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The final section of Part 1 of the 16063 standard covers the expression of uncertainties. The area of uncertainties is probably the most intensive and most debated area of accelerometer calibration. Besides being driven by human nature issues (like national pride among labs), the area of uncertainties continues to evolve as the dynamics of acceleration sensing and the calibration measurement process are better understood and advances are made in technology. Current state of the art in primary calibration has measurement uncertainties around 0.2% to 1.5% depending upon frequency range. Measurement uncertainties for typical secondary calibration are around 1% to 3% for comparison calibration systems.
Published Uncertainty (%) | ||||
---|---|---|---|---|
10 Hz to 99 Hz | 100 Hz | 101 Hz to 920 Hz | 921 Hz to 5000 Hz | 5001 Hz to 10,000 Hz |
0.90 | 0.85 | 0.90 | 1.25 | 1.70 |
Sample Expanded Uncertainty Table