BS 2742:2009

Foreword
Introduction
1 Scope
2 Normative references
3 Use of the Ringelmann chart and miniature smoke chart
Annexes
Annex A (informative) - Format of Ringelmann charts
Annex B (informative) - Chart holders and use of the
        chart BS 2742C
Bibliography

Gives guidance on the use of BS Ringelmann charts to assess smoke emissions from unregulated processes.

This British Standard provides guidance on the use of BS Ringelmann charts to assess smoke emissions from unregulated processes. It is not suitable for calibrating Continuous Emissions Monitoring Systems. It is not applicable to processes whose emissions are regulated by EU Directives with stated Uncertainty.

NOTE Most regulated processes have particulate emissions limits below Ringelmann 1.

This British Standard is intended for use with the related publications:

• BS2742C, Ringelmann chart;

• BS2742M, Miniature smoke chart.

Other measuring devices or charts are not suitable for use with this British Standard.