PULSAR MEASUREMENT
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Example 3 BS3680 Rectangular Weir
In this example, it is required to calculate to the flow through a BS3680
Rectangular weir. Absolute calculation will be used, and there is a
requirement for an alarm to indicate a high flow condition to be set to relay
3. The flow rate is required to be displayed in litres/minute and the totaliser
is to record the flow in cubic metres, the resettable totaliser is to be
displayed during RUN.
This application is to be assigned to point 1 (Transducer 1).
The distance from the end of the transducer horn to
zero
flow (
P105
) is 40
inches and
max head
(
P704
) is 16 inches,
maximum flow
(
P705
).
Approach
width
(
Dim “A”
)
P710
= 18.0 inches
Crest width
(
Dim “B”
)
P711
= 12.0 inches
Crest Height
(
Dim “C”
)
P712 =
10.0 inches
