Water quality. Enumeration of micro-organisms in water samples. Guidance on the estimation of variation of results with particular reference to the contribution of uncertainty of measurementThis British Standard gives guidance on interpretation of the requirements specified in BS EN ISO IEC 17025: 2005 with regard to the uncertainty of measurement in microbial counts in water samples. It gives guidance on the estimation of variation in results between replicate sub samples, which will include that due to uncertainty of measurement, in order to assess whether the variation due to uncertainty of measurement has been controlled in

prevention of unsupported operational positions

BS EN 81‑71 gives additional and deviating requirements to EN 81-20 as applicable to ensure the safety of lift users and the availability of lifts

It also makes reference to three categories of circuits required to maintain their circuit integrity under defined fire conditions for varying fire survival times of 30 min

Moisture resistance

ISBN 0 580 48247 2

This looks at materials used for products accepted for contact with drinking water

steady state

but the information it contains can also be useful to:

the manufacuring process

It specifies property classes in relation to austenitic

Hoists powered by direct drive internal combustion engines

vapours or mists under normal atmospheric conditions are present continuously