∗
↑
↓
ALT
DISP
F
l
o
w
Head
P-40 = 4, curved
OTHER, P-40 = 4 or 5
Where the primary measuring device does not fit one of the three other categories, P-40
may be programmed for one or two head versus flow characterizations.
- P-40 = 4 : curved
- P-40 = 5 : linear
Select the method which best fits the flow characteristics of the primary
measuring element.
Characterization is achieved by entering the head (H parameter) and corresponding
flow (F parameter) either from empirical measurement or from the manufacturer’s
specification. The more breakpoints that are defined, the more accurate will be the flow
measurement. Breakpoints should be concentrated in areas exhibiting the higher
degrees of non linear flow. A maximum of eleven breakpoints can be defined.
Head data is entered in the linear units selected (P-1) and flow data is entered in the
desired units of flowrate.
By setting P-40 = 4 or 5, the H-# and F-# co-ordinates, where:
H = head data
F = flow data
# = breakpoint 1 to 11
may be alternately accessed for the selected breakpoint by successively
pressing . Breakpoints are selected by entering the desired breakpoint number
or by pressing the or key. When the desired co-ordinate has been selected,
the entry field is accessed by pressing and the head or flow is entered.
To end programming of H and F co-ordinates, press CLR while H-# or F-# is being
displayed.
F
l
o
w
Head
P-40 = 5, linear
PL-399 6 – 41
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