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D MODES
"Day" or "Delayed" modes
The next three advancing settings are the D5, D10 and D12. These are the D for "Day" or "Delayed" modes.
The D5 setting will cause the EDS-D1 unit to delay responding to breathing actions until it senses a pressure
altitude of 5,000 ft. and above. The D10 setting operates respectively. The D12 setting is calibrated to start
operation at a pressure altitude of
about 11,000 ft. ±250 ft. This lower
trip-point setting is intentional so the
unit will comply per FAR part
23.1447 throughout a wide range of
barometric pressures. For example,
because the EDS-D1 unit has no user
adjustments for changes in
barometric pressure, it operates
simply from pressure altitudes such
as your body does. Therefore, if the
unit is being used while the
barometric pressure is low, it will
start operation sooner (at a lower
MSL flight altitude) than it will if the
barometric pressure is high. Therefore, the EDS-D1 is calibrated to trip a bit low to keep the D12 setting from
never violating the current FAR 23.1447 for oxygen use at 12,500 ft. MSL. The D5 is calibrated for a pressure
altitude of 5,000 ft. and D10 is calibrated for a pressure altitude of 10,000 ft.
3 0
2 5
2 0
1 5
1 0
5
0
PRESS ALT X 1K
PULSE UNITS
D 5
D 1 0
D 1 2
D Modes
Unit delays
activation
until at and
above
selected
pressure
altitudes
D12
Switch as seen in one of the
"Day" or "Delay" settings.
N MODE
"Night" or "Now" mode
The first power on setting advanced from off is the N for "Night" or "Now" setting. At this setting the EDS-D1
will respond to breathing actions at all altitudes with the standard delivery protocol. The EDS-D1 will deliver
pulses of oxygen at the effective flow rate
of 1.0 liter/min. per 10,000 ft. for pressure
altitudes up to about 34,000 ft.
NOTICE
Using any of the on settings will result in
the correct (or more) amount of oxygen for
any given altitude. None of the on settings
will inadvertently result in inadequate
amounts of oxygen for any given altitude
in which the EDS operates.
N
Switch as seen set to
"Night" or "Now" mode
3 0
2 5
2 0
1 5
1 0
5
0
PRESS ALT X 1K
PULSE UNITS
N mode
Unit active at all
pressure altitudes
delivering more
with increasing
altitude.
A
B
C
A
B
C
Align tube
Push
Push tube
f i r m l y
Push
f i r m l y
Push in
collets
Pull tube
out while
pushing
collets
in about
1 cm.
To remove the polyurethane service
line you must push in the connector
collar while you pull on the
polyurethane line. Do not pull the
polyurethane line without pushing in
the collar. It will damage the
connector rendering it useless.
