ResMed Mobi User Manual

User guide

English

Contents

Welcome ................................................................................. 1

Indications for use .............................................................. 1

Contraindications................................................................ 1

At a glance .............................................................................. 4

About your device .............................................................. 5

Control panel ...................................................................... 6

Display screen .................................................................... 7

Getting started ........................................................................ 8

Using the carrying case ...................................................... 8

Charging the internal battery .............................................. 8

Setting up your prescribed device setting .......................... 9

Power supply options ......................................................... 9

Battery life and recharge times ........................................ 11

Using a nasal cannula ....................................................... 12

Managing the cannula ...................................................... 13

Operating your device .......................................................... 14

Starting therapy ................................................................ 14

Turning on/off the device ................................................. 15

Verifying normal operation ............................................... 15

Understanding alarm indicators ........................................ 17

Caring for your device .......................................................... 18

Cleaning the fan vents...................................................... 18

Cleaning the device and carrying case .............................. 18

Storing the device ............................................................ 18

Inspecting the nasal cannula ............................................ 18

Extending the service life of the rechargeable batteries ... 18

Traveling with your device ................................................ 19

Troubleshooting ................................................................... 19

Alarms.............................................................................. 19

Rest mode ....................................................................... 20

Power .............................................................................. 21

Charging ........................................................................... 21

Battery ............................................................................. 22

Fan ................................................................................... 23

Triggering ......................................................................... 23

Technical specifications ....................................................... 23

Displayed values .............................................................. 25

Performance values ......................................................... 25

Internal battery values ...................................................... 26

Standard compliance ........................................................ 26

Symbols ................................................................................ 26

Servicing ............................................................................... 27

Technical support ................................................................. 27

Limited warranty .................................................................. 28

Guidance and manufacturer’s declaration

electromagnetic emissions and immunity ........................ 29

English 1

Welcome

The ResMed Mobi™ is a portable oxygen concentrator (POC).

WARNING

Read this entire guide before using the device.

CAUTION

In the US, Federal law restricts this device to sale by or on
the order of a physician.

Indications for use

The ResMed Mobi is used on a prescriptive basis by adult
patients who are diagnosed as requiring supplemental oxygen.
This oxygen concentrator will provide supplemental, high
concentration oxygen to these patients. It is not
life-supporting or life-sustaining.

It may be used continuously in a home, institution or travel
environment. The Mobi is also portable.

Contraindications

• The device is not intended to be life-sustaining or

life-supporting.

• In certain circumstances, oxygen therapy can be

hazardous. Seek medical advice before using this device.

• The device is designed to provide a flow of high-purity

oxygen at four different settings. The device should only
be used by patients prescribed oxygen therapy within this
range.

• Additional monitoring may be required for patients using

this device who are unable to hear, see or understand
audible/visual alarms or communicate discomfort.

GENERAL WARNINGS

• It is the responsibility of the patient or provider to

make back-up arrangements for an alternative oxygen
supply in case of power outage or mechanical failure.

• The device is to be operated in the approved carrying
case provided or other ResMed approved bag.

• Do not operate the device in any other enclosed bag as
improper ventilation will impair performance. Use only
the carrying case provided with the device or in a
ResMed approved bag.

• Do not open or modify the device. There are no user
serviceable parts inside. Repairs and maintenance
should only be performed by an authorized ResMed
service agent.

• Do not press the control panel buttons or screen with
any hard, sharp or small object as it may damage the
surface.

2

GENERAL WARNINGS (continued)

• The recommended nasal cannula maximum length to

be used with the Mobi is 7 ft (2 m). Be cautious when
using the nasal cannula or power cords as there is a
risk of strangulation if misused.

• Prolonged exposure to cannula may cause skin
irritation.

• Do not use power supplies or accessories other than
those provided with the device as the use of
non-specified accessories may impair performance.

• Use only spare parts recommended by ResMed to
ensure proper function and to avoid the risk of fire and
burns.

• For proper operation, the device requires unobstructed
ventilation. Always make sure any openings in the
carrying case provided or in a ResMed approved bag
are not obstructed by items which may prevent
ventilation. Do not place the device in a small closed
space (eg, closet).

• The device should be located as to avoid pollutants or
flames.

• The device should not be used adjacent to or stacked
with other equipment. If adjacent or stacked use is
necessary, the device should be observed to verify
normal operation in the configuration in which it will
be used.

• Portable and mobile RF communications equipment
can affect medical electrical equipment.

• When traveling by air, the device and external battery
must be transported as carry-on (not checked)
baggage.

• Do not operate the device at altitudes, temperatures
and humidity levels outside the specified operational
environment conditions. Extreme altitudes,
temperatures and humidity levels are expected to
adversely affect the flow rate and the percentage of
oxygen; and consequently the quality of the therapy.

• The device and external battery contain lithium-ion
batteries that are subject to special shipping
regulations. If shipping either the device or external
battery, notify the shipper that the shipment will
contain lithium-ion batteries.

• In the event of a battery’s cell leaking, do not allow the
liquid to come in contact with the skin or eyes. If
contact has been made, wash the affected area with
ample amounts of water and seek medical advice.

• Do not dismantle, open or shred secondary cells or
batteries.

• Do not expose cells or batteries to heat or fire and
avoid storing them in direct sunlight.

• Do not use alcohol, solvents, polishes or any oily
substances on the device, as they are flammable.

