FORMULA
Calculation method
Value = Lower value + ((Signal − Signal low) / Signal span) × Measurement span
For a 4–20 mA transmitter ranged 0–100 °C, a 7.2 mA signal corresponds to 20 °C.
INSTRUMENTATION
4–20 mA, 0–20 mA and 0–10 V Calculator
Scale analog transmitter signals bidirectionally to temperature, pressure, flow, level or any engineering unit.
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CALCULATOR
Analog signal scaling
4 mA20 mA0 °C100 °C
Calculated engineering value50,00 °C
Siemens raw value (approx.)13.824 / 27648
iThe calculation assumes linear scaling. Verify the sensor range, PLC channel type and under/over-range fault limits in the device documentation.
FREQUENTLY ASKED
About this calculation
Why does 4 mA represent zero?
The live zero helps distinguish a broken wire or power loss from a valid zero measurement.
What is the 0–27648 value?
Siemens analogue channels often scale the nominal range to 0–27648 raw counts; confirm the exact configuration in the hardware settings.
ENGINEERING NOTE
Fast calculation, clear assumptions, correct interpretation
The tools are intended for preliminary assessment and checking. Alongside each result, we explain the formula, assumptions and field conditions that require attention.
Prepared by: Neo Kontrol Otomasyon · Last technical review: July 2026
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