Pulsar Measurement FlowCERT, Инструкция по эксплуатации

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FLOWCERT LITE (UL) INSTRUCTION MANUAL
56
U-Throated Flume
Absolute
If the flow calculation is to be absolute P702 = 1 the flow will be calculated
using the formula: q = (2/3)
1.5
g
n
0.5
C
u
C
v
C
d
bh
1.5
Where:
q = flowrate
g
n
= gravitational acceleration (nominal value = 980.66 cm/s 2 )
h = head
C
u
= shape coefficient calculated by FlowCERT Lite (P724)
C
v
= velocity coefficient calculated by FlowCERT Lite (P721)
C
d
= discharge coefficient calculated by FlowCERT Lite (P722)
b = throat width P711
Ratiometric
If the flow calculation is to be ratiometric P702 = 2 the flow will be
calculated using the formula:
q= q
cal
(C
v
/C
vcal
)(C
d
/C
dcal
)(C
u
/C
ucal
)(h/h
cal
) 1.5
Where:
q = flowrate
q
cal
= flowrate at maximum head P705
Cv = velocity coefficient calculated by FlowCERT Lite (P721)
Cv
cal
= velocity coefficient at maximum head
Cd = discharge coefficient calculated by FlowCERT Lite (P722)
Cd
cal
= discharge coefficient at maximum head
Cu = shape coefficient P724
Cu
cal
= shape coefficient at maximum head
h = head h
cal
= maximum head P704