Omega FLR 1000, User Manual

Page: 9 / 33

pg. 9 of 33
The flow direction for the sensor is clearly marked on the label. Do not
reverse the flow direction or the unit will not function.
Close Up of Label Showing Flow Direction
(FLR 1000 shown, other models similar)
For the best results precautions should be taken to minimize the amount
of turbulence in the flow stream. Avoid valves, fittings, curves in the tube,
changes in the internal diameter or any other restrictions close to the inlet
of the sensor. The tubing ID should be as large as possible and preferably
not smaller than the ID of the fittings installed on the sensor.
For 0.2-2.0 L/min units a 10 cm straight length of tube before the sensor
is recommended. For higher flow range units (0.5-5.0 L/min and 1.0-10.0
L/min), a 20 cm straight length of tubing before the sensor is
recommended. If this is not possible it is recommended that straight
lengths between all connections on the inlet side of the sensor are as long
as possible and 90 degree fittings (with a large enough ID) are used
instead of curves in the tubing.
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
The FLR 1000 series of flow sensors and flow meters provide a 0-5VDC, or
4-20mA, or 0-5VDC and pulse output proportional to the flow rate. This
output may be connected to a display, data acquisition system or
voltmeter / current meter.