English 3

GENERAL WARNINGS (continued)

• Do not use oil, grease or petroleum-based products on

or near the device as the use of such products may
damage the electronic components of the device.

• Do not submerge or expose the device to liquids as it
may damage the electronic components of the device.

• Use only water-based lotions or salves before and
during oxygen therapy. Do not use petroleum or
oil-based lotions or salves to avoid the risk of fire and
burns.

• Do not lubricate fittings, connections, tubing or other
device accessories to avoid the risk of fire and burns.

• To avoid electric shock, unplug the device and remove
the external battery before cleaning the carrying case.
Do not put the device under any liquids.

• Always set the device to the patient's prescribed level
of oxygen flow. Do not increase or decrease the flow
rate from the prescribed level until a physician is
consulted.

• Open flames or smoking during oxygen therapy are
dangerous and may result in fire, facial burns, or
death. Do not allow smoking or open flames within 7 ft
(2 m) of the device or any oxygen carrying accessories,
such as an attached cannula.

• Oxygen makes it easier for a fire to start and spread.
Do not leave the nasal cannula on bed covers or chair
cushions if the device is turned on, but not in use; the
oxygen can make the materials flammable. Turn the
device off when not in use to prevent oxygen
enrichment.

• The settings of this device may not correspond with
continuous flow oxygen, or other models or brands of
oxygen concentrator.

• Use of equipment in environments with strong wind or
draughts may affect delivery of oxygen.

4

At a glance

The Mobi includes the following:

1

Device

2

Carrying case

3

Shoulder strap

4

AC power supply and cord

5

DC power supply

Contact your equipment provider for a range of accessories
available for use with the device including:

• External battery

• Standard single-lumen nasal cannula

• Mobi backpack

• Mounting straps.

English 5

About your device

1

Oxygen port

5

Fan inlet vent

2

Control panel

6

Fan outlet vent

3

Charger port

7

External battery port

4

Air filter cover

CAUTION

The use of accessories or service equipment not specified
for use with the device may impair its performance.

6

Control panel

1

Power

indicator

Displays a green LED when the device is

on and in use.

2

Power

button

• Illuminates the display screen when

pressed once.

• Turns the device on or off when pressed

and held.

3

Alarm

indicator

Displays a yellow LED and sounds an

audible signal (a tone or alarm) when a
change in operating status or a condition
occurs that requires response.

4

Mute button

Disables audible alarm signals during

operation. If an alarm has been muted, the
Mute symbol will appear on the Display
Screen.

5

Display

screen

Displays operational indicators.

6

Navigation

controls

Plus and minus buttons: Adjusts the device

setting (1, 2, 3 or 4).

Right and left arrow buttons: Illuminates
the screen when pressed once.

OK button:

• Illuminates the screen when pressed

once.

• Displays the device serial number and

run times when pressed and held.

CAUTION

Use the mute button appropriately as it mutes essential
audio signals regarding the status of the device.

English 7

Display screen

1

Message field

Displays the highest priority alarm.

2

External

power symbol

Displays when the device is connected

to an external power supply (AC or DC).

3

Device setting

level

Represents the selected device setting

(1, 2, 3 or 4).

4

PULSE-WAVE®

breath
detection
symbol

Displays when a breath is

detected and the device
delivers a bolus of oxygen.

5

Auto-dose

symbol

Displays when an automatic

bolus of oxygen is delivered.

6

User mode

Displays inhalation sensitivity modes:

Active or Rest. These settings
automatically adjust based on breathing
patterns.

7

INT and EXT

battery bars

Represent the charging level of the

internal (INT) and external (EXT) batteries.

Each battery bar is divided into

four segments representing
25% charge levels.

When the battery is almost

empty, an X may show on the
battery bar.

8

Operating

status field

Indicates if the device is Running,

Charging Internal or Charging External.

When the battery is fully charged,
Charging Internal or Charging External
will disappear from the display.

9

Mute symbol

Appears only when the mute function is

activated.

8

Getting started

The Mobi is to be operated and stored in its carrying case.
Before using the device for the first time, charge the battery
and set up your prescribed device setting.

If assistance is needed in setting up, using or maintaining
Mobi, contact your equipment provider.

Using the carrying case

The Mobi carrying case provides protection for the device.

1. Unzip the carrying case and insert the device with the
oxygen port and charger port facing the front pocket of the
carrying case.

2. Fully zip up the side of the carrying case.

Note: Verify that the air vents are not blocked as blockage
may cause the device to overheat during operation and power
off.

Charging the internal battery

1. Fully charge the internal battery by connecting the AC
power supply to the charger port on the device and a
power outlet.

It can take up to 4 hours to reach a full charge on the
internal battery.

2. Verify that the external power symbol, the Charging
Internal message and the INT battery bar appear on the
display screen.

This indicates that the device recognizes the external
power source and is charging the internal battery.

English 9

CAUTION

• If the device has been stored at the minimum or
maximum storage temperature, it may take up to 60
minutes at ambient temperature 68° F (20°C) before the
device will be ready for use.

• When power supply is connected, ensure that the
device is positioned so that it is not difficult to
disconnect the power supply.

Setting up your prescribed device setting

1. Press and hold the power button to turn the device on.
The display screen and power indicator will illuminate.

2. Use the plus or minus buttons to select the device setting
prescribed by your physician. This device setting will be
set and used when you start therapy.

3. Press and hold the power button to turn off the device.

Power supply options

AC power supply

The device can be powered and charged from a standard
100-240 VAC, 50-60 Hz power outlet.

