Low Frequency Accelerometer Calibration

Long Stroke Calibration Shaker | 771 & 779 Options

The Low Frequency Long Stroke Accelerometer Calibration Shaker represent a new level of calibration performance. These 9155D-770 Series exciters offer ultra-low frequency calibrations with the Accelerometer Calibration Workstation Model 9155D. Users can accurately calibrate accelerometers to frequency range as low as 0.1 Hz using the shaker’s 10” (255 mm) stroke.

cal accelerometer 2129e025 Longstroke product

The 9155D-771 and 9155D-779 options both utilize a high sensitivity quartz ICP® back-to-back reference accelerometer specifically designed by PCB Piezotronics for low frequency comparison calibration from 0.5 to 500 Hz. The double-ended reference mounts to the long stroke shaker and provides a direct mounting surface for the Sensor Under Test. The quartz sensing element provides superior stability and performance compared to ceramic-based standards and the low impedance ICP® design nearly eliminates errors due to cable motion and signal degradation seen with charge accelerometers, particularly at low frequencies and large displacements.


  • Offers significantly faster calibration times than traditional long stroke shakers
  • Achieves excellent signal to noise ratio
  • Utilizes quartz ICP® reference accelerometer for calibration from 0.5 to 500 Hz
  • Displacement-based optical reference option delivers calibrations to 0.1 Hz
  • Simple and accurate magnitude and phase calibration per ISO 16063-21
  • Printed calibration certificates fulfill ISO 17025 requirements


View Datasheet

9155D-771 Option9155D-779 Option
Frequency Range – Hz [1] [2]0.5 - 5000.1 - 500
Stroke - in (mm) pk-pk10 (255)
Maximum Payload - lb (kg)4.4 (2)
Reference Sensor TypeQuartz Shear ICP AccelerometerOptical Encoder / Quartz Shear ICP Accelerometer
Standards ComplianceISO 16063-21
Shaker Model2129E025
Full SpecificationsViewView

[1] -771 supplies only the accelerometer reference used from 0.5 to 500 Hz
[2] -779 supplies both the optical reference (0.1 to 10 Hz) and the accelerometer reference (10 to 500 Hz)


Expanded Measurement Uncertainty [1]9155D-771 Option9155D-779 Option
0.25 - 0.5 Hz-3.0%
0.5 - 1 Hz1.5%1.1%
1 - 10 Hz1.25%0.8%
10 - 100 Hz1.0%1.0%

[1] Per ISO with k=2 coverage factor using PCB Q353B51. Uncertainty below 0.25 Hz, above 100 Hz, is undefined.

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In addition to the reference accelerometer, the 9155D-779 option utilizes a state-of-the-art optical encoder reference for unparalleled low frequency signal quality and performance. This reference measures displacement instead of acceleration, allowing for optimum performance by eliminating low frequency acceleration limitations due to stroke length. The result is greatly improved low frequency dynamic calibration, extended down to 0.1 Hz. The Accelerometer Calibration Workstation Model 9155D comes with the PCB Piezotronics “Total Customer Satisfaction” guarantee, and features back-to-back comparison calibration for both sensitivity and phase according to ISO 16063-21. measurement.