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TO GET ASSISTANCE, CALL: 919-774-7667
ZENITH PUMPS
Feedback Control by Using a Flowmeter with Frequency Signal
(cont’d)
5. Result:
• The output from the pump will be controlled by the flowmeter
• The units of the setpoint and the Tach are same as the unit of F
m
6. IMPORTANT NOTE:
• The unit of the setpoint is in (cc/min), and no longer in (RPM)
• The pump speed may vary at very wide range. Do not to exceed the factory suggested
speed limit
• Any restriction at the discharge side of the pump can rapidly increase the speed of
pump. This is the major causation making the pump over-speed. Check any down-stream
restrictions before the operation.
• Always test the system without any down-stream restrictions. Gradually increase the
restrictions, and monitor the speed of the pump closely, to make sure not to over-run
the pump
• The operation can make the pump runs at very high speed. You should test your sys-
tem for safety under all potential conditions. Failure to do so can result in damage to
the equipment and/or serious injury to personnel
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