• When the device is connected to an AC power supply, that

power supply powers the device and charges the internal
or external battery.

• The external power symbol will appear on the display

screen when the device is connected to an AC power
supply.

• Using an AC power supply that is not specified by ResMed

may damage the device and will void all warranties.

DC power supply

The device can be powered and charged from a vehicle’s (eg,
car, boat, motor home) standard 12 VDC power outlet.

• The vehicle battery will power the device and charge the

internal or external battery.

• The external power symbol will appear on the display

screen when the device is connected to a DC power
supply.

• The 12 VDC power outlets in some vehicles will not

provide sufficient current to operate the device and charge
the battery at the same time. Verify that a DC power outlet
can provide at least 10 amps at 12 VDC.

10

• Auxiliary power on vehicles varies significantly, so charge

times will vary.

• It is recommended that the vehicle be turned on before

plugging the DC power supply into the device.

Internal battery

A rechargeable internal battery is located within each device.

• When the device is being powered by the internal battery,

the display will read Running Internal and the INT battery
bar will appear.

• If the device is not connected to the AC or DC power

supply, the internal battery will slowly discharge over time
even when not in use.

• Always check the battery charge level prior to use to make

sure there is an adequate charge.

• It is recommended that the internal battery, even if only

partially used, be recharged as often as possible. The
internal battery cannot be overcharged, so the device can
be left plugged into an external power supply
continuously.

External battery

The external battery connects directly into the device’s
external battery port.

• When the external battery is connected and the device is

running, the display will read Running External and the
EXT battery bar will appear.

Charging the external battery

1. Place the external battery into the side pouch.

2. Connect the external battery to the external battery port.

3. Connect the device to a power outlet using either an AC or
DC power supply.

4. Verify that the external power symbol, the Charging
External message and the EXT battery bar appear on the
display screen.

English 11

CAUTION

• Do not use an external battery that is not authorized by
ResMed.

• Ensure that the device is not powered on when
connecting and disconnecting the external battery.

Notes:

• It can take up to 2 hours for an external battery to reach a

full charge. When the external battery is fully charged, the
Charging External message will disappear from the
display screen.

• By design, the external battery will power the device when

the external battery is connected to the device.

• Once the external battery is empty, the device will switch

to internal battery power. If both the internal and external
batteries are empty, it can take up to 6 hours to achieve a
full charge in both batteries.

• A new device or one taken from storage may not display

Charging Internal or Charging External when plugged
into the charger. If this operating status does not display,
reset the device to default factory settings. Refer to
Troubleshooting Alarms to perform an electronic reset
(see page 19).

• When Charging Internal or Charging External appears,

leave the charger on. Recharging an empty internal battery
can take up to 6 hours and less time for an external
battery.

Battery life and recharge times

The following table provides guidance when powering the
device with the battery:

Battery

type

Battery life Battery recharge

Device setting While in

use

While
not in

use

1 2 3 4

Internal
battery

8.6 hrs 6.0 hrs 3.8 hrs 3.2 hrs 6.1 hrs 3.6 hrs

External
battery

4.5 hrs 3.0 hrs 1.9 hrs 1.6 hrs 3.1 hrs 1.8 hrs

Note: Hours are approximate and based on a breath rate of 20 bpm. The
device will operate up to the battery life (hours) specified.

12

Using a nasal cannula

The oxygen port on the device rotates to reduce the risk of a
kinked cannula.

Attaching the cannula

1. Align the oxygen port to the upright position. The oxygen
port should be aligned at a 90° position.

2. Install the cannula adapter by rotating and pressing it onto
the fitting. Press down to fully seal the connection and
test the seal with a light pull.

Note: To ease cannula removal, the adapter should not be
advanced past the fourth rib of the fitting.

Removing the cannula

1. Place the fitting in the upright position and grasp the
cannula adapter as close to the fitting tip as possible.

2. Remove the cannula by rotating and pulling straight up on
the cannula adapter.

Note: Do not pull the cannula abruptly or at any direction
as it may break the fitting.

English 13

Managing the cannula

The carrying case strap can be used to wrap the cannula
tubing. This will prevent the cannula from being pinched or
kinked to avoid disruption of oxygen flow.

1. Fully unzip the strap.

2. Pass the adapter end of the cannula tubing through the
closed zipper end of the strap until the adapter is through.
Adjust the cannula tubing to a suitable position.

3. Hold the adapter in position and then zip up the strap.

4. Make sure the zipper is facing outwards then clip the strap
to the carrying case and attach the cannula to the device.

14

Operating your device

Make sure that the device is in a well-ventilated location. The
fan inlet and outlet vents must not be obstructed.

Check that the batteries are fully charged before running the
device.

Starting therapy

1. Attach the nasal cannula to the oxygen port.

2. Press and hold the power button to start therapy.

3. Confirm the prescribed device setting as established in
Setting up your prescribed device setting (see page 9).

4. Position the nasal cannula on your face and breathe

normally. Verify that the

symbol appears on the

display screen.

Notes:

• When the device detects inhalation, oxygen is supplied

through the cannula. The duration and size of the pulse is
dependent upon the device setting selected.

• Allow 3 minutes for the device to reach stated

performance. If used routinely, the last used device setting
will appear on the display screen after powering on.

• The device utilizes PULSE-WAVE which delivers oxygen

corresponding to your inhalation rate. This type of delivery
is very gentle so you may not feel the bolus of oxygen.

