Pulsar MicroFlow-i, Instruction Manual

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Page 19
Chapter 3 Locating the MicroFlow-i sensor
For optimum accuracy install the MicroFlow-i where the flow is not turbulent.
An ideal location for the sensor is in the centre of a long straight channel.
Vertical drops, baffles, curves or junctions can cause the velocity profile to be
distorted.
To obtain optimum results in velocity readings, the MicroFlow sensor requires
surface ripples to be present to provide a reliable measurement. If there are not
any surface ripples within the sensors field of view under ant flow conditions,
then an alternative measurement point should be found, or ripples created.
Locating the MicroFlow-i
•
If the width of the channel exceeds 1.5m. Multiple MicroFlow-i sensors
are required to be used in conjunction with the Ultimate Controller with
firmware version 1.5.2 and later.
•
When a level measurement transducer is used and mounted on the same
bracket as the
MicroFlow-i . Take into account, the ‘blanking’ distance of
the transducer when mounting the bracket for the application.
•
Ensure that there is an unobstructed path between the sensor and the surface
of the moving liquid being measured.
•
Position the sensor at a height of 250mm above maximum liquid level or up
to two times the channel width from the minimum liquid level, whichever is
greater. As shown in Fig.8 below:
•
A = Minimum 250mm above Maximum Liquid level.
•
B = Maximum 3m above Minimum Liquid Level.
Important Information
If the maximum water height exceeds 2x width of the channel OR
If the maximum water height in channel is less than 50% of the
width of the channel. Please consult Pulsar product support for
assistance.
Fig.8
B
A
Max Liquid
Level
Min Liquid
Level
MicroFlow