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P1-724, P2-724 Cu
Displays the calculated value for Cu when, P1-700, P2-700 = 2 (BS3680
flume) and P1-701, P2-701 = 3 or 4 (U-Throated flume).
P1-725, P2-725 Kb
Displays the calculated value for Kb when, P1-700, P2-700 = 3 (BS3680
weirs) and P1-701, P2-701 = 1 (Rectangular weir).
Breakpoints
P1 or P2
P1-730 to P1-793, P2-730 to P2-793 Breakpoints
Where the Primary Measuring device does not match any of the pre-
programmed devices contained in the Ultra Twin, then a universal volume
calculation can be performed. A head Vs flow chart is used, to enter a
number of Breakpoints for the head and flow (P1-730 to 793, P2-730 to
793), which is either provided by the manufacturer or created based on the
dimensions of the device.
Breakpoints should be entered in pairs of head and the corresponding flow
for that head. The first pair entered must be for zero head and flow and the
last pair entered must be for maximum head and flow. The higher number
of breakpoints (pairs) entered then the greater accuracy there will be. There
are a maximum number of 32 breakpoints (pairs) for head and flow that can
be entered.
Tables
P1 and P2
P1-796, P2-796 Reset Breakpoints
This parameter allows the resetting, to the default value, of all previously set
breakpoints (P1-730 to 793, P2-730 to 793), without having to access them
individually. When it is necessary to reset or amend particular breakpoints
this can be achieved by directly accessing the desired parameter (P1-730 to -
793, P2-730 to 793) and changing as required.
P1-797, P2-797 Number of Breakpoints Set
This parameter allows you to review the number of breakpoints that have
been set, without the need to access each individual one in turn, this is a
“Read Only “ parameter and no values can be entered.
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