Electrical Connections; A) Overview - Omega Engineering FLR 1000 Series User Manual

Close Up of Label Showing Flow Direction
(FLR 1000 shown, other models similar)
The tubing ID should be as large as possible to avoid restrictions and
turbulence. For the best results, a straight length of tubing before the unit
is recommended. This should be 20 times the tubing I.D. or greater
4.

Electrical Connections

Caution: Incorrect wiring may cause severe damage to the unit.
Applying an AC voltage (115VAC or 230VAC) directly to the unit
will cause damage. Read the following instructions carefully
before making any connections.
a) Overview
Omega Engineering flow sensors for gases provide a 0-5VDC output
proportional to the volumetric flow rate. This output may be connected to
a display, data acquisition system or voltmeter. The FLR 1000-D and 1000-
BR-D series feature an integral display that provides a local flow reading.
These units also have a 0-5VDC analog output available. If required, this
may be connected to another display, data acquisition system or
voltmeter.
A stable D.C. power supply is required to operate the unit. The voltage
and current requirements depend on the configuration of the unit. Full
details may be found in the Specification section of this manual.
Connecting wires should be as short as possible to avoid voltage drops.
Twisted 2 pair conductor cable of a suitable gauge should be used if the
length of the power wires is to be longer than 1 meter (3.2 feet).
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