ISO 2954 specifies requirements for vibration severity measuring instruments used for evaluating machine condition. It defines frequency response, accuracy, and filter characteristics for vibration meters measuring broadband velocity.

What frequency range does ISO 2954 require?

ISO 2954 requires a measurement frequency range of 10 Hz to 1000 Hz for vibration velocity (RMS). The response must be flat within ±5% (±0.5 dB) across this range with specified roll-off characteristics outside.

What is the required accuracy for ISO 2954?

The overall accuracy must be within ±5% of reading at reference conditions, and within ±10% over the full operating range including temperature and humidity variations. Linearity must be within ±5%.

What filter types are specified?

ISO 2954 specifies bandpass filtering from 10 Hz to 1000 Hz. The low-frequency roll-off must be at least -12 dB/octave below 10 Hz, and the high-frequency roll-off at least -12 dB/octave above 1000 Hz. This ensures the instrument measures only the relevant frequency range.

Is ISO 2954 still current?

ISO 2954:2012 is the current edition. While many modern analyzers exceed its requirements, ISO 2954 compliance remains important for contractual and regulatory purposes, especially for ISO 10816/20816 vibration severity measurements.

Free Engineering Tool — #032

Vibration Instrument Class Verification

Verify if your vibration measurement instrument meets ISO 2954 class requirements. Enter instrument specifications to check compliance with frequency range, accuracy, and filter requirements.

ISO 2954Instrument Class10–1000 Hz

Compliance Check

Overall Compliance

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Frequency Range

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Accuracy

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Filter Roll-off

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Linearity

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ISO 2954 Key Requirements

Parameter	Requirement
Frequency range	10 Hz to 1000 Hz (velocity)
Flatness in band	±5% (±0.5 dB)
Accuracy at reference	±5% of reading
Overall accuracy	±10% including environment
Filter roll-off	≥ −12 dB/octave
Linearity	±5% of full scale
Measured quantity	Velocity, RMS, broadband

Frequency Response Requirement

Example — Compliant Instrument Check

Given: Range 10–1000 Hz, accuracy ±5%, roll-off −12 dB/oct, linearity ±3%

Frequency: 10 ≤ 10 Hz ✓, 1000 ≥ 1000 Hz ✓

Accuracy: 5% ≤ 5% ✓

Roll-off: 12 ≥ 12 dB/oct ✓

Linearity: 3% ≤ 5% ✓

Result: COMPLIANT

⚠️ Note: ISO 2954 compliance is the minimum requirement for vibration severity measurements per ISO 10816 / ISO 20816. Modern analyzers typically exceed these specifications significantly.

ISO 2954 Vibration Instrument Class Verification | Vibromera

Compliance Check

ISO 2954 Key Requirements

Frequency Response Requirement

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