Paragraph
England and Wales
The uncertainty (on a 95% confidence interval) of the assessment methods shall be evaluated in accordance with the “Guide to the Expression of Uncertainty of Measurements" (ISO 1993) M1 or the methodology of ISO 5725:1994 M2. The percentages for uncertainty in the above table are given for individual measurements averaged over the period considered by the limit value, for a 95% confidence interval. The uncertainty for the fixed measurements should be interpreted as being applicable in the region of the appropriate limit value.
Annotations
Marginal citations
- M1
Copies of this International Standards Organisation publication can be purchased from the British Standards Institution “BSI" sales department either by telephone on 020-8996-9001 or by post from the BSI, Standards House, 389 Chiswick High Road, London W4 4AL.
- M2
Copies of this International Standards Organisation publication can be purchased from the British Standards Institution “BSI" as for footnote (a) above.