CARER Medical Technology CR-P3W User manual

Medical Oxygen
Concentrator
User’s Manual
CR-P3W
CR-P5W
WARNING-Please read this User’s Manual carefully and understand it before using the
medical oxygen concentrator.
DANGER-Fire is strictly prohibited.

1
CONTENTS
Important Safety Information ........................................................................................................................2
Symbols and Definitions................................................................................................................................2
Overview........................................................................................................................................................3
Reason for a Physician to Choose Oxygen Therapy......................................................................................3
Scope of Application......................................................................................................................................3
Principle for Oxygen Concentrating..............................................................................................................3
Contraindications, Precautions, Warnings, and Instructions .........................................................................3
Main Structure ...............................................................................................................................................4
Important Spare parts of Oxygen Concentrator.............................................................................................4
Installation of Oxygen Concentrator .............................................................................................................6
Preparation before Operating the Oxygen Concentrator ...............................................................................7
Operation Instructions ...................................................................................................................................8
Alarm ...........................................................................................................................................................11
Repairing and Maintenance of Oxygen Concentrator .................................................................................12
Identifying and Removing Failures .............................................................................................................14
Specifications and Parameters .....................................................................................................................16
After-sales Services .....................................................................................................................................16
Environmental Protection ............................................................................................................................18
Graph of Oxygen Concentration Value and Fow Function..........................................................................18
Change of Oxygen Concentration with Flow under Different Pressure Conditions in the Altitude Range of
0-4000m.......................................................................................................................................................19
Electromagnetic Compatibility (EMC)........................................................................................................20
Supplementary Instruction...........................................................................................................................23
Storage and Transportation Conditions .......................................................................................................24
Service Life..................................................................................................................................................24
Packing List .................................................................................................................................................24

2
⚫Important Safety Information
Please read this User’s Manual before using the medical oxygen concentrator.
In order to prevent power outages or possible malfunctions of the oxygen concentrator,
those who are in urgent need of oxygen and critically ill patients must be provided with
other backup oxygen sources.
This oxygen concentrator is not intended to sustain or prolong life.
The important information in this manual is highlighted using the following terms:
DANGER: Emergency safety information, and may cause injury or death if ignored.
WARNING: Important safety information, and may cause serious injury if ignored.
CAUTION: Information aimed to prevent damage to the product.
NOTE: Information to which special attention must be paid.
NOTE: Important safety information is indicated in this manual. Please pay special attention to
all safety information.
DANGER-Fire is strictly prohibited.
NOTE: Please keep this Manual properly.
WARNING: In some cases, oxygen therapy can be dangerous. Consult your physician before
using an oxygen concentrator.
⚫Symbols and Definitions
Symbols
Definitions
Symbols
Definitions
NOTE! Check the accompanying
document.
Class II equipment
AC
Type B equipment
Fire is strictly prohibited.
Up
No rain
Fragile
┃
On
○
Off

3
⚫Overview
This Manual helps you to get familiar with how to use the oxygen concentrator. Please make sure that you
have read and understood this User’s Manual before using the oxygen concentrator. Important safety and
maintenance information is indicated in the instructions. Please pay special attention to all safety
information. If your oxygen concentrator is in fault, please contact a dealer authorized by CARER.
Danger: Oxygen can aid combustion. Do not smoke when the oxygen concentrator is turned on
or near someone who is working on it.
Do not use if there is any object with high temperature, sparks and open flames within 1.6 m.
⚫Reason for a Physician to Choose Oxygen Therapy
Nowadays, many people suffer from heart, lung and other respiratory diseases. Your body needs a steady
supply of oxygen to keep certain organs’ function. Your physician may ask you to supplement oxygen
because you cannot get enough oxygen from the indoor air. Supplementing oxygen can increase the total
amount of intaking oxygen in your body.
⚫Scope of Application
It is designed for oxygen making and oxygen therapy for patients with hypoxia at medical institutions and
families.
⚫Principle for Oxygen Concentrating
This machine is driven by ~220 V power. By using air as the raw material and a high-quality molecular
sieve, it produces high-purity oxygen conforming to medical oxygen standard by pressure swing adsorption
(PSA method) at normal temperatures.
⚫Contraindications, Precautions, Warnings, and Instructions
WARNING
➢Do not unplug the oxygen concentrator when the power switch is not turned off.
➢Do not use the oxygen concentrator while bathing.
➢Do not place or store the oxygen concentrator next to a bathtub or sink.
➢Do not touch the oxygen concentrator after it falls into water or liquid, and immediately unplug
the power. Do not use the oxygen concentrator again after it falls into water or liquid, and notify
a dealer authorized by CARER.
➢Do not place or store the oxygen concentrator in a kitchen or bathroom.
➢The oxygen concentrator should be placed away from pollution and smoke.

