Regarding monitoring differential pressure between rooms in production areas in pharmaceutical industry:
Is it required to set 3 levels of limits , i.e. Alert limit then Action limit then Acceptance limit
or it is required to set only 2 levels of limits, i.e.
1- Alert limit
2- Action limit (which is equivalent to Acceptance limit)
(My little understanding of “WHO Technical Report Series, No. 961, Annex 5 (pages 256 & 241)” and "WHO Working document QAS/15.639/Rev.1 May 2016 (pages 67 & 54) " is that only 2 levels of limits are required (Alert and Action limits only) not 3 levels of limits)
Thanks a lot
The following pictures are Snapshots from "WHO Working document QAS/15.639/Rev.1 May 2016 (pages 67 & 54) "
Do you mean that for this “someone” he will set Action limit that is different from Acceptance limit or both are equivalent as understood from WHO Annex 5 ??
A 5 - 20 pa range I think is a very safe acceptance range between areas of the same grade (e.g grade d) since this range is mentioned in WHO Annex 5 and ISO 14644-4
there is no unit called mm Hg water
either mm water or mm Hg
note that some gauges their unit is mm water column X 10 (i.e. cm Water column)
the following links are for converting pressure units
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Frequency of monitioring differetial pressure shall be increased.
Say, if you were monitoring the DP for 8 Hours during normal limit, now you should monitor for every 4 hour.