Precision Digital PD6080 - Manual (Page 81)

PD6080/PD6081 Super Snooper Modbus Scanner Instruction Manual
81
Programmable Exponent Function Menu (prog e)
The programmable exponent function is used to calculate open-channel flow measured with a level
transmitter in weirs and flumes. The flow rate is proportional to the head height. Scale the scanner so that
the low input signal (e.g. 4 mA) is equal to zero flow and the high input signal (e.g. 20 mA) is equal to the
maximum flow. This method works well for all weirs and flumes that have a simple exponent in the flow
calculation formula. For weirs and flumes with complex exponents it is necessary to use a strapping table
and the 32-point linearization of the scanner.
SAVED flashes
before moving
to next PV.