12.2.1 The suit tester, wearing the supplied-air suit, should enter the test chamber
containing a nontoxic test agent and should attach the breathing air hose to
the fitting inside the chamber that is connected to the source of air. The suit
tester should connect the tubing leading from the probe inside the helmet of
the supplied-air suit to a fitting located inside the chamber that is connected
to the equipment utilized to detect aerosol concentration.
12.2.2 The suit tester should carry out the following series of exercises, and the test
operator should ensure that the recorder attached to the aerosol-monitoring
equipment records the penetration of aerosol into the helmet of the supplied-
air suit during each exercise. Each exercise should be carried out for at least
120 sec (2 min) or until no further increase in aerosol penetration is observed
for at least 30 sec (0.5 min):
a. Standing still, arms hanging downward along the sides of body, normal
b. Bending forward and touching toes repeatedly.
c. Running in place (or use of a treadmill).
d. Raising arms above head and looking upward repeatedly.
e. Bending the knees by squatting repeatedly.
f. Crawling on hands and knees.
g. Standing with arms folded in front of chest and twisting torso from side to
h. Standing still, arms hanging downward along sides of body, normal
12.2.3 If one of the exercises listed in b, c, d, e, f, and g of 12.2.2 results in a
penetration of aerosol (greater than 1 percent) into the helmet, the suit tester
should stand still with his arms hanging downward along the sides of his
body and breathe normally for 120 to 180 sec. (2 to 3 min.) or until
penetration returns to that measured during exercise a., to purge the aerosol
inside the helmet of the supplied-air suit.
12.2.4 If the penetration of the aerosol into the helmet of the supplied-air suit
exceeds 10 percent, the test should be terminated to prevent undue exposure
of the suit tester to the aerosol.
12.2.5 After the exercises described in 12.2.2 b, c, d, e, f, and g have been carried
out by the suit tester, the test operator should stop the flow of air to the
supplied-air suit, and the test subject should continue to stand still with his
arms hanging downward along his sides and breathe normally. The test
operator should observe the increase in penetration of the aerosol into the
helmet of the supplied-air suit, and record the time between the termination