MH EDS O2D2 User manual

1 or 2 Person
Electronic Digital
Pulse-DemandTM
Aviation Oxygen
Delivery System
Patent # 6,220,244
Other Patents Pending
MH EDS Model O2D2
INSTRUCTION MANUAL
800-468-8185
541-923-4100
Fax: [phone]
[email protected]
www.MHoxygen.com
2244 SE Airport Way, Suite 100
Redmond, OR 97756-7537 U S A
M
H
Aviation Oxygen Systems
MOUNTAIN HIGH
Equipment & Supply Company
4 mm Red inlet
connects to the
regulator
6 mm Blue outlets
connect to cannula or
face mask
Power On/Off and
Control Switch
(with read-out window)
LED indicator for
User 1(Pilot)
Audio port. Sound
from flow-fault and
apnea alarm
conditions only
(on bottom)
Static ports,
DO NOT
COVER
External 4.5 VDC
Power
Connector
(on bottom)
LED indicator
for User 2
6 mm Blue outlets
connect to cannula
or face mask
Static ports,
DO NOT
COVER
CONTENTS
INTRODUCTION ............................................................................. 2
FEATURES ...................................................................................... 2
BASIC SAFETY................................................................................ 2
GETTING STARTED ........................................................................ 3
INSERTING OR REMOVING THE BATTERIES................................. 4
REMOVING THE TUBING............................................................... 4
STORING THE MH EDS-O2D2 ....................................................... 4
MOUNTING THE MH EDS-O2D2 ................................................... 4
THANK YOU for purchasing the MH EDS O2D2 Pulse-DemandTM Oxygen Controller. The EDS Pulse-DemandTM
O2D2 is patented innovative oxygen control technology that allows you and your co-pilot to fly with safety and
comfort, knowing it will automatically give the exact oxygen required at the various altitudes. Although the
MH EDS O2D2 is designed for easy operation, PLEASE READ THIS INSTRUCTION MANUAL BEFORE USE.
WARNING: This MH EDS O2D2 is designed to operate with a maximum regulated pressure not to exceed
25 psi. If a regulator beyond this pressure is used, unit will be damaged and your warranty will be void.
MODE CONTROL SWITCH SETTINGS
AND MODES OF OPERATION ........................................................5
ALARMS AND ALERTS ..............................................................6
USING THE MH EDS-O2D2 WITH A THIRD-PARTY REGULATOR..6
TROUBLESHOOTING....................................................................... 7
WARRANTY .................................................................................... 7
SPECIFICATIONS ............................................................................ 8
5MD20-0001-01 Rev. 2
D-rings

2
BASIC SAFETY
INTRODUCTION
The patented MH EDS-O2D2 is a one or two-user aviation oxygen delivery device. It is designed to deliver aviation oxygen in
the most efficient, comfortable and convenient way possible. With its user-selectable settings, apnea alarm and small size,
the MH EDS-O2D2 is the most portable and flexible electronic digital oxygen delivery system in the world.
By providing a measured pulse of oxygen every time you breathe in, the MH EDS-O2D2 supplies the oxygen you need to stay
alert and comfortable while flying. In contrast to constant flow systems that waste oxygen by supplying more than your body
can use, the MH EDS-O2D2 provides a short pulse of oxygen as you inhale, ensuring that your oxygen is used most efficiently.
Efficient oxygen delivery means you can fly further on a single oxygen refill or save space and weight with a smaller tank. It
also makes it more feasible to enjoy the advantages of oxygen while flying below the altitudes where oxygen is mandated--
that can mean fewer headaches, increased alertness, and feeling less exhausted when you reach your destination.Your actual
oxygen usage will be determined by your breathing rate and physiological needs at altitude.
The programmability of the MH EDS-O2D2 means that, unlike constant-flow oxygen systems, you can “set it and forget it”.
By automatically detecting your pressure altitude, the MH EDS-O2D2 can be set to start providing oxygen immediately or at
a specified altitude and will automatically adjust the oxygen flow as your altitude changes. When you’re flying, don’t you
have more important things to do than adjust your oxygen flow during altitude changes?
