ONICON F-3100 Series - Manual (Page 13)

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F-3100 Flow Meter Manual 06/14 - 0670-7
Page 13
3.1.1 General Guidelines
When properly installed, the flow meter will only measure flow associated with that
portion of the piping system for which the flow 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 flow meters are inherently bi-directional and changes in flow 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 flow direction during
the installation process. The sign of the flow rate is positive when the flow direction is
from – to + as printed on the tag plate as shown below. Prior to installation, determine the
direction of flow in the piping system and orient the meter accordingly.
i
IMPORTANT NOTE
Flow direction is indicated by polarity symbols (+/-) and flow totals are accumulated separately
based on direction. The polarity of the flow indication may be reversed by reversing the polarity of
the Ka coefficient.
IMPORTANT NOTE
The F-3100 remote mounted transmitter option is provided without a pre-amplifier. As a result,
the maximum distance it can be located away from the sensor body is limited to 65ft. A remote
transmitter option with a pre-amplifier is available with the F-3200 advanced transmitter. With this
model the remote transmitter may be located up to 1640ft away from the sensor body.
Contact ONICON if you need to locate the remote transmitter more than 65ft from the sensor body.
i
FLOW DIRECTION
-
+
3.1.3 Remote Mounted Transmitter
Find an easily accessible location where wire connections can be made and meter readings
can be taken from floor level. Mount the transmitter on a vibration free surface. Avoid
locations that contain electric motors or other strong sources of electrical interference.