PULSAR MEASUREMENT
65
Special Devices (P700 =5)
Point of Measurement
The transducer must be above the
maximum head P704
by at least the
near
blanking distance P107
.
In the case of a
Palmer Bowlus
flume the point of head measurement
should be
half
the value of
Dim “A” P710
upstream
of the device.
For an
H-Flume
the head measurement is taken at a point
downstream
from the flume entrance as detailed in the table below:
FLUME SIZE-DIM A (P710)
POINT OF MEASUREMENT
cm
feet
cm
inches
15.25
0.5
4.7
1.88
23.00
0.75
6.7
2.69
30.05
1.0
9.1
3.63
45.70
1.5
13.5
5.378
61.00
2.0
17.9
7.19
76.20
2.5
22.5
9.00
91.45
3.0
27.2
10.88
137.15
4.5
40.5
16.19
Transducer mounted
Min. blanking distance (P107)
above max. head
Point of Measurement
See table below
FL
O
W
(q
)
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