PILOT #1 Blue 6 mm
outlet connects to
Pilot cannula or face mask
Audio port. Sound from
flow-fault and apnea
alarm conditions only.
(Page 8)
(on bottom)
Static ports,
DO NOT
COVER
FEATURES
External 4.5 VDC Power
Connector (Page 8)
(on bottom)
• Easy-to-use two-button control, small size and light weight
• Automatically adjusts oxygen flow with altitude
• Provides reduced oxygen consumption through more efficient oxygen delivery than standard constant-flow systems
• Push button control switch allows automatic altitude enable, Night and Day operations and high flow settings
• Green/Red LED’s indicate oxygen flow, alarm, and status
•Audible and visible apnea alarm informs user of kinked, pinched, or disconnected oxygen lines, obstructed cannula or mask
Red 4 mm inlet
connects to the
regulator
Power On/Off and
Mode Switch
#2 Blue 6 mm outlet
connects to Co-Pilot
cannula or face mask
Red/Green LED
indicator for
User 1 (Pilot) Red/Green
LED indicator
for User 2
Static ports,
DO NOT
COVER
•Reduced dry mouth and nose discomfort compared to constant-flow oxygen systems
Pure oxygen is a highly oxidizing gas and can vigorously accelerate combustion. It can provide a catalyst for spontaneous combus-
tion resulting in 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 smoke while in use. DO NOT operate near an open flame.
DO NOT use the MH EPS (External Power Supply) with the O2D2 as the voltages are not compatible.
2
D-rings

GETTING STARTED
The MH EDS O2D2 is designed to be used with MH Regulators. Pilots who intend to fly with the MH EDS O2D2 are advised
to familiarize themselves and their passenger with the system prior to using it. Four cannulas and two face masks are included
with the MH EDS O2D2 unit. The cannula may be used for flight operations up to 18,000 ft. Above 18,000 ft., a face mask
should be worn. A compatible face mask with a built-in microphone is available from Mountain High. (AMSKM-1100-01)
Tote Bags
(Qty 2)
Face Masks (Qty 2)
MH EDS-O2D2
Oxygen XCP
Input Tube
AA Batteries (Qty 3)
Cannulas (Qty 4)
2 standard, 2 flared tip
3M Dual-Lock™
Tape
Instruction
Manual
Comfortable cannula position, looped over
ears and the tab pointed down.
O2D2 with cannulas, regulator connection, regulator and cylinder
1. If you have not already done so, fill your cylinder with Aviation
oxygen. (Many FBOs offer this service.)
2. Inventory your system (see photo) and read the front label
on the unit.
3. Per the instructions provided with your cylinder and regulator,
attach the regulator to the cylinder and hand tighten only
(DO NOT use a wrench or pliers—the “O” ring
seals the regulator to the cylinder, over tight-
ening will damage the regulator).
NOTE:
Pressure in the regulator must be released
before the regulator can be removed from
the cylinder.
4. Open the battery cover on the back of the MH EDS-O2D2 unit,
install the 3 AA batteries (supplied) and replace the battery
cover. (NOTE: Batteries fit tightly, handle with care.) See
next page for detailed instructions.
5. If you are using the MH EDS-O2D2 with a Mountain High four
port regulator (FPR), locate the oxygen input tube (clear tube
with a short red tube on one end) and insert the Red tube
into the red “Oxygen In” connector on the MH EDS-O2D2 unit
until it stops (approx. 1/8 inch). Then connect the other end of
the tube to your regulator. If you are using a MH single port
regulator (XCR), use the tube that came with the regulator in
place of the tube that came with your MH EDS-O2D2.
6.Insert the Blue end of the cannula or face mask tubing into the
BLUE #1 Pilot “Out” connector on the unit. Always use the
#1 connector when only one (1) person will be using
the system. For a second user, insert the BLUE end
of the cannula or face mask tubing into the BLUE #2
connector. The Co-Pilot #2 connection becomes active when
inhalation is detected after a short period of inhalations.
