Lowenstein Medical LM 2000 User manual

Respiratory humidifier
User manual
Rev. 09382-03
06.05.2021

Copyright ® 2021 Löwenstein Medical SE & Co. KG
Subject to change
06.05.2021
Löwenstein Medical SE & Co. KG
Arzbacher Straße 80
56130 Bad Ems, Germany
:
+49 2603/9600−0
:
+49 2603/9600−50
:
loewensteinmedical.com
User manual LM 2000
Order no.: gba10450en2012
Chapt er

Supplementary instructions
About this instruction manual
This instruction manual was created for the respiratory
humidifier LM 2000. Hereinafter the product is also
referred to as “device”.
This instruction manual allows you to use the device
safely and efficiently. The instruction manual is a
component of the device and must be kept in close
proximity to the device and be accessible to staff at all
times.
Persons using the device must have carefully read and
understood this instruction manual before commencing
any work. The observance of all safety notes and
instructions contained in this manual is a basic
requirement for safe working.
Moreover, special provisions for using medical equipment
at the location apply.
The illustrations in this manual are intended for the basic
understanding and may differ from the actual design.
Customer service
Please contact our customer service with the following
contact details:
Contact type Contact details
Postal address Löwenstein Medical SE & Co. KG
Arzbacher Straße 80
56130 Bad Ems, Germany
[phone]
[phone]
loewensteinmedical.com
Further information If you have any questions or remarks regarding this
instruction manual or the device, please contact your
authorised regional specialist vendor or the manufacturer
directly.
Copyright
This instruction manual is protected by copyright law.
Passing this manual on to third parties, duplication of any
kind – even in form of excerpts – as well as the use and/or
disclosure of the contents without the written consent of
the manufacturer is not permitted, except for internal
purposes.
Violation obligates compensation for damages. The right
to further claims remains reserved.

Table of Contents
4 09382-03 - 06.05.2021 - LM 2000
Table of Contents
1. List of abbreviations............................................................................................................... 6
2. Safety ....................................................................................................................................... 7
Symbol definition....................................................................................................................... 7
Warnings ............................................................................................................................... 7
Other symbols in this instruction manual .............................................................................. 7
Medical purpose........................................................................................................................ 8
Indication ............................................................................................................................... 8
Residual hazards ...................................................................................................................... 8
Electromagnetic emissions and electromagnetic compatibility............................................... 12
Guidelines and manufacturer's declaration – Electromagnetic emissions.......................... 12
Guidelines and manufacturer's declaration – Electromagnetic immunity ........................... 13
Personnel qualifications .......................................................................................................... 16
Liability and guarantee............................................................................................................ 16
3. Device overview .................................................................................................................... 17
Scope of delivery..................................................................................................................... 17
Device description................................................................................................................... 17
Level sensor............................................................................................................................ 18
Icons........................................................................................................................................ 19
Identification and labelling....................................................................................................... 21
4. Configuration Service........................................................................................................... 22
Cable....................................................................................................................................... 22
Neonate configuration............................................................................................................. 23
Adult configuration .................................................................................................................. 24
5. Start-up .................................................................................................................................. 25
6. Operation ............................................................................................................................... 27
Neonate configuration............................................................................................................. 27
N – Operating screen .......................................................................................................... 27
N – Temperature control screen.......................................................................................... 29
N – List of events................................................................................................................. 30
N – Settings menu............................................................................................................... 31
N – Screen saver................................................................................................................. 33
N – Alarm screen................................................................................................................. 33
Adult configuration .................................................................................................................. 35
A – Operating screen .......................................................................................................... 35
A – Temperature control screen.......................................................................................... 36
A – Settings menu ............................................................................................................... 39
A – Screen saver ................................................................................................................. 41
A – Alarm screen ................................................................................................................. 41
7. Alarms .................................................................................................................................... 43
Alarm hierarchy ....................................................................................................................... 43
First-level alarms..................................................................................................................... 44
Second-level alarms................................................................................................................ 46
Testing the functionality of the alarm system.......................................................................... 48

