Square root tolerance for calibration calculations
The square root calculation is used to perform the input limits and output tolerance calculations for differential pressure producing flow meters.
Square root calculations
You select the Square Root of Input check box to use this calculation.
The formula for calculating the desired output is included in the square root equations.

Criterion | Description | Positive square root equations | Negative square root equations |
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EU |
When the Square Root of Input check box is selected, the positive square root equation is used for the engineering unit criterion. The negative square root equation is used if the input + tolerance is a negative number. |
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%Span |
When the Square Root of Input check box is selected, the positive square root equation is used for the %Span criterion. The negative square root equation is used if the input + tolerance is a negative number. |
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%URV |
When the Square Root of Input check box is selected, the positive square root equation is used for the %URV criterion. The negative square root equation is used if the input + tolerance is a negative number. |
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%Reading |
When the Square Root of Input check box is selected, the positive square equation is used for the %Reading criterion. The negative square root equation is used if the input + tolerance is a negative number. |
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Table 2 shows the positive square root equation and negative square root equation for a summed square root.
Description | Summed square root equation |
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Positive square root equations |
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Negative square root equations |
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