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Laser Primary Accelerometer Calibration

World Class Uncertainties | 575 Option

The Laser Primary Accelerometer Calibration System offers world class uncertainties in vibration calibration. The Laser Primary Model 9155D-575 option allows metrologists to perform primary calibration of vibration sensors with extremely low measurement uncertainty, meeting the performance requirements specified in ISO 16063-11.

CE | UKCA
cal accelerometer 9155D575 Laser Primary Calibration product

The system seamlessly integrates with the Accelerometer Calibration Workstation Model 9155D, allowing for both primary calibrations using laser interferometer and secondary calibrations using the system’s reference standard accelerometer in a back-to-back comparison configuration, as specified in ISO 16063-21.

Highlights

  • Assures accurate, NIST and PTB traceable calibrations
  • Provides both primary and secondary calibrations
  • Produces low measurement uncertainty through direct demodulation of Doppler laser signal
  • Dual beam, dual pass laser increases efficiency and accuracy
  • Set-up tests, acquire data, save results, and print ISO 17025 compliant certificates with ease, precision and automation
  • Setup tests, acquire data, save results, and print reports quickly with precision and automation
  • Define multiple pass/fail criteria with automatic recall from internal database

Specifications

View Datasheet

9155D-575 Option
Frequency Range0.1 Hz – 20 kHz
Acceleration Level – g0.1 – 10
Velocity Level – ips (m/sec)0.05 – 5 (1.27 – 127)
Laser Interferometer TypeHe-Ne, dual pass, homodyne plain mirror Michelson interferometer
Standards ComplianceISO 16063-11
Required Shaker Option9155D-831

Uncertainties

Expected Overall Uncertainty
0.5 ≤ f ≤ 10 Hz0.3% [1]
5 Hz1.0% [2]
5 Hz ≤ f ≤ 100 Hz0.5% [2]
100 Hz & 159 Hz0.2% [2]
159 Hz ≤ f ≤ 1000 Hz0.5% [2]
1k Hz ≤ f ≤ 5k Hz0.7% [2]
5k Hz ≤ f ≤ 15k Hz1.5% [2]
15k Hz ≤ f ≤ 20k Hz2.0% [2]
Typical Phase Uncertainty
0.5 Hz ≤ f ≤ 10 Hz [3] – Phase0.7%
5 Hz ≤ f ≤ 100 Hz – Degree0.7%
100 Hz ≤ f ≤ 5k Hz – Degree0.7%
5k Hz ≤ f ≤ 20k Hz – Degree1.3%

[1] DAQ with air bearing low frequency shaker
[2] DAQ with primary laser reference air bearing shaker
[3] Using long stroke low frequency shaker

Resources & Education

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The system employs a Michelson interferometer to measure the displacement of the calibration platform. The signal is directly demodulated from the in-phase and quadrature-phase components of the laser doppler signal. The result is a primary calibration based upon a physical constant, the wavelength of a He-Ne laser.

When selecting the 9155D-575 Laser Primary option, the 9155D831 Air Bearing Shaker option is required. This option configures the 9155 system to include the K394B31 Air Bearing Shaker System, providing superior calibration performance compared to traditional flexure-based electromechanical calibration shakers. Using this Air Bearing Shaker, calibrations can be performed up to 20 kHz and transverse motion can be effectively eliminated meeting the recommendations specified in ISO 16063-11 and 16063-21, greatly reducing measurement uncertainties.