Overview
ISO/TS 15694:2004 - Mechanical vibration and shock - specifies standardized methods for measuring and evaluating single shocks transmitted from hand-held and hand-guided machinery to the hand–arm system. It applies to tools with a maximum strike rate below 5 Hz and defines both signal parameters and additional instrumentation requirements needed to produce comparable emission data. The Technical Specification supports consistent emission declaration and the future development of exposure risk criteria but does not provide methods for interpreting human health effects.
Key topics and technical requirements
- Scope and definitions: clear definitions for single shock, single-shock vibration, repetition time and strike rate.
- Signal parameters: parameters for describing single shocks include:
- Flat-weighted acceleration (band‑limited 6.3 Hz to 1250 Hz)
- Root-mean-square (r.m.s.) and root-mean-quad (r.m.q.) values (recommended integration time T = 3 s)
- Running r.m.s. (preferred time constant τ = 0.125 s)
- Maximum transient, peak value, crest factor, shock content quotient, and W-weighted variants
- Measuring instrumentation: additional requirements and test methods for accelerometers and measurement chains are specified (normative Annexes A, D and E). Digital instrumentation recommendations appear in Annex B.
- Measurement procedure: guidance on attaching accelerometers, orientation, working procedure and required contents of a measurement report to ensure repeatability and comparability.
- Annexes: normative and informative annexes providing filters, instrumentation tests, and alternative parameters.
Practical applications and who uses it
ISO/TS 15694:2004 is used by:
- Product test laboratories performing emission testing of hand-held tools (nailers, tackers, staplers, setting tools)
- Tool manufacturers documenting shock emission for design, quality control and technical data sheets
- Health & safety professionals and ergonomists gathering consistent exposure data to support risk assessment frameworks (note: the standard does not assess health effects)
- Standards bodies and researchers developing exposure criteria or comparing tools across models
Benefits:
- Produces consistent, reproducible hand-transmitted single shock measurements
- Enables objective comparison of power tools’ shock emission
- Provides instrumentation and reporting requirements to support regulatory or voluntary emission declaration
Related standards
- EN ISO 5349‑1 / EN ISO 5349‑2 (hand-transmitted vibration)
- EN 1033 (laboratory measurement of grip surface vibration)
- ENV 28041 / ISO 8041 (measuring instrumentation)
- ISO 5348 (accelerometer mounting)
- CEN ISO/TS 8662-11 (fastener driving tools)
Keywords: ISO/TS 15694:2004, single shocks, mechanical vibration, hand-held machines, flat-weighted acceleration, accelerometer, shock measurement, hand-arm system, strike rate.