4
➢The air inlet of the oxygen concentrator should be located in a well-ventilated place.
➢It takes 5 minutes for the oxygen concentrator to start to reach the specified performance.
➢The oxygen concentrator should not be lubricated with oil, grease or other lubricants.
➢The performance of oxygen concentrator may be affected if any non-specified wetting bottles or
drug administration accessories are used.
➢The humidification bottle of oxygen concentrator shall be mounted at the optimal position for
the drug administration accessories. It shall be directly mounted at the outlet of the oxygen
concentrator.
NOTES:
➢It is recommended to assign a person to maintain the oxygen concentrator when using it.
➢Do not block the air inlet and outlet of the oxygen concentrator.
➢Do not disassemble the oxygen concentrator to prevent electric shock. If the oxygen concentrator
is in fault, please contact a dealer authorized by CARER timely.
➢When the oxygen concentrator is not in use, please unplug the oxygen concentrator from the
power socket.
⚫Main Structure
The medical oxygen concentrator is composed of a mainframe, a flow controller, a humidification bottle
and an oxygen concentration status indicator.
⚫Important Spare parts of Oxygen Concentrator
NOTE: Please get familiar with the oxygen concentrator before using it.
1
Power switch
2
Oxygen outlet
3
Nebulizing port
4
Humidification
bottle
5
Air filter cotton
cover
6
Power cord
7
Overload protector
8
Caster
9
Power indicator
light
10
Normal working
indicator
11
Low oxygen
concentration
indicator
12
Maintenance
indicator
13
Reminder
indicator for filter
replacement
14
Timing +
15
Timing -
16
ON / OFF
Button
17
Voice on and off
18
Nebulizing/oxygen
concentrating
switching button
19
Nebulizing
indicator
20
Flow
regulating
valve
21
Oxygen
concentration
indicator
22
Timing display
23
Cumulative time
display
24
Flow display

5
Fig. 1
Fig. 2
1
2
3
4
5
10
11
12
14
15
9
6
8
16
17
18
13
19
20
21
23
22
24

6
⚫Installation of Oxygen Concentrator
I. Put the oxygen concentrator in the place where you spend the longest time and near the socket. It can be
the living room, study, bedroom, etc. But please do not place or store it in the kitchen or bathroom.
DANGER: Do not put the oxygen concentrator at a place if there is any object with high temperature,
sparks and open flames within 1.6 m.
NOTE: Do not connect it to a wall outlet controlled by a switch. Do not have other appliances plugged
into the same wall outlet.
II. Place the oxygen concentrator at least 50 cm away from the wall, fabric or other objects. This will ensure
that a proper flow of air enters and leaves the oxygen concentrator. The oxygen concentrator should
be kept away from pollutants, smoke, and humidity.
III. It is recommended to use a nasal oxygen tube longer than 2 meters.
7

7
⚫Preparation before Operating the Oxygen Concentrator
I. Please check whether the air filter cotton (in the air filter cover of the oxygen concentrator) is clean before
using the oxygen concentrator every time. Please clean the air filter cotton every week when the
oxygen concentrator runs. It is recommended to shorten the cleaning time appropriately. How to
properly clean the air filter cotton is discussed on Page 12 of this Manual.
II. Please install the oxygen concentrator accessories following the steps below.
1. Connection of humidification bottle (model: SH-2):
Install the oxygen humidification bottle as follows:
a) Add purified water (or distilled water) to the upper and lower limits of the humidification bottle
(Fig. 3), and tighten the bottle cap.
b) Put the humidifier on the humidifier connection base of this product and tie up the magic stick
(Fig. 4). Please make sure that it is firmly installed.
Fig. 3 Fig. 4
NOTE: The amount of water added to the humidification bottle is between the
maximum and minimum water level marks.
Note: If you need to replace the humidification bottle, please contact a distributor
authorized by CARER for purchasing and replacing.
2. Nasal oxygen tube connection:
Connect the nasal oxygen tube to the oxygen outlet (Fig. 5).
Fig. 5
M A X I M U M
M I N I M U M
Upper limit
Lower limit

