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|  MIL-C-48868E (AR)
F=
Audiometer factor
F
=
W
=
Mass of
(g)
T
=
Temperature of condenser water (C)
Volume of gas in audiometer tube (ml)
V
=
Barometric pressure (mm Hg)
B
=
C
= Temperature correction (mm Hg), see paragraph
4.5.1.3.3.2
P = Vapor pressure of water over 33% w/w NaOH at T
(mm Hg), see paragraph 4.5.1.3.3.3
S = Local gravity & sea level values corrected to
standard values
Prepare samples as follows: Cut a specimen into 1/4 inch or
smaller squares. Dry to constant weight using microwave
moisture analyzer.
Displace the nitric oxide (NO) from the previous run by
aspirating the gases through the drain or venting through a
hood . Open the stopcock at the top of the audiometer tube and
carefully raise the leveling bulb until all the gas has been
expelled. Rest the bulb in its holder and stopper it. Loosen
the audiometer tube from the rubber stopper in the bottom of the
bath and drain the NaOH in the tube into the tank. Fill the
leveling bulb to 90% of its capacity and place the empty
audiometer tube back onto the rubber stopper and secure it.
Fill the audiometer to the 0.0 ml mark with the leveling bulb,
removing all air bubbles, close the stopcock, secure the bulb
and stopper it. Replace the 33% w/w NaOH as needed to maintain
a constant level in the tank.
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