Pulsar FlowCERT LITE, Instruction Manual

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Page
47
Example 2 BS3680 U-Throated Flume
In this example it is required to calculate to BS3680 the flow through a U-
Throated Flume without any hump. Absolute calculation will be used, and
there is a requirement for an alarm to indicate a low flow condition which
will be set to Relay 1. The flow rate is to be displayed in
millions of US
gallons/hour and the totaliser is also to record the flow in millions of U S
gallons , the resettable totaliser is to be displayed during RUN. The
transducer to be used is a dB3.
The distance from the face of the transducer to zero flow ( P105 ) is 35
inches and max head ( P704 ) is 15 inches, maximum flow ( P705 ) which
will be calculated by the FlowCERT
LITE
as 0.1784 Mil USG/Hour
The dimensions of the flume are as follows:
Approach Channel diameter (
Dim “A”
) P710 = 28 inches
Throat diameter (
Dim “B”
) P711 = 20 inches
Throat length (
Dim “C”
) P712 = 40 inches