Convert Square Root Extraction Input to Linear Output

Square Root Input Parameters
Input Unit [?]
Input Reading [?]
Low Input Limit [?]
High Input Limit [?]
Linear Output Parameters
Output Unit [?]
Low Output Limit [?]
High Output Limit [?]
Output Reading [?]

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User Guide

This square root extraction input to linear output conversion tool provides an easy way to determine the ideal linear output produced by a measurement instrument for any given sqrt input value. A conversion scale for each specified square root extraction input and linear output range combination selected will be displayed below the calculated output.

Input

Input Unit

Enter the measurement unit associated with the input values.

SqRt Input Reading

Enter the Square Root Extraction Input measurement reading to be converted.

Lowest SqRt Input

Enter the minimum possible value for the sqrt input range.  The value can be a negative or a positive value and should be in the same engineering units as all SqRt Input values.

Highest Linear Input

Enter the maximum possible value for the sqrt input range.  The value can be a negative or a positive value and should be in the same engineering units as all SqRt Input values.

Output

Output Unit

Enter the measurement unit associated with the output values.

Lowest Linear Output

Enter the minimum possible value for the linear output range.  The value can be a negative or a positive value and should be in the same engineering units as all Linear Output values.

Highest Linear Output

Enter the maximum possible value for the linear output range.  The value can be a negative or a positive value and should be in the same engineering units as all Linear Output values.

Linear Output Reading

This is the ideal Linear Output for the specified SqRt Input Reading and excludes all measurement device errors and uncertainties.

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Help

10t/h flow to linear dp pressure

I have a dp flow transmitter with a 0-250 mbar (field linear) range, and a DCS with a flow range of 0 – 15 t/h and a setpoint of 10 t/h, what mA reading do I have to simulate from field in linear?

The linear reading to simulate would be 11.1111 mA

SqRt to Linear % span formula

What is the formula for converting a square root reading as percentage of span to a linear reading?

The formula is as follows:

%LinSpan = (%SqRtSpan/100)² x 100

% flow measured by dp transmitter to linear 4-20mA

A dp type transmitter shows 30% of steam flow on the LCD display, how can I find the formula to convert to the linear milliamp reading?

Assuming a typical milliamp signal of 4-20mA, the formula to use would be:

mA = (%Rdg/100)² x 16 + 4

Using this sqrt to linear signal converter enter the following values:

Square Root Extraction Input

• Reading = 30
• Lowest = 0
• Highest = 100

Linear Output

• Lowest = 4
• Highest = 20
• Answer = 5.44

The resulting sqrt 0-100%  to linear 4-20mA conversion scale is as follows:

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