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The O2D2-2G is equipped with AUDIO-VISUAL ALARMS and ALERTS designed to bring to the user’s
attention to potential malfunctions of the unit. Read the following for specifics.
ALARMS AND ALERTS
POWER UP
POWER-UP:
Red Light
flashing on and off with audio chime for ~ two (2) seconds with each initial power-up with pulse
of O2 for about 1/2 second. At Power UP, the Battery monitoring circuit requires several seconds to properly assess the condi-
tion of the Batteries.
Therefore observe the unit for several seconds after Power Up to watch for signs of a
Low or Bad Battery condition.
O2 DELIVERY or NON-DELIVERY:
Normally one flash of the LED
Green Light
(~1/4 second minimum) will flash for each
pulse of oxygen with a valid inhalation event with properly connected oxygen lines.
NOTE:
The O2D2
FLOW-FAULT
(see
FLOW-FAULT
below) indicator will not function as an out-of-oxygen warning if the pressure
in the oxygen cylinder is 500 psi or less. There may be pressure in the oxygen line but not enough to activate the Pulse-Demand
unit, consequently...no FLOW-FAULT warning. Prior to flying, using the cylinder chart, the pilot should estimate his flight altitude
and time to determine the amount of oxygen that he or she will need. It is better to have more than your estimated need. If a
pilot consistently flies above 18,000 feet, the aircraft should have a supplementary gauge, visible during flight by the pilot, to
determine the cylinder oxygen pressure. You should also carry an EOS (Emergency Oxygen System) such as the MH Co-Pilot as
a back-up safety feature in case the other system stops working. It is the absolute responsibility of the pilot to determine that
there is an adequate amount of oxygen pressure in the oxygen cylinder prior to his flight, as well as an emergency back-up in
case of a system failure.
THE OXYGEN SYSTEM MUST BE CHECKED AND TESTED ON THE GROUND BEFORE THE
FLIGHT.
O
2
DELIVERY or NON-DELIVERY
FLOW-FAULT EVENT:
The LED
Red Light
will flash on and off along with a Hi-Lo audio chime for ~ 2 seconds with every
event.
NOTE:
The
FLOW-FAULT
is not intended as a low or out-of-oxygen warning. It is only intended
to warn the pilot that there is no oxygen flowing to the EDS O2D2 unit. This typically means that the cylinder valve was not
opened, the supply line has been pinched closed, is plugged up or has come off, or the valve in the O2D2 has failed to open.
FLOW FAULT EVENT
APNEA EVENT:
Flash
Amber Light
four (4) discrete times with audio beeps once every four (4) seconds until unit detects
a valid inhalation event. Time before Apnea event is ~30 ~35 seconds. This typically occurs for the following reasons:
(1)
The
user has quit breathing for 30 - 45 seconds or the cannula/face mask is improperly worn.
(2)
The outlet tube from the O2D2 to the mask or cannula has become disconnected.
(3)
The outlet tubing has become
pinched closed or is plugged off.
The apnea alarm can be used as a “put-your-oxygen-on” alarm once you get to the
preset D mode altitude (D5 or D10). In this case, the alarm will not sound if you already have the cannula or face
mask on properly.
APNEA EVENT
LOW BATTERY-1:
Depending on battery condition,
one short flash of the Red Battery Light once every
two (2) seconds, no sound
. The unit will continue to operate properly for about four hours @ 77°F (25°C)
after the indicator starts to flash. The O2D2 will operate for ~ 50 hours with a fresh set of DURACELL ULTRA alkaline
batteries under normal operation.
LOW BATTERY-1
(First Warning)
LOW BATTERY-2:
One short flash of the
Red Battery Light once every second, with chirp sound
. When this
alarm occurs, the unit may operate for about 60 minutes, then the oxygen flow will stop and may go into the
Bad Battery
Mode
.
BATTERIES SHOULD BE REPLACED IMMEDIATELY.
LOW BATTERY-2
(Second Warning)
BAD BATTERY:
The batteries are too low to operate the unit, and it will no longer dispense oxygen. The
Battery Light
may or may-not be red or green, but User 1(Pilot) and User 2 LED’s will alternately flash
Red
about two times a second.
BATTERIES SHOULD BE REPLACED IMMEDIATELY!
BAD BATTERY