The

symbol will flash next to the device setting on

the display screen every time a breath is detected.

• After starting therapy, check for the symbol

appearing briefly on the screen when you breathe in. You
should also wait for approximately 5 minutes to make sure
no alarms turn on.

English 15

• The cannula may reach a contact temperature of 107.6°F

(42°C) when ambient conditions are at 104°F (40°C).
Therapy can continue; however, if you feel discomfort or
irritation from contact with the cannula, temporarily
remove the cannula or relocate to a cooler location.

WARNINGS

• Some respiratory efforts of the patient might not

trigger the device.

• Proper placement and positioning of the cannula is
critical to the consistent operation of this equipment.

• To ensure correct oxygen therapy is delivered, the
device must be used only after one or more settings
have been prescribed for you at your specific activity
level, and must only be used with the specific
combination of parts and accessories used to
determine these settings.

• The prescribed device setting may need to be
periodically reassessed for effectiveness.

Turning on/off the device

Press and hold the Power button until you hear an audible
tone.

Note: The audible tone confirms that the alarm system is
functioning and should be heard every time the device is
turned on or off.

Verifying normal operation

During normal operation, the control panel and display screen
should appear as described below:

Operation Description

Active or Rest Mode
activated

The user mode setting will appear next to the
selected device setting:

• Active Mode—breath rate is typical for an

active user.

•

Rest Mode—breath rate is slower than the

normal active breath rate.

Alarm muted The audible alarm signal will be muted and the

Mute symbol

will display on screen. The
yellow alarm LED will remain illuminated on the
Control panel and the alarm message will remain on
the display.

16

Operation Description

Breath detected

The

symbol will flash as you breathe. This
indicates that the device is delivering a bolus of
oxygen with each inhaled breath.

If you stop breathing through the nasal cannula

(mouth breathing), the

symbol will flash on
the display screen and the device will begin
delivering boluses of oxygen automatically. After 75
seconds, the device will activate a No Breath
Detected alarm and will continue to automatically
provide boluses of oxygen until normal breathing
resumes.

When the device detects normal breathing, the No
Breath Detected alarm will cease and the

symbol will display indicating detection of your
breath.

Charging status The following messages will appear on the display

screen depending on the battery charging status:

• Charging Internal—internal battery is

charging.

• Charging External— external battery is

charging.

• Running Internal—internal battery is in use.

• Running External—external battery is in use.

Note: By design, the device will preserve the
internal battery charge as long as possible. This
means that the external battery will be out of
charge before the internal battery and the internal
battery will charge before the external battery when
connected to power.

Power interruption The device will emit a two-second audible tone if

the AC or DC power is interrupted or intentionally
unplugged and the device will automatically switch
to battery operation.

Powered on The power indicator is illuminated green and the

display screen is on when the device is powered on.

Setting selected

1, 2, 3 or 4 will appear under Setting on the display
screen when a setting is selected.

English 17

Understanding alarm indicators

The device will activate an alarm to alert you to conditions
that may require your attention or action. All the alarms on the
device are classified as low priority.

Each alarm will trigger:

• a repeating audible tone

• an illuminated yellow Alarm indicator on the control panel

• an alarm message displayed in the Message field unless

noted differently below:

Alarm Description

Low battery This alarm is triggered when the internal battery

has approximately a 5% charge remaining.

Critical low battery When the internal battery has a <5% charge

remaining, a countdown timer of the final 180
seconds of battery life will appear on the display
screen and an X will appear over the INT battery
bar.

Low oxygen purity This alarm is triggered when the delivered oxygen

concentration is lower than specified.

No breath detected This alarm is triggered by a kinked cannula,

unattached cannula or shallow or mouth breathing.

High temperature This alarm is triggered when:

• the internal temperature of the device exceeds
149°F (65°C). The device will power off and the
audible alarm will cease. The yellow alarm
indicator and the alarm message will remain
until the device sufficiently cools.

• the temperature of the compressor exceeds
167°F (75°C). The device will continue running,
but the yellow alarm indicator and the alarm
message will remain until the device sufficiently

cools.

18

Caring for your device

The device was designed to minimize the amount of required
routine maintenance. There are no user repairable parts.
Aside from the preventative maintenance outlined below, all
other maintenance must be performed by qualified service
personnel.

All maintenance must be performed when the device is
powered off.

Cleaning the fan vents

Make sure that there is no build-up of lint, hair or other
materials that could obstruct the flow of air into the device’s
fan vents. At least once a month, inspect the grille of the
vents, and if it appears dirty, use a dry cotton swab to clean it.

Cleaning the device and carrying case

If it is necessary to clean the device or the carrying case, use
only warm water and a mild liquid dish detergent. Dampen a
cloth in the solution and carefully wipe the outside surfaces of
the device and the carrying case. Allow sufficient drying time
before placing the device back in the carrying case.

CAUTION

Do not use alcohol, solvents, polishes or any oily
substances as they may be flammable. Do not stick cotton
swab into vent while the device or fan is running as it may
cause damage.

Storing the device

Store the device in a cool, dry place where it will remain clean
and dry. This will help extend the device service life.

Inspecting the nasal cannula

Inspect the nasal cannula and make sure there are no kinks or
obstructions. Nasal cannula cannot be used between other
patients.

WARNING

Clean and replace the cannula and tubing as instructed by
the manufacturer and your equipment provider.

Extending the service life of the rechargeable
batteries

The device uses lithium-ion rechargeable batteries.

• Recharge the batteries as often as possible.