CAUTION: DO NOT pinch the Cannula or Facemask
tubing when inserting them into the BLUE “Out”
connectors). Use only the supplied MH EDS can-
nula as other cannulas may not work properly
with the MH EDS-O2D2. DO NOT lengthen or
shorten the cannula tube.
7. Turn the cylinder valve on.
8. Push the “+” power/control button on the MH EDS-O2D2 unit
once. This will turn the unit on and set it to “N” mode. A start-
up pulse of oxygen, Red light and beeper test will verify battery
power.
9. Don the cannula or face mask (make sure the face mask
seals against the skin) and take a breath. The bright green
LED under the #1 should illuminate, and a pulse of oxygen
should be delivered. Refer to the card that comes with the can-
nula and face mask for donning information.
10. You are ready to fly. 3
Note: Passport not included

4
++
-
--
+
Remove the battery door by pressing down gently on the battery cover
flange then tip the door out and away from the unit. The EDS-O2D2 unit
uses 3 standard quality AA DURACELL ULTRA alkaline batteries. Insert the
batteries as shown (they will be a tight fit), then replace the door by set-
ting the bottom of the door in place and tipping the top in until it snaps in
place. Take care when removing and replacing the batteries to not damage
the batteries and/or connectors.
REMOVING THE TUBING
To Remove the tubing, push in slightly on the tubing, then
push in the connector collar while you pull gently on the
tubing to remove it.
DO NOT pull on the tubing without pushing in
the collar; it will damage the connector.
When not being used, the MH EDS-O2D2 unit, oxygen tubes, cannulas, etc., should be disconnected from the oxygen supply
and stored in a secure manner to ensure that dirt and debris do not become lodged in the inlet and outlet tubes. The supplied
tote bags or a zip-top plastic bag is a good storage container. If the unit is not going to be used for 30 days or more,
remove the batteries. When using the unit for the first time after storage, check the batteries to ensure proper
operation. A set of fresh spare batteries should be part of your pre-flight inventory.
DO NOT store the EDS unit while the inlet is under pressure. Remove all sources of oxygen pressure and secure
the unit to ensure it will not become damaged. If the lines are disconnected they must be covered so that debris, dust or dirt
can’t get in. If the supply line is left hooked to the system, make sure that it is first purged with clean dry air or oxygen before
the EDS unit is connected. If the lines are disconnected they must be covered so that debris, dust or dirt
can’t get in.
MOUNTING THE MH EDS-O2D2
You may mount the MH EDS-O2D2 unit to a suitable place using the sup-
plied piece of 3M DUAL LOCK tape. First, cut the piece of DUAL LOCK
tape in half, lengthwise, creating two long rectangles. Peel the protective
backing off one of the rectangles to expose the adhesive and apply it
to the back of the unit above the thumb indent for the battery door. DO
NOT COVER ANY PART OF THE BATTERY DOOR. When a suitable place to
mount the unit has been found, peel off the protective adhesive backing
and press the adhesive side to the chosen mounting area.
You may also mount the MH EDS-O2D2 by feeding 3/4”- wide straps
(not included) through the D-rings molded into the unit.
INSERTING OR REMOVING THE BATTERIES
STORING THE MH EDS-O2D2
1. Push in the collar
2. Pull the tube
straight back
while pushing
in the collar.
D-rings Battery
Door
3M Tape
Before
Dual-Lock
Apply
Dual-Lock
Battery
Door
D-rings
4

5
This last switch setting, R/M, for “Reserve” or “Manual” provides the maximum
pulsed-oxygen flow regardless of altitude.
Flow start: All altitudes Use with: Cannula or face mask
Flow amount: Maximum Pulse Altitude Compensating?: No
R/M: “Reserve/Manual”
The MH EDS-O2D2 unit is controlled by two push button control switches. A stop inside
the selector switch prevents inadvertently turning the unit off in flight.
MODE CONTROL SWITCH SETTINGS AND MODES OF OPERATION
N MODE: “Night” or “Now”
At this setting the MH EDS-O2D2 will immediately start the standard oxygen flow pro-
viding pulses of oxygen appropriate for an average healthy person using a cannula.
