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Manufacturers’ test procedures for packaged units take several forms:
1. Rating test data on the prototype, which forms the basis for thepublished capacity and application leaflets.
2. Rating check tests on a proportion of production units, to verifythat standards are being maintained.
3. Function tests on all production units, to verify correct operationof components.
4. A short running test at normal conditions to check for reliabilityof operation plus, possibly, an approximate capacity check. Thiswill not be possible on some types.
5. Safety tests at maximum operating conditions – usual on all ora high proportion of production units.These test schedules are costly, requiring expensive equipment,and are reflected in the anticipated high quality.Factory records will be kept of all such tests and, in the case oflarger units, manufacturers will, if asked, provide a certified copy ofthe test on the equipment supplied.
