Nox Medical Nox A1s User manual

Nox A1s Manual
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English

Nox A1s Manual
Nox A1s Manual
Version 1.0
Latest Revision: March 2021
Copyright © 2021
Nox Medical - All rights reserved
Manufactured by:
Nox Medical ehf
Katrinartuni 2
IS - 105 Reykjavik
Iceland
Website: www.noxmedical.com
For distributor information go to:
www.noxmedical.com
Copyright Notice
No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or
translated into any language or computer language, in any form, or by any means: electronic, mechanical,
magnetic, optical, chemical, manual, or otherwise, without the prior written authorization from Nox Medical.
License Notice
The Nox A1s recorder’s firmware contains BIGDIGITS multiple-precision arithmetic code originally written by
David Ireland, copyright © 2001-8 by D.I. Management Services Pty Limited <www.di-mgt.com.au>, and is used
with permission.

Nox A1s Manual
Table of Contents
Table of Contents ...................................................................................................................................................3
List of Abbreviations...............................................................................................................................................5
Introduction............................................................................................................................................................7
Intended Use........................................................................................................................................7
Contraindications.................................................................................................................................7
Scope....................................................................................................................................................7
Instructions for Operators ...................................................................................................................8
Warnings and Cautions for Use ...........................................................................................................9
Nox A1s Description .............................................................................................................................................12
Nox A1s Interface...............................................................................................................................12
Operating Nox A1s................................................................................................................................................15
Connecting Nox A1s to a Computer...................................................................................................15
Configuring and Downloading from Nox A1s.....................................................................................16
Manually Starting/Stopping Nox A1s.................................................................................................16
Starting Nox A1s at a Scheduled Time ...............................................................................................17
Nox A1s Status ...................................................................................................................................17
Nox A1s Patient Hookup.......................................................................................................................................20
Inserting a Battery to the Nox A1s.....................................................................................................20
Attaching the Nox A1s and the Nox RIP Belts....................................................................................21
Attaching the Nox Nasal Cannula ......................................................................................................23
Measuring Mask Pressure..................................................................................................................24
Measuring EEG Signals.......................................................................................................................24
Measuring EMG/ECG Signals .............................................................................................................26
Measuring Pulse and Oxygen Saturation using Nonin WristOx2 Pulse Oximeter, Model 3150 BLE .27
Inserting Batteries into the Nonin WristOx2 Pulse Oximeter, Model 3150 BLE ................................29
Selecting Oximeter Sensor Size..........................................................................................................29
Attaching the Nonin WristOx2 Pulse Oximeter, Model 3150 BLE and Nonin WristOx2 Soft Sensor.29
Establishing a Connection between the Nonin 3150 BLE Pulse Oximeter and Nox A1s....................31

Nox A1s Manual
Maintenance.........................................................................................................................................................38
Compatible Sensors and Devices..........................................................................................................................43
Specifications........................................................................................................................................................47
Nox A1s and Accessories....................................................................................................................47
Material Information .........................................................................................................................49
Nox A1s Battery Information .............................................................................................................50
Regulatory Information ........................................................................................................................................51
Performance Testing and Validation Summary .................................................................................51
Nox A1s Classifications.......................................................................................................................51
Description of Symbols and Labels ....................................................................................................52
Bluetooth® Wireless Technology .......................................................................................................54
Electromagnetic Compatibility (EMC) Information............................................................................54
About ....................................................................................................................................................................58

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List of Abbreviations
AASM
-American Academy of Sleep Medicine
ABS
-Acrylonitrile Butadiene Styrene
BMI
-Body Mass Index
CISPR
-Comité International Spécial des Perturbations Radioélectriques (English:
International Special Committee on Radio Interference)
CMDR
-Canada Medical Device Regulations
CPAP
-Continuous positive airway pressure
ECG
-Electrocardiography
EEG
-Electroencephalography
EMG
-Electromyography
EMC
-Electromagnetic compatibility
EOG
-Electrooculography
ESD
-Electrostatic discharges
HF
-High Frequency
IEC
-International Electrotechnical Commission
ISM
-Industrial, Scientific and Medical
MDD
-Medical Device Directive
MRI
-Magnetic Resonance Imaging
NiMH
-Nickel-metal hydride battery rechargeable
PAP
-Positive Airway Pressure
PC
-Polycarbonate
PET
-Polyethylene Terephthalate
PE
-Polyethylene
PG
-Polygraphy
PSG
-Polysomnography
PVC
-Polyvinyl Chloride
RED
-Radio Equipment Directive

