§ 84.180 Particulate loading test—PAPR series PAPR100–N and PAPR100–P filtration.
(a) Twenty filters of each powered air-purifying particulate respirator design will be tested for filter efficiency against:
(1) A solid sodium chloride particulate aerosol, in accordance with paragraph (d)(1) of this section, if series PAPR100–N approval is requested by the applicant.
(2) A dioctyl phthalate or equivalent liquid particulate aerosol, in accordance with paragraph (d)(2) of this section, if series PAPR100–P approval is requested by the applicant.
(b) Prior to filter efficiency testing of 20 series PAPR100–N filters, the 20 to be tested will be taken out of their packaging and placed in an environment of 85 ±5 percent relative humidity at 38 ±2.5 °C for 25 ±1 hours. Following the pre-conditioning, filters will be sealed in a gas-tight container and tested within 10 hours.