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ISO 13909-7:2016

Hard coal and coke -- Mechanical sampling -- Part 7: Methods for determining the precision of sampling, sample preparation and testing

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Kehtiv alates 23.06.2016
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23.06.2016
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In ISO 13909-7:2016, formulae are developed which link the variables that contribute to overall sampling precision. Methods are described for estimating overall precision and for deriving values for primary increment variance which can be used to modify the sampling scheme to change the precision. Methods for checking the variance of sample preparation and testing are also described.
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ISO 13909-4:2016

Hard coal and coke -- Mechanical sampling -- Part 4: Coal -- Preparation of test samples (Corrected version 2016-11-01)
Uusim versioon Kehtiv alates 23.06.2016
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ISO 13909-5:2016

Hard coal and coke -- Mechanical sampling -- Part 5: Coke -- Sampling from moving streams
Uusim versioon Kehtiv alates 23.06.2016
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ISO 13909-6:2016

Hard coal and coke -- Mechanical sampling -- Part 6: Coke -- Preparation of test samples
Uusim versioon Kehtiv alates 23.06.2016
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ISO 13909-8:2016

Hard coal and coke -- Mechanical sampling -- Part 8: Methods of testing for bias
Uusim versioon Kehtiv alates 23.06.2016