Reverse flow calculation for calibration calculations

The reverse flow calculation is used to perform the input limits and output tolerance calculations for linear assets, for example flow indicators in reverse flow.

You select the Reverse Flow check box to use this calculation.

The formula for calculating desired output is included in the following equations.

The following figure shows the desired output calculation:
Figure 1. Desired output calculation
Desired output calculation
Table 1. Single squared equation for reverse flow
Criterion Description Squared equations

EU

When the Reverse Flow check box is selected, the squared equation is used for the engineering unit criterion.

Squared formula for EU

%Span

When the Reverse Flow check box is selected, the squared equation is used for the %Span criterion.

Squared formula for %span

%URV

When the Reverse Flow check box is selected, the squared equation is used for the %URV criterion.

Squared formula for %URV

%Reading

When the Reverse Flow check box is selected, the squared equation is used for the %Reading criterion.

Squared formula for %Reading
Figure 2. Summed squared equations. This equation calculates the reverse flow for summed squared criteria.
Summed Squared Equation