Flow start: All altitudes Use with: Cannula
Flow amount: Standard Pulse Altitude Compensating?: Yes
The D5 setting will cause the MH EDS-O2D2 unit to delay oxygen flow until it senses
a pressure altitude of 5,000 ft. and above. The D10 setting delays oxygen flow until
10,000 ft. and above. NOTE: When the barometric pressure is low, it will start operation
at a slightly lower flight altitude than when the barometric pressure is high.
Flow start: D5--5,000 ft., D10--10,000 ft. Use with: Cannula
Flow amount: Standard Pulse Altitude Compensating?: Yes
D MODES: “Day” or “Delayed”
Control switch settings
F MODES: “Floor” or “Face Mask”
The F mode settings (F5, F10, F15, and F20) are called the “Floor” or “Face mask”
settings. They supplement the standard oxygen flow by adding approximately the
selected number of feet (in thousands) to the MH EDS-O2D2’s perceived altitude.
Flow start: All altitudes Use with: Cannula or face mask
Flow amount: Enriched: Altitude Compensating?: Yes
F5 =Standard+5,000 ft
F10=Standard+10,000 ft
F15=Standard+15,000 ft.
F20=Standard+20,000 ft.
Example: If you are at a pressure altitude of 5,000 ft. and select the F10 setting you
will receive the effective flow rate of 5,000 + 10,000 = 15,000 ft. The “F” modes are
useful for people for whom the standard oxygen supply does not achieve the desired
blood oxygen saturation or for those who prefer to use a face mask rather than a
cannula.
F15
N
OFF
R/M
D10
Advance
(+)
Push Button
Reverse
(-)
Push Button
The MH EDS-O2D2 has three main modes of user controlled operation:
1. Fully-Automatic (D5, D10)
2. Semi-Automatic (N and F modes)
3. Manual (R/M)
NOTE: The N and D modes are designed to provide the amount of oxygen needed by an
average size and healthy person using a cannula at the given altitudes; your needs may
be different. To determine whether you are receiving enough oxygen in a particular mode
you will need to use a pulse oximeter (available from Mountain High) to determine your
blood oxygen saturation (goal is 90-100%) at any given altitude. The selected MH EDS-
O2D2 mode applies to both users and should be set to accommodate the user with the
highest oxygen need. In all modes except R/M, the O2D2 provides a pulse of oxygen which
increases with altitude, I.e., it is altitude compensating.
Switch as seen in the
”OFF” setting
5

6
6
The MH EDS O2D2 is equiped 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
O2for about 1/2 second.
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.
O2DELIVERY 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, or the supply
line has been pinched closed, or 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 MH EDS-
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
USING THE MH EDS-O2D2 WITH A THIRD-PARTY REGULATOR
LOW BATTERY -1: Depending on battery condition, one short flash of the Red Light once every second, no sound. The
unit will continue to operate properly for about four hours @ 77°F (25°C) after the indicator starts to flash. The EDS-O2D2 will
operate for ~ 100 hours with a fresh set of DURACELL ULTRA alkaline batteries under normal operation.
LOW BATTERY-1 (First Warning)
LOW BATTERY -2: Two short flashes of the Red Light once every second, no sound. When this alarm occurs, the unit may
operate for about 45 to 60 minutes, then the oxygen flow will stop and may go into the Bad Battery Mode. BATTERIES
SHOULD BE REPLACED IMMEDIATELY. The EDS-O2D2 will operate for ~ 100 hours with a fresh set of DURACELL ULTRA
quality alkaline batteries under normal operation.
LOW BATTERY-2 (Second Warning)
BAD BATTERY: Flashing Red Light on and off at a one (1) second rate with unit locked out, no sound.
BATTERIES SHOULD BE REPLACED IMMEDIATELY!