Table of Contents
LM 2000 - 06.05.2021 - 09382-03 5
8. Maintenance .......................................................................................................................... 49
Technical safety controls ........................................................................................................ 49
Daily testing ......................................................................................................................... 49
Annual testing...................................................................................................................... 49
Repairs.................................................................................................................................... 50
Cleaning, disinfection and / or sterilisation ............................................................................. 50
Cleaning and disinfecting the humidifier ............................................................................. 50
Cleaning and disinfecting the heating cable and power cable ............................................ 51
Cleaning and sterilising the heating cable and power cable ............................................... 52
Cleaning and disinfecting the temperature sensor cable .................................................... 52
Cleaning and sterilising the temperature sensor cable ....................................................... 53
9. Disposal ................................................................................................................................. 53
10. Accessories and replacement parts ................................................................................... 54
11. Technical data ....................................................................................................................... 56
Chapt er

Chapter
1
List of abbreviations
Symbol definition
6 09382-03 - 06.05.2021 - LM 2000
1. List of abbreviations
Table 1: Abbreviations and Terms
Abbreviation, Term Description
Control temperature The temperature at which the humidifier attempts to maintain the
measured gas temperature.
Heated or unheated tube Non-rigid ventilation tube with or without internal heating element,
used to transport gases and/or vapours between the components of a
ventilation system.
Heating cable Cable that supplies power to the internal heating cables of the heated
ventilation tube.
Heating plate LM 2000 element for supplying the water chamber with thermal
energy.
Mains cable Cable connecting the humidifier with a power source.
Stand-by The device’s operating mode at reduced performance
Temperature sensor Sensor for measuring temperature.
Temperature sensor
cable Cable on which two temperature sensors are installed to monitor the temperature at the outlet of the water chamber and near the patient.
Ventilation system All ventilation tubes, connectors and components which form the
exhalation and inhalation tubes of the gas path between the ventilator
and the patient.
Water chamber Component of the humidifier in which evaporation or nebulisation
takes place.

Chapter
2
Safety
Symbol definition
LM 2000 - 06.05.2021 - 09382-03 7
2. Safety
Symbol definition
Warnings
CAUTION indicates a latent hazard that does not represent a direct threat
but can lead to physical injury if not avoided.
CAUTION
WARNING indicates a hazard that represents a direct threat and can lead
to severe injury or death if not avoided.
WARNING
Other symbols in this instruction manual
To indicate instructions for action, result descriptions,
lists, references and other items the following symbols
and highlighting are used in this instruction manual:
1. Indicates step-by-step instructions for action.
(1) Indicates positions within illustrations.
▪Indicates lists without a defined order.
– Indicates list entries without a defined order.
(see reference target on page) indicates references to
chapters or specific contents in this manual.
This symbol highlights hints and recommendations
as well as information for efficient and failure-free
operation.

Chapter
2
Safety
Medical purpose
8 09382-03 - 06.05.2021 - LM 2000
Medical purpose
Indication
The LM 2000 is a humidifier that adds water in the
form of steam to the inspiratory gas of newborn,
paediatric and adult patients.
The LM 2000 is a Category 1 humidifier, i.e. it is
intended for use in patients with diverted (invasive
ventilation) and non-diverted (non-invasive
ventilation) airways. The LM 2000 is intended for use
in hospital or healthcare facilities as well as at home.
Residual hazards
Patient transport Do not use the humidifier when transporting patients,
as water can escape from the chamber into the
ventilation tube. Undulating and jerky movements, as
well as the ventilator’s airflow, can cause this water
to enter the patient's airways.
Temperature Clinical operators or medical staff decide on the
temperature to be set on the humidifier on their own
responsibility.
Formation of condensation Correctly set regulation temperatures of the
humidifier/heated hose reduce the formation of
condensate. Check several times daily that no
condensation forms inside the ventilation system.
The formation of condensate can cause an increased
in flow resistance, influence the measurement of
ventilation parameters and trigger an alarm from the
ventilator. Excessive humidification can increase the
viscosity of secretions and lead to the formation of
condensation droplets that can enter the patient’s
respiratory tract, causing infections. Excess
condensation can enter the patient’s respiratory tract
and cause injuries. Always remove excess water
from the system and inspiration line.
Position Using a special mounting accessory, position the
humidifier horizontally on a solid surface or on a
stand, ensuring that the humidifier is at a lower level
than the patient and is not tilted.
Accessories The LM 2000 may only be used with ventilation tubes
and accessories from Löwenstein Medical, which
have been specially developed for the correct
operation of the device. The use of ventilation tubes
and accessories not approved by Löwenstein
Medical may impair performance or safety.
Ensure that the ventilator is compatible with the
tubes used.