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RF
-Radio Frequency
RIP
-Respiratory Inductance Plethysmography
SpO2
-Oxygen Saturation Levels measured by pulse oximetry
TPE
-Thermoplastic Elastomer
WEEE
-Europe on Waste of Electrical and Electronic Equipment

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Introduction
Congratulations on choosing the Nox A1s recorder. The Nox A1s recorder is a body worn sleep recorder
intended to be worn over clothing or pajamas. The Nox A1s recorder is a part of the Nox Sleep System. Its main
function is to record physiological signals by use of built-in sensors and patient applied sensors. The Nox A1s
recorder has a built-in Bluetooth® module also allowing it to communicate with other Nox Sleep System
devices and to record signals from compatible auxiliary devices. The Nox A1s recorder is configured by the
Noxturnal software from Nox Medical, running on a PC, that also allows for the review, organization, analyzing,
and summarizing of all signals recorded by the device. The complexity of the study is defined by varying the
number and types of physiological signals measured, supporting both ambulatory and online sleep testing.
During online configuration of the Nox Sleep System, commands and data are sent between the Nox A1s
recorder and the Noxturnal software by use of the Nox C1 Access Point from Nox Medical. The Nox A1s
recorder can communicate over Bluetooth link, either direct or via the Nox C1 Access Point (depending on the
system configuration), with Noxturnal App from Nox Medical running on a mobile platform for device control
and online review of signals being recorded.
Intended Use
The Nox Sleep System is used as an aid in the diagnosis of different sleep disorders and for the assessment of
sleep.
The Nox Sleep System is used to measure, record, display, organize, analyze, summarize and retrieve
physiological parameters during sleep and wake in patients greater than 2 years of age.
The Nox Sleep System allows the user to decide on the complexity of the study by varying the number and
types of physiological signals measured.
The Nox Sleep System allows for generation of user/pre-defined reports based on subject’s data.
The users of the Nox Sleep System are medical professionals who have received training in the areas of
hospital/clinical procedures, physiological monitoring of human subjects, or sleep disorder investigation.
The intended environments are hospitals, institutions, sleep centers, sleep clinics, or other test environments,
including patient’s home.
Contraindications
The Nox Sleep System does not provide any alarms and is not intended to be used for continuous monitoring
where failure to operate can cause injuries or death of the patient.
Scope
This manual covers the use of the Nox A1s recorder and its components along with external sensors and
auxiliary devices that have been validated with the Nox Sleep System.
The use of Nox A1 Recorder and its components along with external sensors and auxiliary devices that have
been validated with the Nox Sleep System is covered in
●Nox A1 Manual
The pictures below show the different appearance of the Nox A1s Recorder and the Nox A1 Recorder. Please
be sure you are following the correct manual for your recorder.

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Nox A1 Recorder Nox A1s Recorder
The use of the Noxturnal software application that is needed for device configuration, data download, review,
and analysis as well as the use of the Nox C1 Access Point that is needed for the online setup of the Nox Sleep
System are covered in:
●Noxturnal Manual
●Nox C1 Manual
This manual is only intended for professionals (healthcare professionals and service personnel) with relevant
qualifications and skills. Additional material can be found on the Nox Medical Website.
Instructions for Operators
The Nox A1s recorder is only intended to be set-up and maintained by professionals (healthcare professionals
and service personnel) with relevant qualifications and skills according to the instructions given in the
“Operating Nox A1s”, “Nox A1s Patient Hookup” and “Maintenance” sections. The ONLY operation that
patients might have to perform by themselves at home during a PSG study is to start recordings that have
been configured to be manually started
1
. In that case, the professional setting up the Nox A1s recorder and
hooking up the patient shall demonstrate how to start the recording manually and train the patient to do so
according to the “Manually Starting/Stopping a Recording” section.
Operators should contact Nox Medical or its sales representatives
●for assistance, if needed, in setting up, attaching, operating or maintaining the Nox Sleep System, its
accessories, and as applicable external sensors and auxiliary devices that have been validated with the
system; or
●to report unexpected operation or events.
Support information and information about Nox Medical’s sales representative can be found on Nox Medical’s
website: www.noxmedical.com/distributors.
1
The patient might perform the hook-up on him/herself or with the assistance of a family member when conducting a
simple PG study in the home environment (similar as with the Nox T3/Nox T3s recorder). In this case the patient is either
instructed how to perform the hookup by a qualified healthcare professional before he/she is sent home with the system
or directed to a video file that demonstrates the hook-up process.

