NEN-ISO 13909-7
Hard coal and coke - Mechanical sampling - Part 7: Methods for determining the precision of sampling, sample preparation and testing
active, Most Current
| Organization: | NEN |
| Publication Date: | 1 September 2016 |
| Status: | active |
| Page Count: | 53 |
| ICS Code (Solid fuels): | 75.160.10 |
| ICS Code (Coals): | 73.040 |
scope:
NEN-ISO 13909-7 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.
Document History
NEN-ISO 13909-7
September 1, 2016
Hard coal and coke - Mechanical sampling - Part 7: Methods for determining the precision of sampling, sample preparation and testing
NEN-ISO 13909-7 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...
February 1, 2002
Hard coal and coke - Mechanical sampling - Part 7: Methods for determining the precision of sampling, sample preparation and testing
Equations are developed which link the variables which contribute to overall sampling precision. Methods are described for estimating overall precision and for deriving values for primary increment...