Signal Scaling Basics for Instrumentation

适用场景

Use this guide when analog inputs look healthy in raw form but engineering tags drift because scaling blocks disagree.

要使用的工具

Browser-based preliminary check for Signal Scaling Calculator — fast estimates, not code or stamped design output.

打开 Signal Scaling Calculator →

步骤

  1. 1Identify raw range (0–10 V, 4–20 mA mapped to counts, etc.).
  2. 2Map raw endpoints to engineering endpoints linearly unless characterized otherwise.
  3. 3Verify engineering units and offsets on both sides of the conversion.
  4. 4Test at two or more points including near alarm limits.
  5. 5Log results in commissioning records for future troubleshooting.

示例

  • 0–10 V temperature transmitter into 0–32767 ADC counts.
  • Normalized -1..1 setpoint vs engineering pressure.

应避免

  • 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.

相关工具

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工程 中的更多内容

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常见问题

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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