P
RO
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™ PD6088/PD6089 Modbus
®
Scanner
Instruction Manual
52
Linear Function Menu (
Linear
)
Scanners are set up at the factory for linear function with 2-point linearization. Up to 32 linearization points can be
selected for PV1 and PV2 under the
Linear
function in the
Advanced Features
menu. The multi-point linearization can
be used to linearize the display for non-linear signals such as those from level transmitters used to measure volume
in odd-shaped tanks or to convert level to flow using weirs and flumes with complex exponents.
Note: Multi-point Linearization applies to PV1 and PV2 only. All other PVs use two linearization points.
Square Root Function Menu (
Square
)
The square root function is used to calculate flow measured with a differential pressure transmitter. The flow rate is
proportional to the square root of the differential pressure. 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.
