Milltronics OCM II PL-269, Инструкция по эксплуатации

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P2 = 14 UNIVERSAL VELOCITY-AREA FLOW CALCULATION
From the Head vs Cross Sectional Area 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 channel cross sectional area associated with each head
increment and enter this as the value of the assigned "A" parameter.
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 = N the last "A" parameter number assigned. (AN)
enter: [N]
U6 = h
max
the highest head to be entered, associated with parameter AN
enter: [value from graph]
A0 = area at 0 head
enter: [0] as head is equal to 0
A1 = area 1 the channel cross sectional area at head increment 1
enter: [value from graph]
AX = area X the channel cross sectional area 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 – 43