Maico MA 41 User manual

Operation Manual
MA 41

Operation Manual MA 41
8100456 Rev. 10 2 24/04/2017
Table of Contents
Introduction ........................................................................................................ 4
General ............................................................................................................. 4
Intended Use Statement ................................................................................... 4
Indications for Use Statement ........................................................................... 4
Contraindications of Use Statement ................................................................. 4
Essential Performance...................................................................................... 5
Description ........................................................................................................ 5
For your Safety .................................................................................................. 6
How to read this Operation Manual .................................................................. 6
Customer Responsibility ................................................................................... 7
Manufacturer’s Liability ..................................................................................... 7
Regulatory Symbols ......................................................................................... 8
General Precautions ......................................................................................... 9
Electrical Safety and Measuring Security ......................................................... 9
Device Control ................................................................................................ 11
Electromagnetic Compatibility (EMC) ............................................................. 11
Warranty, Maintenance and After-Sales Service .......................................... 12
Warranty ......................................................................................................... 12
Maintenance ................................................................................................... 12
Cleaning and Disinfection Recommendations ................................................ 13
Accessories and Replacement Parts .............................................................. 14
Recycling and Disposal .................................................................................. 14
Unpacking and Hardware Orientation............................................................ 15
Unpacking the System .................................................................................... 15
Hardware Orientation...................................................................................... 17
Operating the Device ....................................................................................... 20
Getting started with the MA 41 ....................................................................... 20
Functionality of Operating Elements ............................................................... 20
The Display of the MA 41 ............................................................................... 23
Measurement Methods of Audiometry ............................................................ 23
User Menu ...................................................................................................... 34
Managing Test Results ................................................................................... 38
Patient Management....................................................................................... 39
Technical Data ................................................................................................. 41
The MA 41 Hardware ..................................................................................... 41
Connections .................................................................................................... 43
Pin Assignment ............................................................................................... 44
Calibration Values and Maximum Levels ........................................................ 45
Electromagnetic Compatibility (EMC) ............................................................. 52
Electrical Safety, EMC and Associated Standards ......................................... 54
Checklist for Subjective Audiometer Testing .................................................. 55

Operation Manual MA 41
8100456 Rev. 10 3 24/04/2017
Title: MA 41 – Operation Manual
Date of issue/last revision: 24/04/2017
MAICO Diagnostics GmbH
Sickingenstr. 70-71
10553 Berlin
Germany
Tel.: + 49 30 / 70 71 46-50
Fax: + 49 30 / 70 71 46-99
E-mail: [e-mail]
Internet: www.maico.biz
FOR NORTH- AND SOUTH AMERICA
MAICO Diagnostics
10393 West 70
th
Street
Eden Prairie, MN 55344
United States
Tel.: [phone]
Fax: [phone]
E-mail: inf[email protected]
Internet: www.maico-diagnostics.com
Copyright © 2017 MAICO Diagnostics.
All rights reserved. No part of this publication may be reproduced or transmitted in any
form or by any means without the prior written permission of MAICO. The information in
this publication is proprietary to MAICO.
Compliance
MAICO Diagnostics is an ISO 13485 certified corporation.
Caution for USA: Federal Law restricts this device to sale by or on the order of a licensed
medical professional.
Trademark Notice
QuickSIN
®
is a U.S. registered trademark of Etymotic Research, Inc.

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Introduction
This section offers you important information about:
 the intended use of the device
 indications and contraindications of use
 essential performance
 features and benefits
 a description of the device
General
Thank you for purchasing a quality product from MAICO Diagnostics. The Audiometer
MA 41 is manufactured to meet all quality and safety requirements, and has been certified
with the CE-symbol according to Medical Directive 93/42/EEC.
In designing the MA 41 we placed particular importance on making it a user-friendly device,
meaning its operation is simple and easy to understand. All functions of the MA 41 are
software controlled, allowing easy upgrades of new features and functions in the future.
The user manual should make it as easy as possible for you to become familiar with the
functions of the MA 41.
If you have questions or ideas for further improvements, please contact us.
Your MAICO Team
Intended Use Statement
The MA 41 is a portable or stand-alone audiometer intended to be used for the identification
of hearing loss and the factors that contribute to the occurrence of the hearing loss in the
age range of children to adults. It is intended to be used by audiologists, ENTs, hearing
healthcare professionals, or other trained technicians in a hospital, clinic, healthcare facility
or other suitable quiet environment as defined in ANSI S3.1 / ISO 8253-1 or equivalent.
Indications for Use Statement
The MA 41 is a portable one and half channel air, bone, and speech audiometer. This
audiometer is used to screen, test, and diagnose hearing loss.
Contraindications of Use Statement
The patient is too young, sick or uncooperative to perform the tasks.