Chapter
2
Safety
Residual hazards
LM 2000 - 06.05.2021 - 09382-03 9
Medication Do not use the LM 2000 to administer medication.
Ambient conditions Löwenstein Medical does not guarantee correct
operation if the humidifier is installed and/or used
under ambient conditions other than those specified.
Ambient or inlet gas conditions at the limit of the
recommended temperature range may limit
performance.
▪The LM 2000 must not be used in oxygen-
saturated environments or with high
concentrations of this gas (e.g. in hyperbaric
chambers).
▪Do not use the humidifier near flammable gases.
▪Using the device at altitudes above 6,000 feet
(2,000 meters) may affect its performance.
Electromagnetic compatibility The LM 2000 meets the electromagnetic
compatibility requirements according to
EN 60601-1-2:2015. The device has not been tested
or certified for use near X-ray, CT or MRI equipment.
Keep the humidifier away from such equipment to
prevent impaired performance.
The LM 2000 must not be placed and used in
environments intended for magnetic resonance
imaging, and never in environments with high
electromagnetic fields.
The operation of high-frequency, short-wave or
microwave surgical equipment in the vicinity of the
humidifier may affect its operation. In this case, the
humidifier near such devices must be removed.
Transport and storage temperature Löwenstein Medical does not guarantee the correct
operation of the LM 2000 if transported and stored
outside the recommended temperature range of
+10 °C to +50 °C.
Installation ▪Initial installation must be performed by
authorised/certified personnel.
▪During installation, carry out a visual inspection to
check that the humidifier, the temperature sensor
cable and the heating cable are undamaged.
Do not cover or place in an
unfavourable position
▪For correct and safe operation of the humidifier,
ensure that the ventilation slots on the underside
and rear of the humidifier are free of blockages.
Do not cover the LM 2000 with bed linen or other
cloth during operation to prevent the humidifier
from overheating.
▪Install the humidifier in a location protected from
draughts.
▪Ensure that the humidifier is always at a lower
level than the patient to prevent any
condensation water from running off to the
patient.
▪Place the humidifier on a firm, stable, horizontal
surface to avoid spilling liquid from the water
chamber.