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Warnings and Cautions for Use
Warning: The Nox Sleep System is NOT certified to be used for continuous monitoring where
failure to operate can cause injuries or death of the patient.
Caution: The Nox A1s recorder complies with the international standard IEC 60601-1-2 for
electromagnetic compatibility for medical electrical equipment and/or systems. That standard is
designed to provide reasonable protection against harmful interference in a typical medical
installation. However, because of the proliferation of radio-frequency transmitting equipment and
other sources of electrical noise in healthcare and other environments, it is possible that high levels
of interference due to close proximity or strength of source might disrupt the performance of the
device, affecting recorded signals and therefore data analysis and resulting in possible incorrect
treatment. Medical electrical equipment needs special precautions regarding Electromagnetic
Compatibility (EMC), and needs to be installed and put into service according to the EMC
information provided in the “EMC Information” section of this manual.
Warning: The use of accessories, transducers, sensors, and cables other than those listed in this
manual may result in increased emissions and/or decreased immunity of the Nox Sleep System and
cause injuries to the operator/patient.
Warning: The Nox A1s recorder(s) should not be used adjacent to or stacked with other equipment.
If adjacent or stacked use is necessary, the device(s) should be observed to verify normal operation
in the configuration in which it/they will be used and prevent abnormal operation which might
cause injuries to the operator/patient.
Warning: The Nox Sleep System may be interfered with by other equipment, even if that
equipment complies with International Special Committee on Radio Interference (CISPR) emission
requirements, causing possible patient harm.
Caution: Exposure to radio frequency radiation.
Caution: The Nox A1s recorder is designed to be safe for use for pacemaker patients if the
pacemakers comply with the standard: EN 45502-2-1 Active implantable medical devices. Particular
requirements for active implantable medical devices intended to treat bradyarrhythmia (cardiac
pacemakers) and/or EN 45502-2-2 Active implantable medical devices. Particular requirements for
active implantable medical devices intended to treat tachyarrhythmia (includes implantable
defibrillators). Using non-compliant pacemakers may result in the operation of the pacemaker
being affected by the use of Nox A1s recorder and lead to possible patient harm. Prior to using the
device with pacemaker patients, the operator should consult the accompanying documents of the
pacemaker regarding its certifications and requirements of use or, if necessary, contact the
manufacturer.
Warning: The Nox A1s recorder is not defibrillator proof. Not removing the device from a patient
before defibrillation may lead to the creation of high current density at the electrode sites, causing
burns and leading to possible patient harm. Not removing the device from a patient before
defibrillation may also alter the intended flow of the current, affecting the defibrillation efficiency
and causing injuries or death of the patient.
Warning: The Nox A1s recorder and its accessories are not intended to be used with high frequency
(HF) equipment. Using the device with high frequency (HF) equipment could cause potential
serious harm to the patient.
Warning: The Nox A1s EEG Head Cable/ Nox EEG 5 Lead Gold Electrode Cable do not provide
protection against the effect of the discharge of a cardiac defibrillator nor against high frequency
burns. Not removing the equipment from a patient before defibrillation may lead to the creation of
high current density at the electrode sites, causing burns and leading to possible patient harm.

