P-39 enter option "4", display flowrate
P-40 enter option "4", universal head vs. flow
press display will show
or enter
*H-1
ALT. DISP. ----
00
ENTER 0.000
↑ H-2
----
ENTER 0.300
↑ H-3
----
ENTER 0.600
↑ H-10
----
2.7 2.7
ENTER 2.700
↑ H-11
----
33
ENTER 3.000
Example 6b
The application is to measure the flow across a 4 ft. rectangular weir with end
contractions. The flow is characterized by the following formula:
cfs = 3.33 (L - 0.2H) H
1.5
select:
P-1 enter option "3", units in feet
advance to:
P-2 enter option "5", OCM
P-3 enter "4", empty distance to transducer
P-4 enter "3", span
P-5 enter "1" near blanking distance
where cfs = flow in cu ft/sec
L = length of crest
H = head
PL-399 6 – 42
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