Chapter
2
Safety
Residual hazards
10 09382-03 - 06.05.2021 - LM 2000
Temperature sensor ▪The humidifier can only be operated with the
temperature sensor cable correctly plugged in.
This humidifier does not permit humidifying
processes without using the sensors on the
temperature sensor cable.
▪Perform a visual inspection to check the
mechanical integrity of the sensors. Damaged
sensors can lead to humidifier malfunction.
▪Check that the temperature sensors are fully
inserted into the corresponding sockets on the
ventilation tubes so that the tip of the sensors is
in the middle of the tube. Incomplete insertion or
accidental disconnection of at least one of the
two temperature sensors during use could affect
the correct operation of the humidifier and/or
trigger repeated alarms.
▪Position the temperature sensor near the patient
on the outside of the incubator or outside the
effective range of the radiation plate. Positioning
this sensor inside the incubator or within the
effective range of the radiation plate will affect the
correct operation of the humidifier.
Connections and cables ▪Make sure that the power source characteristics
are compatible with the label of the humidifier.
▪Pay attention to the positioning of the cables and
ventilation tubes. If they are placed around the
patient's head, they can cause strangulation.
▪Always disconnect the plugs of the temperature
sensor cable and the heating cable by pulling on
the plug and not on the cable so as not to
damage them.
▪The plugs of the heating and temperature sensor
cables are provided with guide arrows, such as
the corresponding sockets on the side of the
humidifier in order to insert them correctly.
Unaligned, forced insertion can cause the
sockets to break.
▪The temperature sensor and heating cables must
not be forcefully inserted in any way.
Start-up ▪Do not switch on the humidifier before you start
ventilation.
▪When switched on, the humidifier automatically
recognises the electrical configuration of the
ventilation tubes with which it is equipped (heated
inspiration and expiration tubes or heated
inspiration tubes only).
Behaviour in the event of faults ▪If liquid is spilt, do not touch the humidifier with
your hands, but immediately disconnect the
mains voltage via a main switch (if present) or by
pulling out the mains plug (only after you have
ensured that the liquid has not entered the
humidifier).

Chapter
2
Safety
Residual hazards
LM 2000 - 06.05.2021 - 09382-03 11
Operation ▪For inhalation, only use USP-grade sterile water
or an equivalent product.
▪Disconnecting the expiration tube’s heating cable
plug during a procedure started with both heated
tubes can lead to condensation in this expiration
tube.
▪Do not touch the heating plate or the base of the
chamber. Exposed surfaces of the metal may be
hot and cause burns on contact.
▪Always maintain a gas flow of at least one litre
per minute in the respiratory system to prevent
overheating. If ventilation is interrupted, the
humidifier must be switched off.
▪When air-oxygen mixtures are introduced into the
heated tubes and humidification chamber
installed in combination with the LM 2000, the
concentration of the mixture must be measured
near the patient interface.
Cleaning and maintenance ▪Before cleaning and disinfecting, it is imperative
that you shut down the device and disconnect it
from the mains.
(→ "Cleaning, disinfection and / or sterilisation"
p. 50)
▪The device may only be repaired and serviced by
authorised personnel. Only components
expressly approved by Löwenstein Medical for
use with the device may be used.
Disposal ▪After decommissioning, the device must be
disposed of properly in accordance with EU
Directive 2012/19/EU. Contact the responsible
Löwenstein Medical sales partner.

Chapter
2
Safety
Electromagnetic emissions and electromagnetic compatibility
12 09382-03 - 06.05.2021 - LM 2000
Electromagnetic emissions and electromagnetic
compatibility
Guidelines and manufacturer's declaration –
Electromagnetic emissions
The LM 2000 system is suitable for operation in the
electromagnetic environment specified below.
Customers or users of the LM 2000 system must
ensure its use in such a suitable environment.
Table 2: Guidelines and manufacturer's declaration – Electromagnetic emissions
Interference emissions test Conformity Guidelines on the electromagnetic
environment
High-frequency interference
emission test CISPR11
Group 1 The LM 2000 system uses high-frequency
energy only for internal functions. It therefore
emits very little high-frequency interference
and is unlikely to interfere with nearby
electronic equipment.
High-frequency interference
emission test CISPR11
Class B The LM 2000 system is suitable for use in all
facilities, including private households and in
facilities directly connected to the public low-
voltage network for supplying private
households.
Harmonic waves
IEC 61000−3−2
Class A
Voltage variations/flickers
IEC 61000−3−3
full
conformity

