ASTM F1977-04 (2017)
Standard test method for determining the initial fractional filtration efficiency of a vacuum cleaner system, with or without the motor emissions mathematically removed in the calculation of efficiency.
Products That Can Be Tested
- Household and commercial (tank-type)
- utility vacuum cleaner systems.
The initial fractional filtration efficiencies of the entire vacuum cleaner system, at six discrete particle sizes (0.3, 0.5, 0.7, 1.0, 2.0, and >3μm) is derived by counting upstream challenge particles and the constituent of downstream particles while the vacuum cleaner is being operated in a stationary test position. The vacuum cleaner system is tested at the nozzle with the normal airflow rate produced by restricting the inlet to the nozzle adapter with the 1¼ – in orifice. The system is tested with a new filter installed, and with no preliminary dust loading. The fractional efficiencies determined by this test method shall be considered initial system filtration efficiencies. The filters are not changed between test runs on the same cleaner.
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