Division 4 Dust pick-up

United Kingdom

The dust pick-up on hard floor (dpu_hf ) shall be the determined as the average of the results of the two cleaning cycles in a hard floor test.

The dust pick-up on carpet (dpu_c ) shall be the determined as the average of the results of the cleaning cycles in a carpet test. To correct for deviations from a test carpet’s original properties, the dust pick-up on carpet (dpu_c ) shall be the calculated as follows:

{dpu}_{c} = {dpu}_{m} \times (\frac{{dpu}_{cal}}{{dpu}_{ref}})

where:

dpu_m is the measured dust pick-up of the vacuum cleaner;
dpu_cal is the dust pick-up of the reference vacuum cleaner system measured when the test carpet was in original condition;
dpu_ref is the measured dust pick-up of the reference vacuum cleaner system.

Values of dpu_m for each of the cleaning cycles, dpu_c, dpu_cal and dpu_ref shall be included in the technical documentation.