Math Functions (Lnear, Squar, Prog. E , Cutof) - FlowLine LI25 Series Instruction Manual

LI25 Series Loop-Powered Meters

Math Functions (lnear, Squar, Prog. E , Cutof)

The LI25 SERIES provides a number of math functions to condition
outputs from linear and non-linear transmitters.
Advanced
Features
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Linear (lnear)
Meters are set up at the factory for linear function. The linear function
provides a display that is linear with respect to the input signal.
Square Root (Squar)
The square root function is used to linearize the signal from a differential
pressure transmitter and display flow rate in engineering units.
Programmable Exponent (Prog. E )
The programmable exponent function is used to linearize the level
signal in applications using weirs and flumes and display flow rate in
engineering units. Upon selecting programmable exponent (Prog. E ), the
meter prompts entry of a 5-digit value between 0.5000 and 3.0000 as
the exponent.
Low-Flow Cutoff (CutoF)
The low-flow cutoff feature allows the meter to be programmed so that
the often-unsteady output from a differential pressure transmitter, at low
flow rates, always displays zero on the meter.The cutoff value may be
programmed from -99999 to 99999. Below the cutoff value, the meter
will display zero. Selecting either square root or programmable
exponent will set the cutoff value to 0. Program the cutoff value to -
99999 to disable.
Press Enter to Accept Setting
Lnear Squar prog. e
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Instruction Manual
Cutof