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This Part of BS 7258 specifies minimum safety requirements for general purpose laboratory fume cupboards and describes the methods of test to be used to determine their performance.
This British Standard is not intended to cover fume cupboards for special applications such as carrying out work on radioactive materials, perchloric acid, etc. or for work where large quantities of heat are released.
This standard is applicable to fume cupboards for some special applications but such fume cupboards also have to conform to additional requirements, appropriate to specific hazards of the particular application, which are not covered in this specification.
This standard is not applicable to microbiological safety cabinets for which requirements are specified in BS 5726.
The changes from the previous edition include the following:
a) changes to the measurement grid for both the type test and the commissioning test, making the grid for the latter a subset of the grid for the former, thereby facilitating direct comparison;
b) the addition of annex D, describing a method for the determination of average face velocity with reduced accuracy for routine maintenance.
BS 7258-1: 1994 : Laboratory fume cupboards — Part 1: Specification for safety and performance