8
Note: The nasal oxygen tube and nebulizing device adopt 5-7 mm tubaeform interface.
It is recommended to use a nasal oxygen tube and nebulizing device with a medical device
registration certificate.
III. Take out the power cord completely from the strap, make sure that the "power switch" is off (Fig. 6),
and then insert the plug into the wall outlet (Fig. 7).
Fig. 6 Fig. 7
WARNING: Improper power cords and plugs may cause burns, fire, or other electric shock hazards. Do not
use an oxygen concentrator with a damaged power cord.
⚫Operation Instructions
Danger: Oxygen can aid combustion. Do not smoke when the oxygen concentrator is turned on
or near someone who is working on it.Do not use the oxygen concentrator if there is any
object with high temperature, sparks and open flames within 1.6 m.
I. Turn the "power switch" to the On (┃) position (Fig. 8), and then the power indicator will light up; after pressing the
"ON / OFF" button on the panel (Fig. 9) once more, the oxygen concentrator will start and the normal operation
indicator will light up.
Fig. 8 Fig. 9

9
If the oxygen concentrator does not operate normally, please refer to “Identifying and Removing Failures” on
Page 13 of this Manual. If necessary, please contact a dealer authorized by CARER.
II. Check the displayed flow (Fig. 10). If it is not the desired flow, you can press the flow + or - keys to
get the required oxygen flow (The maximum flow recommended by P3W is 3 L/min., and that
recommended by P5W is 5 L/min.)
Fig. 10
NOTE: Please adjust the oxygen flow following the doctor's advice.
III. In order to ensure the oxygen concentration and oxygen flow, this oxygen concentrator will undergo
quality inspection before delivery. As long as the cumulative time displayed (Fig. 11) is less than 10
hours, it is a normal new machine.
Fig. 11
IV. When the machine is in the running or standby state, press the “Timing +” or “Timing -” button on the
panel (Fig. 12) to make the machine in timing status (Fig. 13). Each time you press the “Timing +”
button, the timing time increases by 10 minutes; each time you press the "timing-" button, the timing
time reduces by 10 minutes. The maximum set time is 240 minutes. After the set time is over, the
machine enters the standby state. Press "ON / OFF" on the panel to restart it.

10
Fig. 12 Fig. 13
Remarks: If there is no operation for more than 10 minutes, the digital display will automatically
reduce the brightness. Touch any button again to restore the normal brightness.
V. When the machine is running, press the "ON / OFF" button on the panel (Fig. 14). After that, the whole
machine will enter the standby state and the display screen will be off.
Fig. 14
VI. When the oxygen concentrator is not in use, please turn off the "power switch” (The power switch is in
○state) (Fig. 15) and unplug the power from the socket.
Fig. 15

11
⚫Alarm
WARNING: When the oxygen concentration status indicator indicates an abnormal oxygen
concentration, please contact a dealer authorized by CARER.
I. Alarm classification:
The oxygen concentrator is designed with audible and visual alarm functions, which can alert you to
situations that require your attention.
1. There are two levels of alarms: high-level and medium-level.
High-level alarms indicate the most dangerous conditions for critically ill patients
and are the most serious warnings.
Medium-level alarms are serious warnings.
The alarm characteristics are shown in Table 1 below.
2. Priority level of alarms: high-level alarm> medium-level alarm, that is, when two levels of alarms
exist at the same time, the alarm signal is the sound of high-level alarm.
II. Audible alarm indication:
When an alarm is detected, the oxygen concentrator will make a “drip” alarm sound (The sound pressure
range is 60dB (A) ～ 120dB (A)). Different levels of audible alarms are of different sound frequencies.
1. High-level alarm: Pause after the "Drip-Drip-Drip ------ Drip-Drip” sound. It will sound 5 seconds
later.
2. Medium-level alarm: Pause after the "Drip-Drip-Drip” sound. It will sound 10 seconds later.
3. Priority level of alarms: high-level alarm> medium-level alarm, that is, when two levels of alarms
exist at the same time, the alarm signal is a high-level alarm indicator.
III. Visual alarm indication:
When an alarm event occurs, the alarm indicator will light up.
Table 1 Alarm characteristics
Alarm
classification
Indicator light
color
Flashing
frequency
Duty ratio
High-level alarm
Red
1.4Hz～2.8Hz
20%～60%
Medium-level
alarm
Yellow
0.4Hz～0.8Hz
20%～60%
Priority level of alarms: high-level alarm> medium-level alarm, that is, when two levels of alarms exist at
the same time, the alarm signal is a high-level alarm indicator.

