Code of Federal Regulations Title 42. Public Health § 42.84.304 Capacity test requirements

(a) NIOSH will conduct the capacity test on a total of 8 to 10 of the units submitted for approval, as follows:

(b) The capacity test will begin upon the first inhalation from or exhalation into the unit.

(c) Each unit will be tested at a constant work rate, depending on the capacity value specified by the manufacturer, according to the requirements specified in Table 2. All volumes are given at standard temperature (0 C) and pressure (760 mm Hg), dry, unless otherwise noted.

(d) NIOSH will rate an approved CCER using the appropriate capacity rating, as specified in Table 2.

(e) NIOSH will document the least value achieved by the seven units tested using the breathing and metabolic simulator. NIOSH will quantify this value of achieved capacity within an increment of 5 liters, rounding intermediate values to the nearest lower 5–liter increment.