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Warning: The Nox A1s recorder and accessories are not designed to give a specified degree of
protection against harmful ingress of liquids. Do not autoclave or immerse the device in any kind of
liquids. Ingress of liquids may result in electric shock.
Warning: The Nox A1s recorder is NOT suitable for use in presence of a flammable anesthetic
mixture with air or with oxygen or nitrous oxide. That could lead to the creation of electrostatic
charges or temperature exceeding limits resulting in sparks or ignition, causing burns or explosions.
Warning: Do not use the Nox A1s recorder and accessories during radiography/X-ray studies. The
energy absorption in the device, cables or electrodes might lead to excessive heating and cause
burns.
Warning: As with all medical equipment, carefully route cables and connections to reduce the
possibility of entanglement or strangulation.
Warning: Do not use any part of the Nox Sleep System, including patient cables and electrodes, in a
MRI (Magnetic Resonance Imaging) environment. The energy absorption in conductive materials
might lead to excessive heating and cause burns.
Caution: The Nox A1s recorder and Nox RIP belts should be worn over clothing to prevent allergic
reaction to the equipment materials.
Caution: The Nox RIP belts should fit the patient snugly without being uncomfortably tight to avoid
discomfort.
Warning: The Nox disposable RIP belts, Nox nasal cannula, Nox filter tube connector, Pro Tech
Airflow Thermocouple, Ambu Leads with attached electrode, Ambu Snap-on electrodes, Nonin
Wristband, and Westmed Mask tubing are single patient use. Using the same disposable RIP belts,
cannula, filter tube connector, thermocouple, leads, snap-on electrodes, wristband, and mask
tubing on more than one patient poses a risk of cross-infection.
Warning: The disposable RIP belts are single use. Reusing the belts may affect the quality of
recorded signals and lead to possible incorrect treatment.
Warning: Do not use damaged equipment, sensors, or accessories. This may result in bad
performance of the Nox Sleep System or patient/operator injury.
Warning: The Nox A1s recorder and its accessories should be removed from the patient before use
of the USB connector to prevent electrical shock. The USB connector shall only be used for the
purposes of configuring the device and downloading data from the device.
Warning: There are no user serviceable parts inside the Nox A1s recorder. The device should be
serviced by authorized parties only. Service performed by non-authorized parties may affect data
analysis and result in possible incorrect treatment. The warranty is void if the Nox A1s recorder is
opened (except for opening of the battery compartment).
Warning: No modification of the Nox A1s recorder and its accessories is allowed. Un-authorized
modifications could result in the device not performing as intended and cause serious harm to the
patient. To ensure patient safety and effective use of the Nox Sleep System, only use accessories
that have been validated for use by Nox Medical. Refer to section “Compatible Sensors and
Devices”.
Warning: Remove batteries from the Nox A1s recorder if it is not used within 30 days to prevent
damage from possible battery leakage and prevent possible minor burns to the operator/patient.
Warning: External equipment and all auxiliary devices intended for connection to signal input,
signal output or other connectors shall comply with the relevant product safety standards, e.g. IEC
60950-1 for IT equipment and the IEC 60601 series for medical electrical equipment, to prevent
electric shocks. In addition, all such combinations –systems –shall comply with the safety
requirements stated in the collateral standard IEC 60601-1-1 or the general standard IEC 60601-1,
edition 3/3.1, clause 16. Any equipment not complying with the leakage current requirements in
IEC 60601-1 shall be kept outside the patient environment i.e. at least 1.5 m from the patient
support. Any person who connects external equipment to signal input, signal output or other

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connectors has formed a system and is therefore responsible for the system to comply with the
requirements. If in doubt, contact qualified medical technician or your local representative.
Warning: Avoid accidental contact between connected but unused patient applied parts and other
conductive parts including those connected to protective earth to prevent potential serious harm
to the operator/patient.
Warning: Make sure the conductive parts of electrodes and associated connectors, including the
neutral electrode, do not contact other conductive parts including earth to prevent potential
serious harm to the operator/patient.
Warning: Electrodes should only be used by or in consultation with a healthcare provider familiar
with their proper placement and use. Not using and placing the electrodes correctly may affect
recording of data, and therefore interpretation and diagnostics.
Warning: The electrodes should be applied only to intact, clean skin (e.g. not over open wounds,
lesions, infected or inflamed areas) to prevent infections.
Warning: The Nox EEG 5 Lead Gold Electrode Cables should be properly disposed of if they cannot
be fully cleaned between uses to prevent the risk of cross-infection between patients.
Warning: The Nox EEG 5 Lead Gold Electrode Cables are not certified to be used for electrical
stimulation purposes. Using the product for electrical stimulation purposes might create burns and
cause injuries to the patient.
Caution: The Nox A1s recorder and its accessories should always be transported in the
accompanying carrying case to ensure adequate protection and prevent damage.
Please read this manual carefully before use, especially sections marked with an
exclamation mark.

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Nox A1s Description
The Nox A1s is a body worn sleep recorder. The input channels and built-in capabilities of the device include
the following:
●13 unipolar channels; for recording of electroencephalography (EEG), electrooculography (EOG) and
submental electromyography (EMG)
●1 ground channel
●4 bipolar channels; for recording of electrocardiogram (ECG), periodic limb movements (PLM),
masseter EMG, or other such as additional EMG or airflow
●1 pressure channel; for recording of nasal or mask pressure
●2 respiratory effort channels; for recording of abdomen and thorax ventilatory effort signals
●3-D built-in acceleration sensor; for recording of patient’s position and activity
●Built-in light sensor; for recording of ambient light
●Built-in microphone; for recording of audio and snoring
●Built-in Bluetooth® module; to support wireless connectivity allowing the device to record signals
from compatible auxiliary devices
During online configuration of the Nox Sleep System the Bluetooth function enables the Nox A1s recorder to
communicate with the Noxturnal software and the Noxturnal App via the Nox C1 Access Point for device
control and online review of recorded signals.
During ambulatory configuration of the Nox Sleep System, the Bluetooth function enables the Nox A1s
recorder to communicate with Noxturnal App for device control and online review of recorded signals.
The Nox A1s recorder is powered with one AA battery.
Nox A1s Interface
The Nox A1s recorder interface consists of a display, button, sensor inputs/connections, indicator light and a
USB connector. The USB connector is placed under the battery lid and connects to Nox USBc cable for device
configuration and data download. See the figures and tables below for detailed description.

