The duration for conducting temperature mapping episodes should be enough to demonstrate control of the storage system during all facets of operation. These include normal operational activity, and also weekend “quiet” periods. The latter point is important because without the numerous door openings, which typify “operational” activity, weekend periods can sometimes get too cold. Also on weekends a different regime of maintenance and cleaning activities can occur which may impact the temperature control of the system.
So for warehouses a temperature mapping duration of 7 – 14 days is expected.
For large cool rooms, which operate within a warehouse, 7 days of mapping evidence should be adequate to demonstrate control and conformance.
For smaller climatic chambers which operate within a controlled environment, e.g. a laboratory or office environment, 48 hours should be enough to demonstrate control and conformity.