Formula to Calculate Process Variable from 4-20mA
Calculate equivalent Process variable from 4-20mA Formula : First Calculate equivalent Percentage from 4-20mA signal Percentage = ( X * 6.25 ) – 25 Then calculate equivalent Process variable from
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Formula to Calculate 4-20 mA from Process Variable
Calculate the equivalent 4-20mA signal from Porcess Variable. Formula : First calculate equivalent percentage from the process variable Percentage = ( X – LRV / URV – LRV ) .
Why 4-20mA Standard is so popular ?
4-20mA has an inherent ‘live zero’. Zero engineering units is 4.0mA, not 0.0mA. 0.0mA indicates an open circuit, a failure or a fault mode like cut wires or a dead