Rubber — Determination of styrene content — Nitration method
Applicable to all types of styrene-butadiene rubber (SBR) including oil-extended types and also for block copolymers containing up to 50 % (m/m) of styrene. The procedure may give low results when the content of mineral fillers insoluble in nitric acid exceeds 5 % (m/m). The principle is based on the extraction of a test portion with acetone and digestion with nitric acid to oxidize the styrene…
Information technology - Guidelines for the management of software documentation
Addresses the policies, standards, procedures, resources and plans to produce an effective software. Applicable to all types of software from the simplest program to the most complex software system and to all stages of the software lifecycle. Detailed advice on the content and layout of software documentation is not provided. Annex A contains checklists of the policies, standards, procedures and…
Sound system equipment. Part 17: Standard volume indicators
Gives the characteristics to be specified, performance requirements and the relevant methods of measurement for electromechanical volume indicators. The concept of 'volume' is a practical way of assigning a numerical value to the magnitude of electrical speech and music programme signals. The contents of the corrigendum of September 1991 have been included in this copy.
Sound system equipment. Part 17: Standard volume indicators
Gives the characteristics to be specified, performance requirements and the relevant methods of measurement for electromechanical volume indicators. The concept of 'volume' is a practical way of assigning a numerical value to the magnitude of electrical speech and music programme signals. The contents of the corrigendum of September 1991 have been included in this copy.
Manganese ores and concentrates — Determination of iron content — Flame atomic absorption spectromet...
The method is applicable to products having an iron content between 0,2 % (m/m) and 10 % (m/m). ISO 9681 should be read in conjunction with ISO 4297. Specifies principle, reagents, apparatus, sampling and samples, procedure, and expression of results.
Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 1: ...
Specifies general safety requirements for electrical equipment intended for professional, industrial process, and educational use, including equipment and computing devices for: -measurement and test; -control; -laboratory use; -accessories intended for use with this equipment. Does not cover: -reliable function, performance or other properties of the equipment; -servicing (repair); -protection…