Chapter
2
Safety
Electromagnetic emissions and electromagnetic compatibility
LM 2000 - 06.05.2021 - 09382-03 13
Guidelines and manufacturer's declaration –
Electromagnetic immunity
The LM 2000 system is suitable for operation in the
electromagnetic environment specified below.
Customers or users of the LM 2000 system must
ensure its use in such a suitable environment.
Table 3: Guidelines and manufacturer's declaration – Electromagnetic immunity
Immunity test IEC 60601-test
level
Compliance
level
Electromagnetic environment -
Guidance
Discharge of
static electricity
in accordance
with
EIEC 61000-4-2
± 6 kV contact
discharge
± 8 kV air
discharge
± 6 kV contact
discharge
± 8 kV air
discharge
Floors should consist of wood or
concrete or be covered in ceramic tiles.
If the floor is covered with synthetic
material, the relative air humidity must
amount to at least 30%.
Quick transient
electrical
interference /
bursts in
accordance with
IEC 61000-4-4
± 2 kV for mains
± 1 kV for inlet
and outlet lines
± 2 kV for mains
(No signal lines
available)
The quality of the supply voltage should
correspond to that of a typical business
or hospital environment.
Surges in
accordance with
IEC 61000-4-5
± 1 kV push-pull
voltage
± 2 kV
asymmetric
disturbance
± 1 kV push-pull
voltage
± 2 kV
asymmetric
disturbance
The quality of the supply voltage should
correspond to that of a typical business
or hospital environment.
Voltage dips,
short
interruptions and
voltage
variations in the
supply voltage in
accordance with
IEC 61000-4-11
< 5% UTfor
½ period
(> 95% dip)
40% UTfor
5 periods
(60% dip)
70% UTfor
25 periods
(30% dip)
< 5% UTfor 5 s
(> 95% dip)
< 5% UTfor
½ period
(> 95% dip)
40% UTfor
5 periods
(60% dip)
70% UTfor
25 periods
(30% dip)
< 5% UTfor 5 s
(> 95% dip)
The quality of the supply voltage should
correspond to that of a typical business
or hospital environment.
If the device is to be operated
independently of the main power supply,
we recommend that the LM 2000 system
be powered by an uninterruptible power
supply (UPS) or battery.
Magnetic field at
supply frequency
(50/60 Hz) in
accordance with
IEC 61000-4-8
3 A/m 3 A/m
Magnetic fields in the mains frequency
must correspond to the typical values as
found in a business or hospital
environment.

Chapter
2
Safety
Electromagnetic emissions and electromagnetic compatibility
14 09382-03 - 06.05.2021 - LM 2000
Electromagnetic environment – Guidelines
The LM 2000 system is suitable for operation in the
electromagnetic environment specified below.
Customers or users of the LM 2000 system must
ensure its use in such a suitable environment.
Table 4: Guidelines and manufacturer's declaration – Electromagnetic immunity
Immunity test IEC 60601-test
level
Compliance
level
Electromagnetic environment -
Guidance
Conducted
HF-interference
in accordance
with
IEC 61000-4-6
3 Veff
150 kHz −
80 MHz
3 Veff When using portable and mobile HF-
communications equipment, all parts of
the LM 2000 system (including cables)
must be kept at least at the
recommended distance calculated using
the equation for the transmitter
frequency.
Recommended protective distances:
d = 1.2 √P
d = 1.2 √P, 80 MHz to 800 MHz
d = 2.3 √P, 800 MHz to 2.5 GHz
Radiated
HF-interference
in accordance
with
IEC 61000-4-3
3 V/m
80 MHz −
2.5 GHz
3 V/m
P = rated power of the transmitter in watts [W] in accordance with the instructions of the
transmitter manufacturer.
d = recommended protective distance in metres [m].
At all frequencies, the field strength of stationary radio transmitters should be lower than the
compliance level in accordance with an on-site* examination**.
Interference is possible in the environment of devices that bear the adjacent icon.
NOTE 1: At 80 MHz and 800 MHz, the higher frequency range applies
NOTE 2: These guidelines may not be applicable in all cases. The distribution of
electromagnetic variables is influenced by absorption and reflections from buildings,
objects and human beings.
*
The field strengths of stationary transmitters, such as the basic stations of radio telephones
and mobile landline devices, amateur radio stations, AM and FM radio broadcasting and
television transmitters can theoretically not be accurately predetermined. To determine the
electromagnetic environment with regard to stationary transmitters, a study of the site
should be considered. If the measured field strength at the location where LM 2000 system
is used exceeds the above compliance level, the LM 2000 system should be observed in
order to prove its proper function. If unusual performance characteristics are observed,
additional measures may be necessary, e.g. modification or relocation of the LM 2000
system.
**
Over a frequency range of 150 kHz to 80 MHz, the field strengths must be lower than 3V/m

