Milltronics OCM II PL-269, Instruction Manual

Page: 69 / 107

P2 = 13 TRAPEZOIDAL BOTTOM CHANNEL, VELOCITY-AREA PRODUCT
U0 = Q
cal
The flowrate at full head at velocity v
cal
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 = v
sensor
Full scale reading of velocity sensor in (the chosen) linear units per second at 5 volt input.
enter: [value from specs.]
U4 = v
cal
The maximum liquid velocity in the same units
enter: [value from specs.]
U5 = b width of the bottom of the channel
U6 = B width of the top of the channel
U7 = ht height of transition to vertical section of the channel
Flowrate is given by: Q = Q
cal
x {area(h)/area(h
cal
)} x {v/v
cal
}
NOTE : This formula will work with a V bottom (b=0) or Rectangular channels (b=B).
PL-269 7 – 41