BS 6805-4:1987

National foreword
Committees responsible
Method
0. Introduction
1. Scope and field of application
2. References
3. Definitions
4. General
5. Guidelines for the determination of the labelled
    value, Lc, by the labeller
6. Verifying the labelled value for a batch of
    machines
7. Information to be given in a specific labelling
    code for a specific family of machines
Annexes
A. Operating characteristic curves and examples of
    single, double and sequential sampling
B. Guidelines for estimating standard deviations and
    for the use of operating characteristic curves
C. List of symbols
Tables
1. Acceptability constant k for different sample
    sizes n
2. Acceptability constants ka, kr and kd for double
    sampling and equivalent sample sizes (single/double)
3. Acceptability values a, b and r for sequential
    sampling and equivalent sample sizes (single/
    sequential)
4. Measured values, Li, and original data
5. Computational formulae and numerical results
6. Measured values
7. Quantiles of the standardized normal distribution
Figures
1. Operating characteristic curves (OCs) for single
    (double and sequential) sampling
2. Relation between triangle L / sigma M and sample
    size n
3. Change of the operating characteristic curve for
    sigma t not equal to sigma m
Bibliography

Guidelines for determining the labelled value by the labeller and statistical sampling procedures for verifying compliance of the noise emissions of a batch (lot) of machinery and equipment with its labelled value. Information to assist in drawing up specific labelling codes for specific families of machines.

This part of ISO 7574 provides guidelines for determining the labelled value, L_c, by the labeller and specifies statistical sampling procedures for verifying compliance of the noise emissions of a batch (lot) of machinery and equipment with its labelled value.

This part of ISO 7574 is intended to assist those parties responsible for drawing up specific labelling codes for specific families of machines. It is also intended to be of use to labellers who want their batches of machines to conform with verification procedures that are in accordance with the specifications given in the specific labelling codes based on clause 7.

This part of ISO 7574 does not deal with the consequences that ensue if the stated value is not confirmed as verified for a batch (lot) of machines.