Chapter
2
Safety
Electromagnetic emissions and electromagnetic compatibility
LM 2000 - 06.05.2021 - 09382-03 15
Recommended safety distances between portable, mobile and fixed HF
telecommunication equipment and the LM 2000
The LM 2000 system is is intended for operation in an
electromagnetic environment in which radiated HF
interference is controlled. The customer or user of the
LM 2000 system can help to prevent electromagnetic
interference by observing the minimum distances
between portable and mobile HF communications
equipment (transmitters) and the LM 2000 system, as
recommended below in accordance with the
maximum output performance of the communications
equipment.
Table 5: Protective distance depending on the transmitter frequency
Rated power of
the transmitter
[W]
Protective distance depending on the transmitter frequency [m]
150 kHz − 80 MHz 80 MHz − 800 MHz 800 MHz − 2.5 GHz
d = 1.2 √P d = 1.2 √P d = 2.3 √P
0.01 0.02 0.03 0.06
0.1 0.06 0.09 0.19
1 0.18 0.3 0.6
10 0.57 0.5 1.9
100 1.8 3.0 6.0
For transmitters whose power rating in the above table is not given, the distance can be
determined in metres using the equivalence, which belongs to each column, whereby P is the
power rating in watts [W] in accordance with the instructions of the transmitter manufacturer.
NOTE 1: At 80 MHz and 800 MHz, the higher value applies.
NOTE 2: These guidelines may not be applicable in every situation. The distribution of
electromagnetic waves is influenced by absorption and reflections from buildings,
objects and human beings.

Chapter
2
Safety
Personnel qualifications
16 09382-03 - 06.05.2021 - LM 2000
Personnel qualifications
Users This manual is intended for the following operators:
senior clinical operators or healthcare professionals
and non-professional operators. Before using the
humidifier, the operating personnel must be trained
accordingly and have read and understood the
contents of the entire manual.
The device may only be operated by persons who,
due to their training or their knowledge and practical
experience, can guarantee proper handling and who
are aware of the risks and advantages of the device
used.
Medical personnel This device should only be used by senior clinical
operators or healthcare professionals and laypersons
under the supervision of qualified medical personnel
who have received appropriate training and have
read and understood the contents of this manual.
Training It must be ensured that all hazards, warnings and
precautions listed in the manual have been
adequately addressed during training. Laypersons
should be instructed to contact the technical
customer service in the event of any changes in
humidifier performance.
Password The responsible and authorised/certified personnel,
who have an appropriate password, can use to select
the ‘neonate configuration” or the “adult
configuration”.
Liability and guarantee
Löwenstein Medical accepts no liability for defects or
malfunctions resulting from:
▪Disregard of instructions in the operating manual
▪Breakage of the device or part thereof caused by
falls, impact or tampering
▪Use of non-original accessories
▪Unsuitable operating environment
▪Damage caused by accidents or mishaps
If the device is serviced by persons who are not part
of the Löwenstein Medical SE & Co KG maintenance
and repair service, liability for the device function is
always transferred to the owner or operator of the
device. This also applies if the device is not used as
intended.
Löwenstein Medical SE & Co KG accepts no liability
for damage resulting from failure to observe these
instructions. Guarantee and liability provisions of the
sale and delivery conditions are supplemented by the
above-mentioned instructions.

