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Square Root Extraction Algorithms
(Engineering Units Processing Algorithm)
This parameter chooses the equation for processing the input from a transmitter or
transducer.
EuPA
= 0 - Linear is for inputs that are directly proportional to flow (no square root extraction
needed).
EuPA
= 1 - Square Root, takes the square root of the input (pressure or differential pressure)
over the whole range of the input.
EuPA
= 2 - Two Stage Square Root, takes the square root of the input when the input is
greater than 4% of input (20% of flow) and uses a linear relationship below 4% with a slope of
5.
EuPA
= 3 - Three Stage Square Root, uses a linear relationship when input is less than 1%
with a slope of 1, a linear relationship between 1 and 2.5% with a slope of 10 and a square
root above 2.5%.
EuPA
= 4 - Variable Exponent, when properly set , provides a means of accurately accommo-
dating weirs and flumes.
EuPA
= 5 - Piecewise Linear, provides the user with a means of inputing data from a non-
linear sensor.
EuPA
= 6 - Variable Exponent with correction, provides a means to use Palmer-Bowlus or H
flumes.
EuPA
= 7 - Saturated Steam Flow with Pressure Correction.
Display code
EuPA
.
Totalizer Decimal Position
Specifies how the total, preset, and pulsed output values will be displayed. The factory
default=0, no decimal. Display code
tdP
.
Totalizer Factor
Specifies how the total will be scaled, and as a result, the corresponding scaling of the preset
and pulsed output values. For totalizer factor = -4, -3, -2, -1, 0, 1, 2, or 3, the total will be
multiplied by .0001, .001, .01, .1, 1, 10, 100, or 1000 respectively. The factory default=0.
Display code
tFAC
.
Totalizer Low Flow Cutoff
Below the specified percent of full scale Process Value, the flow will not be added to the total.
The factory default = 1.0. Display code
tLFC
.
Summary of Contents for MRC 7800
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