• Avoid leaving the device or external battery in a hot

environment, especially if exposed to direct sunlight.

• For long term storage of the external battery, it is

recommended that a charge of approximately 40% be
maintained on the battery.

English 19

Traveling with your device

The Mobi is approved by the Federal Aviation Administration
(FAA) for use on commercial aircraft. This approval is listed as
a part of the labeling on the bottom panel of the device. As
every airline has different requirements for traveling with
oxygen, review the airline’s requirements in addition to
following these instructions:

1. Two weeks before traveling, verify that the internal and
external battery, if purchased, will provide enough battery
life for the trip. Typically, airlines require having enough
battery life for one and a half times the duration of the
flight.

2. Fully charge the internal and external battery, if purchased,
within 24 hours before a trip. Keep the device connected
to a power supply until departure.

3. Pack all required accessories, including AC or DC power
supplies, the user guide and an extension cord.

4. Download and complete a physician’s statement from the
airline’s website. Have the signed and completed form
available for inspection if requested by the airline.

Troubleshooting

If you have any problems, have a look at the following
troubleshooting topics. If you are not able to fix the problem
or if persistent unexpected operation or events occur, contact
your equipment provider. Do not try to open the device.

Alarms

Problem/possible cause Solution

The device is beeping and the alarm LED is on.

The No breath detected
alarm has been activated.

Check the cannula to make sure it is open and
clear. Breathe through your nose and verify

that the

symbol displays on the
screen. If the alarm persists, turn the device
off and then turn it back on again to restart
the device.

The Low battery alarm has
been activated.

Approximately 15 minutes of power remain.
Connect the device to an AC or DC power
supply. Make sure all your charger
connections are secure and the Charging
Internal message and the external power
symbol appear on the display. The device will
begin charging and the alarm should stop. If
the alarm persists, switch to another source
of oxygen and contact your equipment
provider.

20

Problem/possible cause Solution

The Low oxygen purity
alarm has been activated.

The device is delivering an oxygen
concentration lower than specified. It is
recommended to reduce activity and if
problems persist, switch to a backup source
of oxygen and contact your equipment
provider.

The High temperature
alarm has been activated.

Move the device away from any potential
heat source and switch to another source of
oxygen. After allowing sufficient time to cool,
turn on the device. If the alarm resumes,
continue to use an alternate source of oxygen
and contact your equipment provider.

The display screen is blank.

Reset required alarm has
been activated. A sudden
spike in current from an
external source of power
may have triggered this
alarm.

Perform an electronic reset to reset the
device to default factory settings:

1. Verify that the device has at least 25% (1
bar) charge on the battery or plug it into
an external power source.

2. With the device powered off, press and
hold down the power button. The display
screen will start flashing. In 10 to 15
seconds, the device will beep one time
and the display screen will appear.

3. Release the power button. The device
will run for a few seconds and then turn
off.

If the alarm resumes, immediately after the
electronic reset, switch to another source of
oxygen and contact your equipment provider.

Rest mode

Problem/possible cause Solution

The device switches to Rest mode while in active use.

The device automatically
switches to Rest mode
based on the number of
breaths it detected during
the last minute.

The oxygen dispensed during Active and
Rest modes is exactly the same, so there is
no cause for concern. The mode changes
automatically to increase the sensitivity of
the device when you are sleeping or
breathing lightly. Close your mouth and
consciously breathe through your nose, and
the device should return to Active mode.

English 21

Power

Problem/possible cause Solution

The device will not turn on.

The battery is out of charge. Check the internal battery charge level. If it is

empty, plug the device into a charger.

Power is interrupted.

Loose power connections. If the power was not intentionally removed,

check all connections between the device and
the power source to make sure all are
secured and firmly plugged in. If the Power
indicator does not illuminate, switch to
another power source (AC or DC) or source of
oxygen and contact your equipment provider.

Charging

Problem/possible cause Solution

The battery does not charge when it is plugged into a vehicle or
power outlet.

Either the AC power outlet
is faulty or there is a loose
connection.

To determine whether the charger is working,
look for the external power symbol on the
display. If the symbol does not display, check
a green LED on the charger. If there is no
green LED on the charger, try another power
outlet and make sure the electrical cord from
the power outlet is pressed firmly into the
charger.

Either the DC power outlet
is faulty or there is a loose
connection.

If the battery will be charged in a vehicle, the
vehicle should be running before the device is
plugged in. To determine whether the charger
is faulty, look for the Charging Internal
message on the display screen. If the
message does not display, look for a green
LED on the charger. If there is no green LED
on the charger, unplug the charger and plug it
again.

A wrong charger may have
been used.

Read the label on the charger and make sure
it is an EDAC charger.

If Charging Internal is not
displayed on the screen, the
device must be reset.

Perform an electronic reset. Refer to
Troubleshooting alarms (see page 19).
Charging Internal should appear on the
display screen. An overnight charge may be
necessary.

22

Battery

Problem/possible cause Solution

The battery does not last as long as it used to.

The rechargeable batteries
may have degraded over
time.

Charge the battery overnight. Contact your
equipment provider if requiring battery
replacement.

The external battery is plugged in but the EXT bar does not display.

The external battery is likely
out of charge and could not
be detected by the device.

Turn off the device and plug it into a charger
while the external battery is connected. Press
and hold down the mute and OK buttons at
the same time. When the EXT battery bar
flashes on the display screen, release the
buttons.

The EXT battery bar has an X over it.