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Essential Performance
The following is considered essential performance:
 To generate and present stimulus signals in the audible range as specified in the
applicable IEC 60645 series in normal condition
 Record and store a patient response
Description
The MA 41 is a portable one and half channel audiometer with pure tone and speech
testing. Additionally, it has limited special audiology test function which include Stenger
and Master Hearing Aid. It can be used as a portable audiometer or a desktop unit for
ENT diagnostics, hearing aid fittings in the office, and for mobile audiometry in clinics and
abroad.
The MA 41 audiometer delivers 11 air conduction (AC) test frequencies from 125 Hz
to 8 kHz, with transducer dependent levels from -10 dB
HL
to 120 dB
HL
. Bone conduction
(BC) can be tested with 10 test frequencies from 250 Hz to 8 kHz with levels from
-10 dB
HL
to 80 dB
HL
(using the included bone oscillator). As an upgrade option, the MA 41
is also capable of high frequency audiometry up to 16 kHz.
The large back lighted LCD color display shows level, frequency, transducer, signal type,
audiograms, and other information for each channel.
The MA 41 performs tests using headphones, bone conduction oscillator, configuration
dependent insert phones and speakers. Built-in test signals include pure tone, pulse tone,
warble tone, narrow band and speech noise. Inputs include ports for a live speech
microphone and a CD player for speech test material. Speech tests can also be imported
via a removable SD memory card. Outputs have separate jacks for air conduction
headphones, bone conduction transducer, configuration dependent insert phones and
sound field speakers.
Furthermore, the patient management feature provides the ability to store results in the
device for further evaluation and documentation.
Results can be printed directly via a USB printer or stored as a PDF file on the included
SD memory card or USB flash drive. The MA 41 can be connected to the PC via USB to
track the session and store the results in NOAH or the MAICO Database.
In order to remain current with present and future technologies the MA 41 is compatible
with PCs, easy to use, extremely reliable, and is adaptable to future developments. It is
also designed to be easily serviced as the need arises.
The speaker outputs are used with the internal amplifies. For use with an external
amplifier or active speaker, contact your authorized service center to change to line output
levels.

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For your Safety
This section offers you important information about:
 how to read the operation manual
 where to spend special attention
 the customer responsibility
 the explanation of all regulatory symbols used
 important cautions and warnings that have to be considered during the
whole time handling and operating your device
How to read this Operation Manual
This Operation Manual contains information pertinent to the use of the MAICO device
system including safety information as well as maintenance and cleaning
recommendations.
READ THIS ENTIRE MANUAL BEFORE ATTEMPTING TO USE THIS
SYSTEM!
Use this device only as described in this manual.
All images and screenshots are only examples and may differ in
appearance from the actual device settings.
In this manual, the following two labels identify potentially dangerous or destructive
conditions and procedures:
The WARNING label identifies conditions or practices that may
present danger to the patient and/or user.
The CAUTION label identifies conditions or practices that could
result in damage to the equipment
NOTE: Notes help you identify areas of possible confusion and avoid potential
problems during system operation.
WARNING
CAUTION

