Milltronics OCM II PL-269, Instruction Manual

Page: 73 / 107

P2 = 15 UNIVERSAL HEAD vs. FLOW CALCULATION
From the Head vs Flowrate graph for the primary element, divide the head axis of the
graph into equal increments.
Sequentially assign each increment an "A" parameter number starting from "A0" at 0 head
to a maximum of "A31". Flow accuracy improves with the number of "A" parameters used.
From the graph determine the flowrate associated with each head increment and enter
this as the value of the assigned "A" parameter.
U0 = Q
cal
the flowrate at full head
enter: [value from graph]
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 graph]
U3 = N the last "A" parameter number assigned (AN).
enter: [N]
U4 = h
max
the highest head to be entered, associated with parameter AN
enter: [value from graph]
A0 = flow at 0 head
enter: [0] as head is equal to 0
A1 = flow 1 the flow at head increment 1.
enter: [value from graph]
AX = flow x the flow at head increment X, continue to enter points from graph until AN.
enter: [value from graph]
Note : "A" parameters need to be accessed and exited by [A0] [E] or [P3] [E]. "A" parameter
values may be entered as a percentage if desired.
% AX value = AX value x 100
AN value
PL-269 7 – 45