The external battery may be
out of charge.

Charge the external battery. If Charging
External is displayed on the display screen,
the external battery is charging and at less
than 3%. The X will disappear in this case. If
Charging External is not displayed, contact
your equipment provider.

The INT battery bar has an X over it.

The internal battery may be
almost empty. The X
appears at less than 3%
charge.

Charge the internal battery. Make sure
Charging Internal is displayed on screen.
The X will disappear in about an hour. If
Charging Internal does not display, perform
an electronic reset (see page 19). Charging
Internal should appear on the display screen
after the electronic reset. An overnight
charge may be necessary. If problem persists,
contact your equipment provider.

The EXT battery bar does not illuminate after the internal battery has
been fully charged.

External battery is not being
detected by the device.

Power off the device and connect it to the AC
or DC charger. Press and hold down the mute
and OK buttons. When the external battery
bar starts flashing, immediately release the
buttons. If connection is established, the EXT
battery bar and the Charging External
message will appear on the display screen.

Note: The warrantied use life of the battery is one year. Refer to the
Limited Warranty disclaimer. With proper care and maintenance, the battery
can last 500 recharge cycles and may last years. When the device is
charging with the rechargeable internal battery, there will be no changes or
interruptions in device operation (eg, the device operates and charges
simultaneously).

English 23

Fan

Problem/possible cause Solution

The fan is running when the device is turned off.

The fan keeps the device
cool when it is operating
and batteries cool when
they are charging.

When the device reaches full charge, the fan
will turn off.

Triggering

Problem/possible cause Solution

Triggering is inconsistent.

Breath is not being
detected.

The device is triggering
breaths although there is no
breathing into the cannula.

Power cycle the device by turning it off and
turning it on again. If problem persists,
contact your equipment provider.

Technical specifications

Power supply

AC input:

100-240VAC, 1.0-2.0A, 50-60 Hz; Output: 19VDC,

6.31A

DC input: 12VDC, 10A; Output: 19VDC, 6.3A

External battery:

14.8V, 4400mAh/65Wh

POC input: 19VDC, 6A

Environmental
conditions

Operating

temperature:

41°F to 104°F (5°C to 40°C)
Operating humidity:

15–93%, non-condensing

Operating

atmospheric
pressure:

700 hPa to 1013 hPa
Operating altitude:

Sea level to 10,000 ft (3,048 m)
Performance degradation may occur at high altitude.

Storage and

transport
temperature:

32°F to 140°F (0°C to 60°C)
Storage and
transport humidity:

15–93%, non-condensing

Electromagnetic

compatibility

This product complies with all applicable

electromagnetic compatibility requirements (EMC)
according to IEC 60601-1-2, for residential,

commercial and light industry environments.

24

IEC 60601-1

classification

Class II (double insulation, Type BF when connected

to AC/DC or DC/DC power supply.
Internally powered when not connected to the

AC/DC or DC/DC power supply.

Ingress protection

rating

Device: IP20 (Protected against access to hazardous

parts with a finger or solid foreign objects of

12.5 mm diameter and greater)
Device and carrying case: IP22 (Protected against

access to hazardous parts with a finger or solid
foreign objects of 12.5 mm diameter and greater,
and protected against vertically falling water drops
when tilted up to 15 degrees)

Carrying case: IP02 (Protected against vertically

falling water drops when tilted up to 15 degrees)

Physical

Weight:

5.5 lbs (2.49 kg)

Dimensions

(H x W x D):

7.95” x 9.60” x 4.49” (202 mm x 244 mm x 114 mm)

Housing
construction:

Flame-retardant engineering thermoplastic (unless
otherwise specified)

Air filter

Two-layered, powder-bonded, polyester non-woven
fiber

Nasal cannula

Recommended maximum length: 7 ft (2 m)

single-lumen cannula

Applied part

Patient interface (cannula)

Operator

The patient is the intended operator.

Mode of operation

Stationary/portable

Operator position

The device is designed to be operated within arm's

length. An operator should position their line of sight
within an angle of 30 degrees from a plane
perpendicular to the screen.

Principle of

operation

The ResMed Mobi is designed to provide low-flow
pulse oxygen therapy. Room air is drawn through an
electrically powered compressor and passed through
a molecular sieve. The molecular sieve removes
nitrogen from the air, thereby increasing the oxygen
content of the gas supplied by the device. Oxygen is
delivered to the patient through a nasal cannula.

English 25

Pneumatic flow

path

1. Air inlet

2. Compressor

3. Sieve beds (a, b)

4. Oxygen accumulation tank

5. Oxygen release valve

6. Oxygen sensor

7. Pressure sensor

8. Patient interface/cannula

Service life

With regular servicing, the expected service life of

the Mobi device is 5 years

Notes:

• The manufacturer reserves the right to change these specifications
without notice.

• The AC and DC power supplies are considered part of the Mobi
equipment.

• The device does not contain PVC, DEHP or phthalates.

