84.161—Man test for gases and vapors; Type B and Type BE respirators; test requirements.
(a)
The completely assembled respirator will be worn in a chamber containing 0.1 ±0.025 percent isoamyl acetate vapor, and the intake of the hose, and not more than 25 percent of the hose length will be located in isoamyl acetate-free air.
(b)
The man in the isoamyl acetate atmosphere will draw his inspired air through the hose and connections by means of his lungs alone.