12
IV. Measures to be taken when an alarm occurs:
1. Identify the status represented by the alarming signal
2. Exam the patient's condition
3. Identify the cause of the alarm
4. Take corresponding measures
V. Definition of alarm:
No.
Alarm
Level
Audible alarm
Visual
alarm
Alarm
status
Rem
ark
E1
The oxygen concentration is
lower than 73% five minutes
after the oxygen concentrator
is turned on.
High-
level
Pause after the "Drip-Drip-Drip ---
--- Drip-Drip” sound. It will sound
5 seconds later.
Red
light
Technical
alarm status
E2
The oxygen concentration is
higher than 73% but lower
than 82% five minutes after
the oxygen concentrator is
turned on.
Medium-
level
Pause after the "Drip-Drip-Drip ---
--- Drip-Drip” sound. It will sound
10 seconds later.
Yellow
light
Technical
alarm status
E3
The system pressure is
greater than 250 KPa.
Medium-
level
Pause after the "Drip-Drip-Drip ---
--- Drip-Drip” sound. It will sound
10 seconds later.
Yellow
light
Technical
alarm status
E4
The system pressure is lower
than 40 KPa.
Medium-
level
Pause after the "Drip-Drip-Drip ---
--- Drip-Drip” sound. It will sound
10 seconds later.
Yellow
light
Technical
alarm status
E5
Oxygen sensor and control
board communication failure
High-
level
Pause after the "Drip-Drip-Drip ---
--- Drip-Drip” sound. It will sound
5 seconds later.
Red
light
Technical
alarm status
E6
The oxygen flow rate is
lower than 0.5L/min during
oxygen generation
Medium-
level
Pause after the "Drip-Drip-Drip ---
--- Drip-Drip” sound. It will sound
10 seconds later.
Yellow
light
Technical
alarm status
When the machine is
running, the power is off
High-
level
Pause after the "Drip-Drip-Drip ---
--- Drip-Drip” sound. It will sound
5 seconds later.
Red
light
Technical
alarm status
WARNING: Please do not change the alarm preset of the oxygen concentrator; do not change
the memory contents of the oxygen concentrator MCU.
⚫Repairing and Maintenance of Oxygen Concentrator
WARNING: Please cut off the power of oxygen concentrator before cleaning.
I. Cleaning of oxygen humidification bottle
Please clean the humidification bottle every day.
Cleaning steps: Clean it with cold boiled water and then dry with a towel.
II. Catheters, masks and nasal tubes:
Catheters, masks, and nasal tubes are disposable. Please replace them regularly. The cleaning,
disinfection and sterilization methods are shown on the packaging or User’s Manual.

13
III. Air filter cotton:
Clean the air filter cotton once per every week. Clean following the steps below:
1. Remove the air filter cotton (Fig. 16)
2. Rinse thoroughly with cold boiled water and dry naturally. Filter cotton must be fully dried before
the next use.
Caution: To prevent damage to the oxygen concentrator, do not attempt to operate the oxygen
concentrator when there is no air filter or when the filter is dry.
IV. Air intake filter:
The air intake filter needs to be replaced every 1000 hours of operation. If the environment is harsh and
there are many hazes, it is recommended to shorten the replacement time appropriately. If you need to
replace the new air intake filter, please purchase from a dealer authorized by CARER. Please follow the
steps below:
1. Remove the used air intake filter (Fig. 16).
2. Install the new air intake filter and cover up the air filter cotton.
Fig. 16
Remarks: After the filter usage time expires, the filter indicator will be on. After replacing the filter,
press and hold the voice and nebulizing buttons for about 3 seconds simultaneously. The filter
indicator will be off, and the filter usage time is restored to 1000 hours.
V. Housing:
The housing is to be cleaned at least once a month. Please cut off the power before cleaning. Wipe with a
clean, soft, damp cotton cloth or sponge. Do not allow liquid to penetrate the gaps in the case.
WARNING: To avoid electric shock, do not open the housing. The housing can only be
opened by a service engineer authorized by CARER.
Air filter cotton
Air filter cotton cover
Air intake filter

