Accelerometer calibration: how often, to which standards, and how
An accelerometer is a transducer that converts acceleration into an electrical signal, used for vibration measurement, modal testing, condition monitoring, and shock testing. Its sensitivity (mV/g or pC/g) and frequency response drift with time, temperature exposure, and mechanical shocks, so periodic calibration against a reference transducer is required to keep vibration data traceable.
Also known as: vibration transducer, vibration sensor, piezoelectric accelerometer, IEPE accelerometer, shock transducer
How often should an accelerometer be calibrated?
Where this number comes from
No normative calendar interval exists; sensor manufacturers and calibration laboratories recommend 12 months as the standard interval for accelerometers in routine service, with shorter intervals for harsh environments or high-stakes test programs and up to 24 months for occasionally used sensors with documented stability. The choice follows the risk-based approach of ILAC-G24 / OIML D 10.
Calibration intervals are a risk-based decision for the instrument owner, not a fixed rule: guidance documents such as ILAC-G24 and OIML D 10 describe how to set and adjust them from usage, criticality and calibration history. Treat the interval above as a starting point for your own quality system, not a compliance requirement.
What shortens or lengthens the interval
- Severe shock events, such as drops onto hard floors or overloads well beyond the measurement range, which warrant immediate recalibration
- Sustained high-temperature exposure, which ages the piezoelectric element and shifts sensitivity
- Harsh outdoor or high-vibration service (structural monitoring, engine testing) versus benign laboratory use
- Criticality of the test data, for example certification testing or NVH programs with contractual accuracy requirements
- Documented sensitivity drift between successive calibrations, which justifies extending or shortening the cycle
- Continuous monitoring deployments, which call for calibration before installation and verification after removal
Standards relevant to accelerometer calibration
The back-to-back comparison method in this part is the most common secondary calibration method for accelerometers, covering 0.4 Hz to 10 kHz
Primary method used by national metrology institutes to calibrate the reference standard accelerometers that comparison calibrations rely on
Alternative primary calibration method within the ISO 16063 series
Standards are referenced by designation and title. For normative requirements, always work from the current edition of the standard itself.
How an accelerometer is calibrated
A typical accelerometer calibration, in an accredited lab or in-house, follows this outline. The exact points, tolerances and paperwork come from the applicable standard and your own procedure.
- Inspect the sensor, connector, and cable, and verify bias voltage for IEPE types before testing
- Mount the unit under test back-to-back on a reference standard accelerometer on a calibration shaker per ISO 16063-21
- Measure sensitivity at the reference frequency, normally 100 Hz or 160 Hz, and record the as-found value
- Sweep discrete frequencies across the specified range (typically 10 Hz to 10 kHz) to produce a frequency response curve relative to the reference sensitivity
- Vary excitation amplitude at a fixed frequency to verify amplitude linearity
- Compare the as-found sensitivity with the previous certificate and with the manufacturer tolerance, typically a few percent deviation
- Issue a calibration certificate with as-found and as-left sensitivity, frequency response, and measurement uncertainty
Reference equipment typically used
- Precision calibration shaker (air-bearing electrodynamic exciter)
- Reference standard accelerometer with traceable primary calibration
- Signal conditioners for IEPE and charge-mode sensors
- Dynamic signal analyzer or dedicated calibration workstation
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Sources
- How Often Should I Recalibrate My Accelerometer?, The Modal Shop (PCB Piezotronics)
Interval claim: most manufacturers recommend annual accelerometer calibration, with usage and test requirements dictating shorter or longer intervals, extension to two years for occasionally used sensors with documented stability, and recalibration after drops or temperature overexposure
- Accelerometer Calibration: Methods, Standards & Intervals, Micro Precision Calibration
Interval guidance of roughly 6 to 24 months depending on application criticality and environmental exposure, with annual as the common standard and more frequent calibration for high-stakes applications; also the back-to-back comparison method
- ISO 16063-21:2003, Methods for the calibration of vibration and shock transducers - Part 21: Vibration calibration by comparison to a reference transducer, ISO
The back-to-back comparison calibration method, its frequency range, and its use by metrology labs for recalibration
Cite this data
Gaugelog Calibration Interval Reference, v1.0 (July 2026). 68 instrument types, 236 verified sources. Licensed CC BY 4.0.
Download as CSV or JSON. Intervals are typical starting points, not compliance requirements; every row cites its sources.
The interval on this page is one row of the dataset. Browse all 68 types on the calibration interval reference.