Omega FLR 1000, User Manual

Page: 15 / 33

pg. 15 of 33
C. Operation
CAUTION: USE WITH LIQUIDS ONLY. FLOWING GAS OR
AIR THROUGH YOUR LIQUID FLOW SENSOR WILL
DAMAGE THE MICRO-TURBINE ASSEMBLY. THIS TYPE OF
DAMAGE WILL NOT BE REPAIRED UNDER WARRANTY.
1. Start Up
Before applying power to the unit check all tubing and electrical
connections. Once correct installation is verified switch on the power.
2. Entrapped Air or Gas
There may be a lot of air or gas trapped in your sensor after installation.
This will usually escape the unit when flow (within the range of the unit) is
first started.
Caution: The system should be primed with liquid and flow
started gradually. This will prevent trapped air or gas from being
forced through the sensor at a high velocity that may damage
the sensor.
If gas remains entrapped in the unit it may be necessary to elevate the
outlet tubing above the inlet of the unit. This should enable the trapped
gas to escape the unit. The unit may be returned to it’s original position
once all the gas has escaped.
If elevating the outlet tubing does not work, block or pinch the outlet tube
whilst there is flow in the system. After approximately 5 seconds, release
the restriction to allow normal flow. Doing this will build up pressure in the
flow path that when released will help remove the entrapped gas. Repeat
this until the entrapped gas is removed form the unit.
3. Flow Readings
The FLR 1000 Series provide a 0-5VDC, or 4-20mA (I suffix), or 0-5VDC
and pulse output (P suffix) proportional to the flow rate. The type of
output signal is detailed by the part number reference and on the
calibration certificate.
The FLR 1000-D, FLR 1000-BR-D and FLR 1000-ST-D series features an
integral display that provides a local flow reading and a 0-5VDC analog
output.
Each unit is factory calibrated for a specific flow range. The flow range is
shown on the unit’s label and calibration certificate. Units are calibrated
using deionized water as the reference media.