Signal Scaling Basics for Instrumentation
Cuándo aplica
Use this guide when analog inputs look healthy in raw form but engineering tags drift because scaling blocks disagree.
Herramienta a usar
Browser-based preliminary check for Signal Scaling Calculator — fast estimates, not code or stamped design output.
Abrir Signal Scaling Calculator →Pasos
- 1Identify raw range (0–10 V, 4–20 mA mapped to counts, etc.).
- 2Map raw endpoints to engineering endpoints linearly unless characterized otherwise.
- 3Verify engineering units and offsets on both sides of the conversion.
- 4Test at two or more points including near alarm limits.
- 5Log results in commissioning records for future troubleshooting.
Ejemplos
- 0–10 V temperature transmitter into 0–32767 ADC counts.
- Normalized -1..1 setpoint vs engineering pressure.
Qué evitar
- Off-by-one on integer scaling with asymmetric ranges.
- Forgetting that field devices may output square-rooted flow.
- Mixing gauge and absolute pressure without a fixed offset note.
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FAQ
Nonlinear sensors?
Use device linearization or piecewise tables; do not force one slope everywhere.
Filtering?
Filtering changes dynamics but not steady-state scaling; separate concerns.
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