14
VI. Accessories:
The accessories of the oxygen concentrator are as follows:
1. Humidification bottle
2. Mask and catheter (Mask and catheter are not included. It is recommended to use masks and
catheters with a medical device registration certificate).
3. Nasal oxygen tube (Nasal oxygen tube is not included. It is recommended to use a nasal oxygen
tube with a medical device registration certificate).
The oxygen concentrator is equipped with an oxygen output alarm device. When the oxygen concentrator
is turned on, the four indicators (power, normal, low concentration and maintenance) on the panel will
temporarily light up. After a few seconds, only the power indicator and normal indicator will continue to
work.
VII. Description of panel light is as follows:
1. Power indicator (green)-When it is on, it indicates that the equipment starts running;
2. Normal operation indicator (green)-When it is on, it indicates that the equipment is running normally;
3. Low concentration indicator (yellow)-When it is on, it indicates that the oxygen output concentration
of your equipment is low, or the oxygen system pressure is abnormal;
4. Service indicator (red)-When it is on, it indicates that your equipment needs maintenance. Please
contact a dealer authorized by CARER.
If the oxygen concentration is lower than the acceptable level, the green normal operation indicator will
turn off and the yellow abnormal indicator will turn on. At this time, please switch to your backup oxygen
source. Please refer to “Identifying and Removing Failures” on Page 13 of this Manual. If necessary,
please contact a dealer authorized by CARER.
Note: The oxygen generator does not need lubrication. Please do not apply any lubricant on
the product。
⚫Identifying and Removing Failures

15
The following "Checklist of Identifying and Removing Failures" will help you to conduct analysis. If the
suggested steps do not help troubleshooting, please switch to the backup oxygen source and contact a dealer
authorized by CARER.
Checklist of Identifying and Removing Failures
Failure performance
Possible cause
Troubleshooting
A. When the "power switch"
is turned on and the "ON /
OFF" button is pressed, the
oxygen concentrator does
not run, the power
indicator light is not on, the
alarm sounds and the
maintenance light flashes.
1. The power cord is
not plugged into a
power socket
properly.
Check the connection between the power cord and power
socket. The power system should be consistent with the
specification indicated on the nameplate.
2. The power socket is
not powered.
Check the circuit breaker at home and restart if necessary. If
the same problem reoccurs, use another socket.
If it still does not work after the above steps, please contact
your dealer.
3. The "overload
protector" of the
oxygen concentrator
is disconnected.
3. Press the "overload protector" of the oxygen concentrator.
The "overload protector" is next to the power cord. If the
same problem reoccurs, use another socket. If it still does
not work after the above steps, please contact your dealer.
B. When the switch is turned
on, the oxygen
concentrator will run, the
power indicator will be on,
the red maintenance
indicator will be on and the
alarm sound may be heard.
1. The air filter cotton
is blocked.
Check the air filter cotton. If it is dirty, clean it according to
the instructions on Page 13.
2. The exhausting
device is blocked.
Check the exhaust port and make sure that nothing is
blocked at the exhaust port of the oxygen concentrator.
3. The air intake filter
is blocked.
Check the air inlet filter. If it is dirty, replace it according to
the instructions on Page 13.
4. The nasal oxygen
tube or mask is
blocked.
Disconnect the nasal oxygen tube from the oxygen outlet. If
the flow increases, check whether the nasal oxygen tube is
blocked. Please replace the nasal oxygen tube or mask if
necessary.
C. When the switch is turned
on, the oxygen
concentrator will run, the
power indicator light will
be on and the low-
frequency vibration sounds
can be heard.
The solenoid valve
does not work
normally.
Immediately switch off the oxygen concentrator, switch to
the backup oxygen source, and contact your dealer.
If it still does not work after the above steps, please contact a dealer authorized by CARER.
If the fuse is damaged, please contact a professional technician to disassemble the case back cover and
replace the fuse.
Our company will provide the circuit diagram, component list, diagram notes, etc. to the qualified technical
personnel of the user as requested.
If the alarm system does not work, please contact an dealer authorized by CARER.

