Pulsar UltraTWIN, Инструкция по эксплуатации

Страница: 170 / 214

ULTRATWIN (UL) INSTRUCTION MANUAL
170
Calculations
The following parameters P*720 to P*725 are values calculated by the unit,
dependent on application, and are “Read Only”, therefore have no default
values.
P*720 Area
Displays the calculated value of the area when, P700 = 2 BS3690 flumes and
P700 = 4 Area Velocity.
P*721 Cv
Displays the calculated value for Cv when, P700 = 2 BS3680 flumes.
P*722 Cd
Displays the calculated value for Cd when, P700 = 2 BS3680 flumes.
P*723 Ce
Displays the calculated value for Ce when, P700 = 2 BS3680 weirs.
P*724 Cu
Displays the calculated value for Cu when, P700 = 2 BS3680 flume and
P701 = 3 or 4 U-Throated flumes.
P*725 Kb
Displays the calculated value for Kb when, P700 = 3 BS3680 weirs and
P701 = 1 Rectangular weir.
Breakpoints
P*730-P*793 Breakpoints
Where the Primary Measuring device does not match any of the pre-
programmed devices contained in the UltraTWIN
, then a universal
volume calculation can be performed. A head Vs flow chart is used, to enter
several
Breakpoints for the head and flow (P*730-793) , 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