Formula for Process Variable to Percentage Conversion

Calculating the equivalent Percentage for any given Process variable.

Formula for Process Variable to Percentage Conversion

Formula for Process Variable to Percentage Conversion

You can use our Instrumentation tool for Process Variable to Percentage Conversion. Click here.

Formula:

Percentage %   =   ((Process Variable – LRV)/Span)(100)

                      Span = URV-LRV

Where
URV upper range value
LRV lower range value

Example: 

An electronic Pressure transmitter is ranged -1 to 5 Bar and has a 4-20 ma. Calculate the Percentage output by this transmitter if the measured Pressure is 1 Bar

Span = 5 - (-1) = 6

Percentage % = ((Process variable – LRV)/Span)(100)
                          =((1-(-1))/6)(100)
                          = 33.33 %

Also Read,

Calculate Current (4-20ma) from Process variable PV

Convert current (4-20)ma to Percentage (0-100)%

Convert Percentage (0-100)% to current (4-20)ma