Signal Scaling Basics for Instrumentation
Wanneer dit van toepassing is
Use this guide when analog inputs look healthy in raw form but engineering tags drift because scaling blocks disagree.
Te gebruiken tool
Browser-based preliminary check for Signal Scaling Calculator — fast estimates, not code or stamped design output.
Signal Scaling Calculator openen →Stappen
- 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.
Voorbeelden
- 0–10 V temperature transmitter into 0–32767 ADC counts.
- Normalized -1..1 setpoint vs engineering pressure.
Vermijd dit
- 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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Veelgestelde vragen
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.