MH
OPERATING MANUAL
for the
EDS
Model

D1
Electronic oxygen Delivery System
Featuring our Pulse-Demand technology
Patent Pending
R 1.7
AUDIO
D5
D10
D12
D MODES
Unit active
at and
abov e
s elect ed
pressure
altitudes
MADE IN USA
P ATENT P ENDI NG
PULSE UNITS
N MODE
Unit activ e at
all pressure
altitudes
Oxygen Inlet
O u t l e t
!
3 0
2 5
2 0
1 5
1 0
5
0
H
M
EDSMODELD1
This single person SBA oxygen delivery device is intended for
supplemental breathing while exposed to high altitudes. On
demand and up to 25 BPM, this device delivers a pulse of
supplied oxygen at the start of each inhalation phase. Higher
altitudes are automatically compensated with larger pulses.
AIRCRAFT PILOTS SHOULD REFER TO FAR 23.1447
CONSULT MANUAL FOR PROPER DEVICE USAGE
DEVICE WILL NOT OPERATE PROPERLY UNLESS SPECIFIED
CANNULAS, FACE MASKS & REGULATORS ARE USED
Not intended for SCBA, SCUBA or MEDICAL use
M
ou
nta
in H
igh E&S Co. USA
MH
Aviation
Oxygen Systems
Since 1985
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4
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10
0 Basic Safety
The EDS Oxygen system is intended to deliver pure oxygen for the purpose of
supplemental breathing and not intended for medical use. Pure oxygen is a highly
oxidizing gas in nature and can vigorously accelerate combustion. It can provide a
catalyst for spontaneous combustion and may cause personal injury or death if not
used properly and with caution. DO NOT use any type of oil or grease on any of the
fittings, valves or cylinders. DO NOT use the system while smoking or near an open
flame.
NOTICE OF NON LIABILITY
This device/equipment is classified as, and only suitable for use as, a supplementary breathing
apparatus (SBA) or a component/part thereof. It is intended to help supply the needed amount of
oxygen for persons during excursions at high altitudes where supplemental oxygen is advised or
needed. This device/equipment is not suitable for any type of life support operations. This
device/equipment is not suitable for SCBA (Self Contained Breathing Apparatus) or SCUBA
(Self Contained Underwater Breathing Apparatus) or any Medical operations.
It is the responsibility of the user, who will use this device/equipment and who is of sound mind
and body with good judgment, to become familiar with the operation and safety aspects of this
device/equipment, through the supplied manuals and documentation, before it is put to use.
Mountain High E&S Company assumes no responsibly for any accidents, injury or death that may
result from the misuse of this device/equipment. This includes any usage of this device/equipment
outside the scope of common sense and detailed in the operations and safety manuals, inserts and
other related documentation.
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
W a r r a n t y
Mountain High Equipment & Supply Co. warranties your EDS-D1 unit/system against defects from materials and
workmanship for long as you own and use it. The conditions are simple; should any part of the system become
defective, ship it to us and we will repair or replace it free of charge (you pay only shipping). This warrantey is only
valid if Mountain High Equipment & Supply Co. has determined that the system or any of its components have not been
damaged from being used improperly, submerged in fluids, dismantled or used in an abusive or unsafe manner.
Mountain High E&S Co. reserves the right to determine if repairs are to be done under warranty or at a nominal charge.
Before this warrantey can be valid Mountain High Equipment & Supply Co. must have your owners guarantee &
registration form properly filled out and in our files.
Mountain High Equipment & Supply Co. is not liable for any property or personal damage caused by misuse of the
system or cylinder. Operating conditions including, but not limited to cylinder and system pressure and ambient
conditions must be considered when refilling cylinder and using the system. Improper use could possibly cause cylinder
failure and lead to possible property damage and personal injury.
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * INTRODUCTION
Like our original EDS-A1 Electronic oxygen Delivery System (Analog Computer) the EDS-D1 (Digital
Computer) oxygen system with our Pulse-Demand technology is a single person aviation oxygen delivery system
designed to maximize the administration of oxygen into the human body in the most efficient, comfortable and
convenient way. With new user selectable settings, total apnea alarm and smaller size the new EDS-D1 provides
the same reliable operation that users of the EDS-A1 have come to rely upon and more. The EDS-D1 operates on
known physiological facts that the breathing cycle of a healthy, non-smoking person is such that about one-third of
the time is spent inhaling while two-thirds is spent exhaling and pausing. In addition, between 2/3 to 3/4 of the
volume of air holding oxygen inhaled is not used but is simply exhaled. The human lungs, for their size, are
relatively inefficient compared to other life-support organs. Lungs have to be the most adaptable and are most
easily stressed at altitudes resulting in a reduced efficiency effecting the entire body within seconds. This is partly
because only a fraction of inhaled air, holding oxygen, actually gets to the oxygen absorbing alveolar of the lungs.
The rest is spent in the so-called dead-spaces, i.e. trachea, bronchus, and other areas not directly contributing to
oxygen absorption, where it simply goes unused. Only about 25% to 30% of the oxygen inhaled in a given volume
of air is actually absorbed into the bloodstream. The rest is simply exhaled back out. Studies have shown that
oxygen being delivered only at the very beginning of inhalation
cycles acts better than a constant-flow system. This is because the
EDS-D1
provides oxygen as a bolus at a slightly higher pressure than
ambient that is first to lead into the most functional part of the lungs,
allowing optimum oxygen absorption during times of high altitude
excursions where oxygen is less per volume of air and the absolute
(atmospheric) pressure is lower.
HOW IT WORKS
The EDS-D1 monitors micro-pressures induced from inspiration
efforts. In turn it delivers a precisely metered pulse of oxygen at the
instant inspirations are detected but not during exhalation, pausing or
talking. Ongoing tests are showing that 90% of the oxygen the EDS-
D1
provides to the lungs goes directly into the blood. The EDS-D1
"synchronous inhalation pulse-demand technique" is currently the
most efficient way known by respiratory physiologists to saturate the
blood to well over 90% while using as little as one-tenth the oxygen
over standard constant-flow systems. Field tests with soaring flights
have yielded savings of up to ten times over the conventional delivery
protocol of 1 liter/min. per 10,000 feet. The average user should, however, see an average of 4 to 6 times savings
over constant-flow systems. The EDS-D1 utilizes well known physiological facts providing the smallest, lightest
yet most efficient aviation oxygen system available. Precious oxygen is simply wasted with constant flow systems.
Because of this, many pilots wait until some sort of indication of hypoxia is detected before they begin to use their
limited supply. That is, if the person recognized his indications for hypoxia in the first place. This almost always
results in being well behind the oxygen saturation curve from the start. The EDS-D1 will allow one to use oxygen
at the point where it is needed without the worry of running out before higher altitudes are achieved. The EDS-D1
is intended to be used with regulators and cylinders provided by Mtn. High. Any other cylinder with a near-
compatible fixed-flow or adjustable oxygen regulator may be used. Pilots who intend to fly with the EDS-D1 are
advised to become familiar with the system. The cannula can be used for flight operations up to 18,000 ft. MSL.
which takes advantage of the natural moisturizing exchange mechanism the sinus membranes provide. This will
help prevent so-called "dry-mouth or cotton-mouth" that is associated with diluter demand delivery units or
standard constant-flow delivery protocols. Although the EDS-D1 has shown that it can provide the needed oxygen
with a cannula at pressure altitudes well over 32,000 f