Chapter
3
Device overview
Scope of delivery
LM 2000 - 06.05.2021 - 09382-03 17
3. Device overview
Scope of delivery
The LM 2000 humidifier is supplied in ready-to-use
sets with operating and quick reference guide.
A complete list of sales codes can be found in
(→ "Accessories and replacement parts" p. 54).
Device description
The LM 2000 humidifies and warms the breathing
gas mixture administered to the patient by
transferring heat to the sterile water in the water
chamber. The water chamber is inserted onto the
heating plate of the humidifier; the water in the water
chamber is heated by the heating plate.
The LM 2000 can be used in both invasive and non-
invasive ventilation thanks to the possibility of
regulating the temperature of the inhaled gases.
The LM 2000 humidifier automatically controls the
temperature and humidity of the gas by means of two
temperature sensors located at the outlet of the
water chamber and close to the patient. This ensures
correct and safe gas administration to the patient.
The LM 2000 provides an automatic safety
mechanism that intervenes in the event of absence,
interruption or sudden change in gas flow by carefully
controlling the power supplied to the hot plate and
heated ventilation tube, therefore preventing
potentially dangerous overheating situations.
The humidifier is also equipped with an automatic
control system that prevents the formation of
condensation in the airways in any operating
situation.

Chapter
3
Device overview
Level sensor
18 09382-03 - 06.05.2021 - LM 2000
Components of the LM 2000 humidifier
(1) Symbol for hooking/unhooking the water
chamber
(2) LED light
(3) Heating plate
(4) Ventilation slots
(5) Touchscreen display
(6) Heating cable socket (red)
(7) Temperature sensor cable socket (blue)
(8) Water level sensor
Operating parameters
The control temperature range at the outlet of the
water chamber can be set to between 29°C and
37°C. The control temperature interval at the sensor
near the patient can be set to between 30°C and
40°C. The difference between the control
temperature at the sensor near the patient and at the
output of the water chamber is between +1°C and
+4°C.
The graphic representations of the humidifier are
indicative and only serve to facilitate its possible
installation. The choice of ventilation system is the
sole responsibility of the doctor who initiates the
therapy.
The usage of unauthorised accessories will result in damage to health
and property!
The usage of unauthorised accessories may lead to damage to the health
of the patient and the device.
▪Use authorised accessories only.
WARNING
Level sensor
The humidifier is equipped with an optical detection
system for the maximum and minimum water level in
the water chamber. This system triggers a first level
alarm if the maximum level is exceeded or a second
level alarm if the water level in the water chamber is
insufficient.
You can activate the optical sensor to detect the
minimum water level from the settings menu.

Chapter
3
Device overview
Icons
LM 2000 - 06.05.2021 - 09382-03 19
Patient hazard - Insufficient oxygen supply due to water in the
breathing circuit
If the water in the water chamber is above the maximum safety level, it can
enter the patient's airways and prevent sufficient oxygen supply and
ventilation.
▪The LM 2000 may only be used with Löwenstein Medical’s ventilation
tubes, which have been specially developed for the correct operation of
the device. The use of water chambers not approved by Löwenstein
Medical may affect performance or safety; for example, the humidifier
may not immediately signal that the maximum safety level of water in
the water chamber is exceeded.
▪Clinical operators or medical staff decide on their own responsibility
whether to activate or deactivate the level sensor.
WARNING
Icons
Table 6: Icons/labels
Warning of a danger point
Warning of electrical voltage
Do not open the device when it is connected to a power source – risk of
electric shock
Warning of hot surfaces – Avoid direct contact
Non-sterile
Do not use blades
Please observe the user manual
Please observe the user manual
Date of manufacture
(Year – Month)
NON
STERILE

Chapter
3
Device overview
Icons
20 09382-03 - 06.05.2021 - LM 2000
Table 6: Icons/labels
Manufacturer
Do not use hooks
This side up
Batch code
Product code
Serial number
Sensitive to moisture
Sensitive toheat
Temperature limits
Fragile
The device must be disposed of in accordance with EU Directive
2002/96/EC. Contact the responsible Löwenstein Medical sales partner.
Applied parts type BF