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Formula for Percentage to Process Variable Conversion

Calculating the equivalent Process Variable for any given percentage of signal.

Formula for Percentage to Process Variable Conversion
Formula for Percentage to Process Variable Conversion
 
Formula:
 
Process Variable = Span(X/100) +LRV

Span = (URV) – (LRV)

Where
X is Percentage of signal
URV is Upper Range of value
LRV is Lower range of value

Example: 

A pressure gauge is ranged -1 to 1 bar; calculate the Measured Variable for 40 % of signal

Span = (URV) – (LRV)
= 2 Bar

Process Variable    = Span(X/100) +LRV
= (2)(40/100)+(-1)
= -0.2 Bar

Also Read : Instrumentation Online Tools For Easy Calculations


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