Displayed values

Value

Range

Oxygen settings

Setting

1, 2, 3, 4

Performance values

Value

Range

Accuracy

Oxygen concentration

90%

–3/+6%

Deviation of delivered oxygen volume

per breath

±15%

Maximum deviation across
environmental conditions

±20%

Maximum outlet pressure

29 psi

Pneumatic inspiratory trigger

sensitivity

0.140 cm H2O (Active

mode), 0.101 cm H2O

(Rest mode)

Supported breath rates

10–30 bpm

Start-up time 5 mins

Sound pressure level at setting 2

38.2 dBA

Sound pressure level at setting 4

45.5 dBA

Sound power level at setting 4

53.5 dBA

Alarm sound pressure level 70 dBA

26

Internal battery values

Value

Range

Chemistry

Lithium-ion 14.4 VDC (nominal)

IATA classification

UN 3481 (Lithium-ion batteries
contained in equipment)

Note: After 300 full charge/discharge cycles, the operational battery time
may be reduced to 70% of its original operational time. Contact your
equipment provider if reduced battery life is affecting your mobility.

Standard compliance

The Mobi device is designed to conform to the following
safety standards:

• IEC 60601-1 and collateral standards

Symbols

The following symbols may appear on the product or
packaging.

Read instructions before use (symbol is blue on the device

label).

Indicates a warning or caution. Consult

instructions for use.

Manufacturer. European

Authorized Representative.

Batch code. Catalog

number.

Serial number. Device number.

Standby. Device weight. IP22 Protected against

access to hazardous parts with a finger or solid foreign

objects of 12.5 mm diameter and greater, and protected

against vertically falling water drops when tilted up to 15

degrees. IP20 Protected against access to hazardous parts

with a finger or solid foreign objects of 12.5 mm diameter and

greater. IP02 Protected against vertically falling water drops

when tilted up to 15 degrees.

Keep dry. Fragile,

handle with care.

European RoHS. Direct

current.

Type BF applied part. Class II equipment.

Humidity limitation. Temperature limitation.

Contains no China environmental hazardous substances.

10/20 years of China environmental protection use

period.

Prescription only (In the US, Federal law

restricts these devices to sale by or on the order of a

physician).

Canadian Standards Association.

Operating altitude. Atmospheric pressure limitation.

Complies with RTCA DO-160 section 21, category M.

Recyclable. Rechargeable battery. Gas flow.

English 27

Radio frequency. This side up. MR unsafe

(symbol’s prohibition sign is red on the device label).

No

open flame (symbol’s prohibition sign is red on the device

label).

No smoking (symbol’s prohibition sign is red on

the device label).

No oil or grease (symbol’s prohibition

sign is red on the device label).

Do not disassemble

(symbol’s prohibition sign is red on the device label).

Level VI power supply efficiency rating.

Servicing

The Mobi device is intended to provide safe and reliable
operation when operated in accordance with the instructions
provided by ResMed. ResMed recommends that the Mobi
device be inspected and serviced by an authorized ResMed
Service Center if there is any sign of wear or concern with
device function.

Technical support

Please contact your equipment provider or ResMed
representative for technical support.

28

Limited warranty

ResMed Ltd (hereafter ‘ResMed’) warrants that your ResMed
product will be free from defects in material and
workmanship from the date of purchase for the period
specified below.

Item Warranty period

• Portable oxygen concentrator (POC) 5 years

• Sieve bed

• Battery – internal and external/supplemental

• Accessories

1 year

This warranty is only available to the initial consumer. It is not
transferable.

If the product fails under conditions of normal use, ResMed
will repair or replace, at its option, the defective product or
any of its components.

This Limited Warranty does not cover: a) any damage caused
as a result of improper use, abuse, modification or alteration
of the product; b) repairs carried out by any service
organization that has not been expressly authorized by
ResMed to perform such repairs; and c) any damage or
contamination due to cigarette, pipe, cigar or other smoke.

Warranty is void on product sold, or resold, outside the region
of original purchase.

Warranty claims on defective product must be made by the
initial consumer at the point of purchase.

This warranty replaces all other expressed or implied
warranties, including any implied warranty of merchantability
or fitness for a particular purpose. Some regions or states do
not allow limitations on how long an implied warranty lasts, so
the above limitation may not apply to you.

ResMed will not be responsible for any incidental or
consequential damages claimed to have resulted from the
sale, installation or use of any ResMed product. Some regions
or states do not allow the exclusion or limitation of incidental
or consequential damages, so the above limitation may not
apply to you.

This warranty gives you specific legal rights, and you may also
have other rights which vary from region to region. For further
information on your warranty rights, contact your local
ResMed dealer or ResMed office.

English 29

Guidance and manufacturer’s
declaration electromagnetic emissions
and immunity

Medical electrical equipment needs special precautions
regarding EMC and needs to be installed and put into service
according to EMC information provided in this document.

The Mobi device has been designed to meet EMC standards.
However, should you suspect that the device performance
(eg, pressure or flow) is affected by other equipment, move
the device away from the possible cause of interference.

Guidance and manufacturer’s
declaration—electromagnetic emissions

The device is intended for use in the electromagnetic
environment specified below. The customer or the user of the
device should assure that the device is used in such an
environment.

Emissions test

Compliance

Electromagnetic

environment — guidance

RF emissions CISPR 11 Group 1 The device uses RF energy only

for its internal function.
Therefore, its RF emissions are
very low and are not likely to
cause any interference in
nearby electronic equipment.

RF emissions CISPR 11

Class B

The device is suitable for use

in all establishments, including
domestic establishments and
those directly connected to the
public low-voltage network
that supplies buildings used for

domestic purposes.

Harmonic Emissions
IEC 61000-3-2

Class A

Voltage
Fluctuations/Flicker
Emissions IEC 61000-3-3

Complies

Guidance and manufacturer’s declaration –
electromagnetic immunity

The device is intended for use in the electromagnetic
environment specified below. The customer or the user of the
device should assure that the device is used in such an
environment.

