ULTRA 4 INSTRUCTION MANUAL
98
Programming is now complete, and the unit can now be returned to the run
mode, press CANCEL until Run Mode? Is displayed on the LCD press
ENTER, and the Ultra 4 will return to Run Mode.
BS3680 Rectangular Broad Crested Weir
Point of Measurement
The transducer must be above the maximum head P704 by at least the
near blanking distance P107.
The head is measured at a point 3 to 4 times the maximum head upstream
from the weir crest, to ensure the surface of the liquid is not affected by
turbulence or drawdown.
Important Notice
If relay setpoints do not meet the exact requirements of the application,
they can be modified to suit by pressing ENTER when, “For More Options
Hit Enter”, is displayed, and entering new values to relay setpoints as
required. Alternatively, the relevant relay setpoint can be accessed either
by the main menu system or directly via parameter number and changed
as necessary.
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