BAD BATTERY
If the EDS-O2D2 will not be used with a MH Regulator, the alternate regulator must be able to deliver a
pressure of between 15 and 25 psi (static). If the above listed pressure specifications are not met, the EDS-
O2D2 may not operate correctly. Lower pressures will result in an inadequate volume of oxygen. Higher pressures will
result in a too high volume of oxygen. Excessively high pressures will cause the valve to open spontaneously and leak oxygen.
To use the MH EDS-O2D2 with a third-party regulator or built-in oxygen system with a pressure higher than 25 psi, it is
mandatory that you use the MH EDS IN-LINE REGULATOR (00REG-1048-00) to ensure correct flow pressure. The EDS-ILR goes
between the third-party regulator or built in system and the MH EDS-O2D2 to reduce the flow pressure to an appropriate level.

7
LIMITED WARRANTY
This device is classified as, and is only suitable for use as, a supplementary breathing apparatus (SBA) for aviation use. It is intended to
help supply the needed amount of oxygen for persons during flight altitudes where supplemental oxygen is needed. This device is not
suitable for any type of life support operations. This device is not suitable for SCBA (Self Contained Breathing Apparatus), SCUBA (Self
Contained Underwater Breathing Apparatus) or any medical operations.
Before it is put to use, it is the responsibility of any user who will use this device to become familiar with the operation and safety aspects
of this device. Using the system improperly could cause failure and lead to possible property damage and/or personal injury.
Mountain High Equipment & Supply Company assumes no responsibility for property damage, accidents, injury or death that may result
from the misuse of this device/equipment. This includes any use of this device/equipment outside the scope of common sense, the
Instruction Manual, inserts and other related documentation.
NOTICE OF NON-LIABILITY
The O2D2 unit emits no sound or start-up oxygen pulse when turned on:
1. Check batteries to make certain they are fresh.
Start-up sound is heard, but no start-up oxygen pulse delivered:
1. Check oxygen cylinder valve is open.
2. Check oxygen supply tube for proper connection.
3. Check oxygen supply tube for obstructions.
4. Check O2D2 outlet tubing for obstructions.
The O2D2 does not trigger:
1. Try using the Flared-Tip cannula included with the kit (MH part number 00EDS-1084-01)
When using the face mask, no oxygen pulse on inhalation:
1. Make sure the face mask is sealed against the skin.
2. Check for obstructions on the O2D2 outlet tubing.
3. Use only face masks provided by Mountain High Equipment & Supply.
NOTE: EDS face masks DO NOT have a dilution bag attached
Oxygen pulses are delivered, but an alarm is heard at the same time:
1. Check the battery to make certain it is fresh.
2. Check for obstructions in the cannula/mask and tubing.
3. Use only masks and cannulas supplied by Mountain High Equipment & Supply.
TROUBLESHOOTING
•
•
•
•
•
WARNING
DO NOT
increase or decrease
length of cannula
or face mask supply
tubing.
DO NOT
use the MH EPS
(External Power
Supply) with the
O2D2 as the voltages
are not compatible.
Mountain High Equipment & Supply Company warrants your MH EDS-O2D2 unit against defects in materials and workmanship for two (2)
years from date of purchase invoice. The warranty is non-transferable. Should any part of the MH EDS-O2D2 become defective within the
warranty period return the EDS Unit with a description of what/why it is not functioning and we will repair or replace it, at our discretion,
free of charge (you pay only shipping to MH). Contact www[email protected] for RMA# and Return Form
Return the Unit to:
Mountain High Equipment and Supply Company
RRO Department
2244 SE Airport Way, Suite 100
Redmond OR 97756-7537
This warranty is non-transferable and only valid if Mountain High Equipment & Supply Company determines that the system and its
components have not been damaged due to improper use, been submerged in fluids, dismantled or abused. Mountain High Equipment &
Supply Company reserves the right to determine if repairs are to be done under warranty or at a nominal charge. To activate warranty
coverage, you must complete and return your owner’s enclosed EDS Registration Card.
