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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
Formula for Process Variable to Percentage Conversion
 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 : Instrumentation Online Tools For Easy Calculations

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6 comments

Cameron White May 29, 2015 at 2:59 pm

Thanks for sharing the formulas related to instrumentation.

Reply
Shaju September 16, 2015 at 11:29 am

Thanks for the information.

Reply
Neeraj Sharma February 13, 2016 at 1:58 pm

Thanks allot Sir

Reply
mani May 11, 2016 at 7:01 am

If conversion from MA to differential pressure any formula?????

Reply
Hajee November 25, 2017 at 1:28 pm

Its good

Reply
Mohamed Razick April 16, 2018 at 3:19 pm

thank you very much SIR

Reply

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