Immunity test

IEC60601-1-2

test level

Compliance

level

Electromagnetic

environment —

guidance

Electrostatic

discharge
(ESD)
IEC 61000-4-2

±6 kV contact

±8 kV air

±6 kV

contact
±8 kV air

Floors should be wood,

concrete or ceramic tile. If
floors are covered with
synthetic material, the
relative humidity should be
at least 30%.

30

Immunity test

IEC60601-1-2

test level

Compliance

level

Electromagnetic

environment —
guidance

Electrical fast

transient/burst
IEC 61000-4-4

±2 kV for

power supply
lines
±1 kV for
input/output

lines

±2 kV for

power
supply lines
Not
applicable

Mains power quality

should be that of a typical
commercial or hospital
environment.

Surge

IEC 61000-4-5

±1 kV

differential
mode
±2 kV
common

mode

±1 kV

differential
mode
±2 kV
common

mode

Mains power quality

should be that of a typical
commercial or hospital
environment.

Voltage dips,

short
interruptions
and voltage
variations on
power supply
input lines
IEC 61000-4-11

<5% Ut

(>95% dip in
Ut) for

0.5 cycle
40% Ut (60%

dip in Ut) for
5 cycles

70% Ut (30%
dip in Ut) for
25 cycles

<5% Ut
(>95% dip in
Ut) for 5 sec

<5% Ut

(>95% dip in
Ut) for

0.5 cycle
40% Ut

(60% dip in
Ut) for
5 cycles

70% Ut
(30% dip in
Ut) for
25 cycles

<5% Ut
(>95% dip in

Ut) for 5 sec

Mains power quality

should be that of a typical
commercial or hospital
environment.

If the user of the device
requires continued
operation during power
mains interruptions, it is
recommended that the
device be powered from an
uninterruptible power
source.

Power

frequency
(50/60 Hz)
magnetic field
IEC 61000-4-8

3 A/m

3 A/m

Power frequency magnetic

fields should be at levels
characteristic of a typical
location in a typical
commercial or hospital

environment.

Conducted RF

IEC 61000-4-6

3 Vrms

150 kHz to
80 MHz

3 V

Portable and mobile RF

communications equipment
should be used no closer to
any part of the device,
including cables, than the
recommended separation
distance calculated from
the equation applicable to
the frequency of the
transmitter.

English 31

Immunity test

IEC60601-1-2

test level

Compliance

level

Electromagnetic

environment —
guidance

Radiated RF

IEC 61000-4-3

3 V/m

80 MHz to

2.5 GHz

3 V/m

Recommended

separation distance

d = 1.17 √P
d = 1.17 √P 80 MHz to

800 MHz
d = 2.33 √P 800 MHz to

2.5 GHz
Where (P) is the maximum

output power rating of the
transmitter in watts (W)
according to the
transmitter manufacturer
and d is the recommended
separation distance in
meters (m). Field strengths
from fixed RF transmitters,
as determined by an
electromagnetic site
survey,

a

should be less
than the compliance level
in each frequency range.

b

Interference may occur in
the vicinity of equipment
marked with the following

symbol:

a

Field strengths from fixed transmitters, such as base stations for radio
(cellular/cordless) telephones and land mobile radios, amateur radio, AM
and FM radio broadcast and TV broadcast cannot be predicted theoretically
with accuracy. To assess the electromagnetic environment due to fixed RF
transmitters, an electromagnetic site survey should be considered. If the
measured field strength in the location in which the device is used exceeds
the applicable RF compliance level above, the device should be observed to
verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating the device.

b

Over the frequency range 150 kHz to 80 MHz, field strengths should be less
than 3 V/m.

Notes:

• Ut is the AC mains voltage prior to application of the test

level.

• At 80 MHz and 800 MHz, the higher frequency range

applies.

• These guidelines may not apply in all situations.

Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.

32

Recommended separation distances between
portable and mobile RF communications
equipment and the device

The device is intended for use in an environment in which
radiated RF disturbances are controlled. The customer or the
user of the device can help prevent electromagnetic
interference by maintaining a minimum distance between
portable and mobile RF communications equipment
(transmitters) and the device as recommended below,
according to the maximum output power of the
communications equipment.

Rated

maximum
output power
of transmitter
(W)

Separation distance according to frequency of

transmitter (m)

150 kHz to 80

MHz
d = 1.17 √P

80 MHz to 800

MHz
d = 1.17 √P

800 MHz to 2.5

GHz
d = 2.33 √P

0.01

0.12

0.12

0.23

0.1

0.37

0.37

0.74 1 1.2

1.2

2.3

10

3.7

3.7

7.4

100

12

12

23

For transmitters rated at a maximum output power not listed
above, the recommended separation distance d in metres (m)
can be determined using the equation applicable to the
frequency of the transmitter, where P is the maximum output
power rating of the transmitter in watts (W) according to the
transmitter manufacturer.

Notes:

• At 80 MHz and 800 MHz, the separation distance for the

higher frequency range applies.

• These guidelines may not apply in all situations.

Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.

ResMed.com

ResMed Asia Pte. Ltd.

8 Loyang Crescent, #05-01 Singapore 509016

Mobi is a trademark and/or registered trademark of the ResMed family of companies. For patent
and other intellectual property information, see ResMed.com/ip. EDAC is a trademark of EDAC
Power Electronics Co., Ltd. © 2018 ResMed Ltd. 358016/1 2018-06