Use of the Ringelmann and miniature smoke chartsBS 2742: 2009 Use of the Ringelmann and miniature smoke charts Smoke emission can be assessed using Ringlemann and miniature smoke charts. These charts compare the darkness of smoke with standard shades of grey placed in a suitable position. The charts are placed at such a distance from the observer that the black lines merge into the white background and produce for each shade a uniform grey. The numbers of the shades (the Ringelmann numbers) ranged

The health

5 Validation by analysis

The standard demonstrates how overall safety is refined into E/E/PE safety function requirements

Requirements for wheelchair access devices (where fitted)

If tested using other wavelengths

Measurement circuit and calculation

BS EN 1090-3 gives options for specifying requirements to match project specific requirements and also applies to temporary aluminium structures

BS EN ISO 7886-4 is the fourth part of a multi-part series that specifies requirements for sterile single-use hypodermic syringes made of plastic and rubber materials with or without needle and intended for the aspiration of fluids or the injection of fluids immediately after filling and of design such that the syringe can be rendered unusable after use

depth and affected area of discontinuities

sintered hydroxyapatite and alkali-heat-treated titanium metal

BS EN 10305-2:2016 replaces BS EN 10305-2:2010 which has been withdrawn

The standard covers safe design