Milltronics OCM II PL-269, Instruction Manual

Page: 47 / 107

P2=2 BS-3680 TRAPEZOIDAL THROATED FLUME
U0 = Q
cal
The flowrate at full head
enter: [value from specs.]
U1 = t
cal
The time units of Q
cal
enter: [0] per second
[1] per minute
[2] per hour
[3] per day
U2 = h
cal
The head at which Q
cal
occurs
enter: [value from specs.]
U3 = b Width of flume throat
enter: [value from specs.]
U4 = B Width of approach channel
enter: [value from specs.]
U5 = p Height of hump
enter: [value from specs.]
U6 = L Length of prismatic section of the contraction
enter: [value from specs.]
U7 = m Side slope (m horizontal : 1 vertical)
enter: [value from specs.]
VALUES CALCULATED BY OCM II
U8 = Cv Velocity coefficient at current head
U9 = Cd Discharge coefficient at current head
U10= Cs Shape of coefficient at current head
U11= A Area of cross section of flow in approach channel
U12= Cv
cal
Velocity coefficient at h
cal
U13= Cd
cal
Discharge coefficient at h
cal
U14= Cs
cal
Shape coefficient at h
cal
U15= h The liquid head
U16= eta A numerical coefficient which varies with m
Flowrate is given by: Q = Q
cal
x Cv/Cv
cal
x Cd/Cd
cal
x Cs/Cs
cal
x (h/h
cal
)
1.5
PL-269 7 – 19