that
portion of the piping system for which the ow measurement is being made. Choose the
location with the longest straight unobstructed run of pipe, keeping in mind that in some
applications it may be possible to locate the meter in either the supply or return pipe.
3.1.2 Flow Direction
F-3100 ow meters are inherently bi-directional and changes in ow direction are
indicated by a change in polarity of the sensing signal. In order for the meter to display
the correct polarity, it is necessary to orient the meter relative to ow direction during
the installation process. The sign of the ow rate is positive when the ow direction is
from – to + as printed on the tag plate as shown below. Prior to installation, determine the
direction of ow in the piping system and orient the meter accordingly.
IMPORTANT NOTE
Flow direction is indicated by polarity symbols (+/-) and ow totals are accumulated separately
based on direction. The polarity of the ow indication may be reversed by reversing the polarity of
the Ka coefcient.
IMPORTANT NOTE
The maximum distance between the transmitter and sensor body is 65ft. Contact ONICON if the
transmitter needs to be more than 65ft from the sensor body.
3.1.3 Remote Mounted Transmitter
Find an easily accessible location where wire connections can be made and meter readings
can be taken from oor level. Mount the transmitter on a vibration free surface. Avoid
locations that contain electric motors or other strong sources of electrical interference.
Flow in this direction will display
as positive on the LCD display.
Flow in this direction will display
as negative on the LCD display.
FLOW DIRECTION
+
FLOW DIRECTION
FLOW DIRECTION
+
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