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F-3100 Flow Meter Manual 06/14 - 0670-7 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 coefcient.

IMPORTANT NOTE

The F-3100 remote mounted transmitter option is provided without a pre-amplier. 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-amplier 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.

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 oor level. Mount the transmitter on a vibration free surface. Avoid

locations that contain electric motors or other strong sources of electrical interference.

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Onicon F-3100 Series Manual do Utilizador Página 13