Embraer EMB145 Operation Manual page 2186

OXYGEN
OXYGEN CONSUMPTION CHART
The Oxygen Consumption Chart is provided to allow the Flight Crew to
know the remaining number of pre-flight oxygen mask tests available
before the oxygen cylinder recharging is necessary. This chart should
be used by the maintenance personnel to choose the best moment to
recharge the oxygen cylinder.
The Oxygen Consumption chart has been plotted for 21°C (70°F)
conditions. For
Correction chart must be used to obtain the pressure at 21°C and then
see what is the number of the remaining oxygen mask tests.
EXAMPLE
Associated condition:
Crew................................................................. PILOT, COPILOT,
Indicated Gauge Pressure ............................... 1750 psi
Cylinder Compartment Temperature ............... 30 C
According to the Oxygen Pressure Correction chart, for the associated
conditions, the pressure for 21°C is 1700 psi.
According to the Oxygen Consumption chart, for 1700 psi there are
approximately 22 remaining pre-flight tests before recharging the
oxygen cylinder becomes necessary. The airplane's dispatch being
therefore allowed.
Page
4
2-16-30
AIRPLANE
OPERATIONS
MANUAL
different temperatures,
Code
01
the Oxygen
AND OBSERVER
REVISION 36
Pressure