Milltronics OCM II PL-269, Instruction Manual

Page: 61 / 107

P2=9 ROUND PIPE
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 = r Pipe inside radius
enter: [value from specs.] (min. 6 inches)
VALUES CALCULATED BY OCM II
U4 = h Current head
U5 = f(h) A function of the current head
U6 = f(h
cal
) A function of h
cal
U6 = f(h
cal
) A function of h
cal
U7 = Q The current rate of flow
Flowrate is given by:
Q = Q
cal
f(h)
f(h
cal
)
pi
h-r
((h-r)(r
2
-(h-r)
2
)
.5
+ r
2
(2 + arcsin( r )))
1.67
f(h) =
(r (pi + 2arcsin(
h-r
)))
0.67
r
PL-269 7 – 33