Cessna TR182 1979 Pilot Operating Handbook page 208

OXYGEN SYSTEM
MODEL TR182
PILOT'S OPERATING HANDBOOK
SUPPLEMENT
microphone jack so that the adapter cord from the oxygen
mask microphone can be plugged into the jack), A switch
is incorporated on the left hand control wheel to operate
the microphone,
A remote shutoff valve control, located adjacent to the pilot's oxygen
outlet, is used to shut off the supply of oxygen to the system when not in
use. The control is mechanically connected to the shutoff valve at the
cylinder. With the exception of the shutoff function, the system is com-
pletely automatic and requires no manual regulation for change of alti-
tude.
The oxygen cylinder, when fully charged, contains approximately 48
cubic feet of oxygen, under a pressure of 1800 psi at 70
D
F (21
DC).
Filling
pressures will vary, however, due to the ambient temperature in the filling
area, and because of the temperature rise resulting from compression of
the oxygen. Because of this, merely filling to 1800 psi will not result in a
properly filled cylinder. Fill to the pressures indicated in figure 1 for
ambient temperature.
WARNING
Oil, grease or other lubricants in contact with oxygen
create a serious fire hazard, and such contact must be
avoided when handling oxygen equipment.
AMBIENT FILLING
TEMPERATURE
PRESSURE
OF
PSIG
0
1600
10 1650
20
1700
30
1725
40
1775
AMBIENT
FILLING
TEMPERATURE PRESSURE
OF
PSIG
50 1825
60
1875
70
1925
80
1975
90
2000
Figure 1. Oxygen Filling Pressures
2 1 October 1978