16
⚫Specifications and Parameters
I. Basic parameters
Model
Oxygen
produced
(L/min)
Oxygen
concentrati
on (V/V)
Nebulizing
rate
(ml/min)
Maximum
outlet
pressure
(kpa)
Nebulizi
ng
function
Input
power
(VA)
CR-P3W
3
93%±3%
≥0.15
20
Available
300
CR-P5W
5
93%±3%
≥0.15
20
Available
450
II. Under the nominal recommended flow, the oxygen concentration in the product gas is 93%±3% (V/V);
when a back pressure of 7kPa is applied, the maximum recommended flow rate should change within
±10%.
III. There is a pressure release device in the humidification bottle. The pressure release value is 20±2kpa.
IV. Normal operating conditions:
1. Ambient temperature: 5℃～40℃
2. Relative humidity: ≤80%
3. Air pressure range: 86 kPa～106 kPa
4. Power: AC220V/50Hz
V. Oxygen concentration: 93%±3%（V/V）
VI. The noise of medical oxygen concentrator should be ≤60dB (A) during normal operation.
VII. Alarm for abnormal oxygen concentration: The oxygen concentration is lower than 82% five minutes
after the oxygen concentrator is turned on, with an error of ±3%.
VIII. Alarm sound:> 60dB (A)
IX. Temperature rise of medical oxygen concentrator: Under normal working conditions, the maximum
temperature of the plastic housing is ≤60℃, and the gas temperature at the oxygen outlet of the oxygen
concentrator is ≤46℃.
X. Nebulizing characteristics: The working pressure should be within the range of 30 kPa ~ 180 kPa, the
gas flow should be ≥5L/min, the residual liquid volume should be ≤1mL, and the nebulizing rate
should be ≥ 0.15 mL/min.
⚫After-sales Services
I. Scope of warranty:
The following consumables: The air intake filter, air filter cotton, humidification bottle, accompanying
materials and other consumables are not covered by the warranty.
II. Non-warranty coverage:
1. Damage to the product caused by incorrect use;
2. Damage caused by unauthorized removal or modification of any part of this product;

17
3. Fail to use the product in accordance with the precautions in the Manual;
4. Damage to the product caused by abnormal voltage or accidents (such as fire, flood, etc.) caused by
any other force majeure factors;
5. No warranty certificate or altered warranty certificate;
6. The product has expired the warranty period.
III. Warranty time: The warranty period of the whole machine is one year from the purchasing date. The
service is to be charged if the damage is caused by failure of following the normal operation or
exceeding the warranty period. If any maintenance or repair is required, please contact the dealer of
the purchased product. Please present the warranty certificate when repairing. If a charge is required,
the service staff will explain the composition of the charge and carry out charged repair upon your
consent.
IV. In order to avoid accidental loss, please repair the oxygen concentrator at the dealer or service point
authorized by CARER.

18
⚫Environmental Protection
The disposal of wastes and residues shall comply with the relevant national laws and regulations.
⚫Graph of Oxygen Concentration Value and Fow Function
Graph of Oxygen Concentration Value and Fow Function when the nominal pressure at the outlet is
zero
Model: CR-P3W
Model: CR-P5W
91
91.6
93.6 93.9
91.6 92
93.8
94
90.2
90.8
92.9
93
88
93
98
0.0 1.0 2.0 3.0
Oxygen Concentration（%）
Oxygen Flow（LPM）
25℃
10℃
40℃
91
91.6
93.6 93.9
93 92.8
91.6 92
93.8
94
93.2
93
90.2
90.8
92.9
93
92.5 92.6
88
93
98
0.0 1.0 2.0 3.0 4.0 5.0
Oxygen Concentration（%）
Oxygen Flow（LPM）
25℃
10℃
40℃

19
⚫Change of Oxygen Concentration with Flow under Different Pressure
Conditions in the Altitude Range of 0-4000m
Model: CR-P3W
Model: CR-P5W
93 92.6 91.6
84
75
94 93 92
86
80
94.5 94 93
88
82
70
75
80
85
90
95
100
0 1000 2000 3000 4000
Oxygen Concentration（%）@25℃
Altitude（m）
3LPM
2LPM
1LPM
91
75
55
91.5
80
65
93 92.6 91.6
84
75
94 93 92
86
80
94.5 94 93
88
82
50
55
60
65
70
75
80
85
90
95
100
0 1000 2000 3000 4000
Oxygen Concentration（%）@25℃
Altitude（m）
5LPM
4LPM
3LPM
2LPM
1LPM