Tools · Signal Scaling
Signal Scaling Calculator Analog I/O
An analog signal from a sensor (mA / V) ↔ engineering units, both directions, plus a calibrator-style 2-point → slope/offset solver for paste-into-Niagara setup.
Signal → Eng. Units takes a raw reading and scales it to the published range.
Eng. Units → Signal runs it backwards — what mA should an output drive to land on a setpoint?
2-Point → Slope / Offset takes two known (raw, eng.) pairs and solves m and b directly.
Inputs are seeded with an example — edit them to your numbers.
Input
Output
Eng. value
—
% of span
—
Input
Output
Signal output
—
% of span
—
Reverse: drive this output to land on the entered eng. value.
Input — two IO pairs
Output — y = mx + b
Slope (m) — scale factor
—
Offset (b) — intercept
—
Common Signal Types
| Signal | Live zero |
|---|---|
| 4–20 mA | yes |
| 0–20 mA | no |
| 0–10 V | no |
| 2–10 V | yes |
| 0–5 V | no |
| 1–5 V | yes |
"Live zero": a broken wire reads below-range and faults, not as a valid 0%.