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4-20mA Current Loop Calculator
Convert between engineering units and 4-20mA signal levels for process instrumentation.
Process Value
?
Current measured value in engineering units.
Lower Range Value
?
Value corresponding to 4 mA.
Upper Range Value
?
Value corresponding to 20 mA.
Loop Resistance
?
Total loop resistance in ohms.
Ω
Calculate
Results
Current Signal
-
mA
Span Percentage
-
%
Loop Voltage Drop
-
V
References:
ISA-50.00.01; IEC 60381-1; HART Protocol Specification