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NUMBE
R
FUNCTION
INPUT/SENSOR LABEL
1
Display
NA
2
Push button
NA
Light sensor located under the push button
Indicator light for device status in the push button
3
2 Clip strap loops
NA
4
Microphone –For recording of respiratory sounds
NA
5
1 Pressure lock –Connects to nasal cannula/mask
pressure tube
PRES: Pressure input connector
6
13 Unipolar touch proof inputs (10 EEG/EOG, 3 chin
EMG)
●EMG: 1,2, F –Electromyography
(EMG) input connectors
●E2-E1, F4-F3, C4-C3, O2-O1, M2-M1:
Electroencephalography (EEG) and
electrooculography (EOG) input
connectors
7
1 Reference ground input
●PGND: Patient ground
8
4 Bipolar touch proof inputs
●GP1: General purpose bipolar input
connector
●ECG: Electrocardiography (ECG) input
connectors
●LM1, LM2: Electromyography (EMG)
input connectors
9
Battery lid –Covers the battery and the USB
connector
NA

Nox A1s Manual
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10
Battery lid pin
NA
11
2 Metal snaps –Connects to thorax RIP belt
NA
12
2 Metal snaps –Connects to abdomen cable
NA

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Operating Nox A1s
The Nox A1s recorder is only intended to be operated by professionals (healthcare professionals and service
personnel) with relevant qualifications and skills. The ONLY operation that patients might have to perform by
themselves at home
2
is to start recordings that have been configured to be manually started. In that case, the
professional setting up the Nox A1s recorder and hooking up the patient shall demonstrate how to start the
recording manually and train the patient to do so according to the “Manually Starting/Stopping a Recording”
section.
The Nox A1s recorder is operated with one push button located on the front panel. Pressing the button turns
on the display. The display will automatically turn off in 3 minutes.
Connecting Nox A1s to a Computer
Warning: The Nox A1s recorder and its accessories should be removed from the patient
before use of the USB connector to prevent electrical shock. The USB connector shall
only be used for the purposes of configuring the device and downloading data from the
device.
To connect Nox A1s recorder to a computer you need to access the USB connector on the device. The USB
connector is placed under the battery lid making it inaccessible and tamper proof for children. To open the
battery lid, press with the Nox battery Lid Key, accompanying the Nox A1s System Kit, on the battery lid pin
and slide the battery lid down, towards the bottom of the device. The Nox A1s recorder connects to the
computer by using Nox USBc cable. The battery does not have to be inserted while the device is connected to
the computer.
When the Nox A1s recorder is connected to the computer the device display lights up and a message saying
the device is connected to the computer.
2
The patient might perform the hook-up on him/herself or with the assistance of a family member when conducting a
simple PG study in the home environment (similar as with the Nox T3/Nox T3s recorder). In this case the patient is either
instructed how to perform the hookup by a qualified healthcare professional before he/she is sent home with the system
or directed to a video file that demonstrates the hook-up process.

Nox A1s Manual
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Configuring and Downloading from Nox A1s
To download a recording or configure the Nox A1s recorder you will need to start the Noxturnal software
application and connect the device to the computer. Please refer to the Noxturnal manual for more
information on how to perform those tasks.
When you are done working with the device eject it from the Noxturnal software and unplug the Nox USB-C
cable. Insert the battery and close the battery compartment by pressing the lid back towards the device
without causing any strain, then slide it back into position, towards the top of the device.
Manually Starting/Stopping Nox A1s
If the Nox A1s recorder has been configured to start the recording manually, you can use the button to manually
start a recording. Pressing the button turns on the display. The device will instruct you to “Hold button to
record". Please do so until you see “Recording Duration” displayed. Note the button needs to be pressed down
for approximately 4-5 s before “Recording Duration” displays. At this point the device has started to record data
and the REC symbol appears at the top of the screen. After the display turns off, the light under the button will
blink green intermittently indicating that a recording is taking place. Use the same method to manually stop the
recording.
If the duration of the recording has been specified during configuration, the recording will automatically stop
after the specified duration.