7

8
SPECIFICATIONS
5MD20-0001-01 Rev. 2
Allowable respiration rates: Adaptive: up to 43 bpm. And down to ~ 5 bpm. (two persons independently)
Apnea time-out envelope: Adaptive: ~40 sec Pa. 0-12 K ft., ~30 sec. Pa. 13-18 K ft., 20 Sec. at and above Pa. 18 K ft. Apnea
alarm does not respond if in any of the ‘D’ modes and while below that pressure altitude threshold.
Operating inlet pressures: 15 psig. (1 bar) DYNAMIC (flowing) through cannula and 1.5 meters (5 ft.) of 4 mm. inlet tubing.
25 psig. (1.72 bar) .
Operating & storage temperatures, altitudes, vibration @ humidity, (assumes nominal operating voltage):
Temp range @ ~10% RH: -40° to +60° C. (Storage for complete unit less battery)
Temp range @ ~25% RH: 0° to +60° C. (Operating with std. valve)
Temp range @ ~100% RH NC: +5° to +60° C. (Operating with std. valve) Unit is not water-proof, keep it
dry from spray & rain.
Altitudes @ up to ~100% RH: -100 to +30 K ft. Pressure Altitude range @ +5° to +60° C. (Operating with std. valve)
Vibration: Random vibration 5 to 500 Hz, (15 minutes per axis @ 2.5 g. (rms) sin wave).
Physical characteristics (EDS-O2D2 unit only):
Width @ widest point: 4.21” (107 mm);
Height, including connectors: 3.73” (94.75 mm.);
Height, enclosure only: 3.18” (80.7 mm); Thickness, front to rear: 1.25” (31.75 mm)
Weight: 11.2 Oz. (0.317 kg.) with batteries
Operating Voltage & Current @ 25° C. @ ~25% RH.
(Measured in the ‘N’ mode setting @ 15 RESP/ typical.):
Battery types: 3 ea. Standard 1.5 volt alkaline type ‘AA’ or equivalent. Use only alkalinetype bat- teries.
Battery Life: 100 to 150 Hrs. @ ~25° C. @ ~25% R.H. Measured from mean, assuming fresh alkaline batteries
operating under normal operating conditions.
Make certain quality alkaline batteries are used. Removed during long-term storage.
External Power: 4.5 VDC external power jack with auto battery disconnect with series diode is provided. No internal
regulation or over voltage protection is provided.
External Audio output: 3.5 mm stereo type jack provides audio output at ~40 mv. RMS into 5KΩL&R independent.
Suitable for most aircraft Integrated Communication Systems (ICS).
Nominal battery voltage: ~4.25 VDC @ 4.30 ma. Idle. 220 ma. Peak (~500 ms. max), 3.25 ma. Average.
Min. start-up voltage: ~2.80 VDC ± 0.1VDC.
Low-battery cut-out: < 2.5 VDC ± 0.1VDC. (Red light on steady unit in non-responsive state ‘dead’)
Very low battery signal: ~3.0 VDC ± 0.1VDC. (Red light winking 2/sec.) ~5 Hrs. of service left.
Low battery signal: ~3.3 VDC ± 0.1VDC. (Red light winking 1/sec.) ~12 Hrs. of service left.
Notes:
The low battery cut-out feature provides a known state of action if the batteries are depleted to the point
of inadequate power to operate the unit to any of the declared specifications. In addition, this feature
was found to be prudent because, while many of the specifications may stay intact, false triggering of
the valve may confuse the operator of a problem other than low batteries. The minimum ‘start-up’ volt-
age is where the unit will initiate the built-in test and commence operations. However, it should be noted
that, during this operation, if the batteries are then measured to be too low the lock-up feature may then
shortly ensue. This should help the operator in determining if the unit is bad or if the batteries are too
low. A unit that has low batteries that cause ‘lock-up’ will most likely initially start-up if left off for some
time. Alkaline type batteries have so-called self-rejuvenating properties that may cause the user to stall
battery replacement. Obviously, dead batteries will yield no action.
The O2D2 Specifications, performance standards and limits are derived from actual units tested,
characterized or calculated. Specifications are subject to change without notice.
Height
Width
16 mm
Depth
8