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Starting Nox A1s at a Scheduled Time
If the Nox A1s recorder has been configured to automatically start a recording at a scheduled time, there are no
actions required for the recording to start. Pressing the button before the recording has started will display a
countdown to the specified start time of the recording. If the recording has begun, the display shows the current
duration of the recording and the REC symbol appears on the top of the screen.
Nox A1s Status
Indicator Light
The indicator light on the Nox A1s recorder blinks green when a recording is in progress and the device is
functioning normally. When there are any device warnings the indicator light blinks amber. Warnings might
include:
●Battery low
●Device not licensed.
Displays
Information about the recording duration, recording status and device connections is shown on the display. If
the display is turned off, pressing the button turns it on. By pressing the button again, you will loop through the
available displays. The display will turn itself off again after being inactive for 2 minutes.
The display includes information about device connection, time and battery status.

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1. A Bluetooth symbol and an “X”
or a checkmark “ ” are visible on
all displays. This symbol shows
the status of the Bluetooth
connection with the oximeter.
An “X” means there is not
Bluetooth connection, a “ ”
means there is a Bluetooth
connection.
2. The device’s clock. When Nox
A1s is configured, the clock is
synchronized with the PC and is
shown at the top of the display.
3. On the top right corner is a
battery indicator which shows
the battery status. The battery
indicator is full when the device
has fresh batteries.
The first display that shows up after the device is turned on shows information about the recording planned or
ongoing as explained in previous sections. The second display shows the status of the oximeter connection.
1. An “X” next to SpO2
indicates that the
oximeter is not connected
to the device. Once an
oximeter has been
connected, a checkmark
“ ” will appear.
2. The Bluetooth device
address (BDA) of the
oximeter that the device is
trying to connect to or is
connected to.
The third display shows the status of scheduled recordings. It only appears if the device is configured for 2 or 3
scheduled recordings.

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1. Status of scheduled
recordings. The number
of squares represent the
number of recordings
scheduled. A full square
represents a recording
that has already been
recorded successfully. An
empty square represents
a recording yet to be
performed.
Examples of the multiple night status indicator and their meanings can be seen below:
Three empty squares: The device has been configured to record three nights, but no recording has
been performed.
Three squares, the first one full: The device has been configured to record three nights, and one
night has been recorded successfully.

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Nox A1s Patient Hookup
Warning: Do not use damaged equipment, sensors, or accessories. This may result in
bad performance of the Nox Sleep System or patient/operator injury.
Warning: As with all medical equipment, carefully route cables and connections to
reduce the possibility of entanglement or strangulation.
Caution: The Nox A1s recorder and its accessories should always be transported in its
accompanying carrying case to ensure adequate protection and prevent damage.
The Nox A1s recorder is only intended to be hooked-up by professionals (healthcare professionals and service
personnel) with relevant qualifications and skills
3
.
Inserting a Battery to the Nox A1s
The list below is provided to assist the user in selecting the appropriate battery type for a Nox A1s study:
•Alkaline batteries can be used to record from 10 to 12 hours depending on battery type.
•Lithium batteries can be used to record from 20 to 30 hours depending on study type and battery.
•Rechargeable NiMH batteries can be used to record for 1 hour to 1.5 hours per 200 mAh capacity.
Thus, a standard 2000 mAh battery can record from 10 to 15 hours.
Note: Always use fully charged Powerex 2700 mAh Rechargeable Batteries, high
quality alkaline batteries of at least 2000mAh capacity or fresh lithium battery for
each recording to prevent the need for the sleep study to be repeated.
Note: All lithium batteries used with the Nox A1s recorder shall be per the
standard IEC 60086-4 Primary batteries - Part 4: Safety of lithium batteries.
Before you start a recording, you should make sure that the Nox A1s recorder has a new or fully charged
battery. To insert a new battery, do the following:
3
The patient might perform the hook-up on him/herself or with the assistance of a family member when conducting a
simple PG study in the home environment (similar as with the Nox T3/Nox T3s recorder). In this case the patient is either
instructed how to perform the hookup by a qualified healthcare professional before he/she is sent home with the system
or directed to a video file that demonstrates the hook-up process.