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Customer Responsibility
All safety precautions given in this operation manual must be observed at all times.
Failure to observe these precautions could result in damage to the equipment and injury
to the operator or subject.
The employer should instruct each employee in the recognition and avoidance of unsafe
conditions and the regulations applicable to his or her work environment to control or
eliminate any hazards or other exposure to illness or injury.
It is understood that safety rules within individual organizations vary. If a conflict exists
between the material contained in this manual and the rules of the organization using this
instrument, the more stringent rules should take precedence.
This product and its components performs reliably only when
operated and maintained in accordance with the instructions
contained in this manual, accompanying labels, and/or inserts.
A defective product should not be used. Make sure all
connections to external accessories are snug and secured
properly. Parts which may be broken or missing or are visibly
worn, distorted, or contaminated should be replaced
immediately with clean, genuine replacement parts
manufactured by or available from MAICO.
NOTE: Customer responsibility includes proper maintenance and cleaning of the
device (see Sections 3.2 and 3.3). Breach of the customer responsibility can lead to
limitations of Manufacturer’s Liability and Warranty (see Sections 2.3 and 3.1).
Manufacturer’s Liability
Usage of the device in a way deviant from the intended use leads to a limitation or
termination of the manufacturer’s liability in case of damage. Improper use includes
disregarding the operation manual, the operation of the device by underqualified
personnel as well as making unauthorized alterations on the device.
WARNING

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Regulatory Symbols
The following Table 1 gives an explanation of the symbols used on the device itself, on
the packaging and the accompanying documents including the Operation Manual.
Table 1 Regulatory Symbols
REGULATORY SYMBOLS
SYMBOL DESCRIPTION
Serial number
Date of manufacture
Manufacturer
Caution, consult accompanying documents
Warning, consult accompanying documents
Return to authorized representative, special disposal
required
Reference number
Patient applied part type B according to IEC 60601-1
Refer to instruction manual (mandatory)
Keep away from rain
Transport and storage temperature range
Transport and storage humidity limitations
Voltage transformer
Electrostatic sensitive devices
Do not reuse
Authorized representative
Conforms to European Medical Device Directive 93/42/EEC
ETL listed mark
Logo
REP

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General Precautions
Before starting a measurement make sure, that the device
works properly.
Use and store the instrument indoors only. For operation,
storage and transport conditions see Table in Section 6
Technical Data.
For operation in certain places, a recalibration may be
necessary.
No modification of this equipment is allowed.
Do not drop or otherwise cause undue impact to this device.
If the instrument is dropped or otherwise damaged, return it
to the manufacturer for repair and/or calibration. Do not use
the instrument if any damage is suspected.
Calibration of the instrument: The audiometer and the
headphone complement each other and share the same
serial number (i.e. 7663252). Therefore, the instrument shall
not be used with any other headphone prior to recalibration.
Recalibration also needs to be conducted, when a defected
headphone is replaced.
Uncalibrated instruments may lead to faulty measurements
and sometimes even damage the hearing of the examinee.
Electrical Safety and Measuring Security
This icon indicates that patient applied parts of the
instrument conform to IEC 60601-1 Type B requirements.
In Case of Emergency
In case of emergency, disconnect the instrument from the
computer.
In Case of Emergency
In case of emergency, disconnect the instrument from
power supply.
Do not position the instrument in a way that it is difficult to
operate the disconnection device. The supply mains and
the power socket shall be accessible at all times.
Do not use the instrument if the mains cable and/or the
outlet is damaged.
To transfer data to a PC, establishing a PC-connection via
USB is required. See Section 4.2.4 on how to safely establish
a connection with a power supplied PC or laptop (medical
device/non-medical device) or to a battery-driven laptop.
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING

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This equipment is intended to be connected to other equipment
thus forming a Medical Electrical System. External equipment
intended for connection to signal input, signal output or other
connectors shall comply with the relevant product standard e.g.
IEC 60950-1 for IT equipment and the IEC 60601-series for
medical electrical equipment. In addition, all such combinations
– Medical Electrical Systems – shall comply with the safety
requirements stated the general standard IEC 60601-1,
edition 3, 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 or shall be supplied via a separation transformer
to reduce the leakage currents. Any person who connects
external equipment to signal input, signal output or other
connectors has formed a Medical Electrical System and is
therefore responsible for the system to comply with the
requirements. If in doubt, contact qualified medical technician
or your local representative. If the instrument is connect to a PC
(IT equipment forming a system) ensure not to touch the patient
while operating the PC.
If the instrument is connected to a PC (IT equipment
forming a system) assembly and modifications shall be
evaluated by qualified medical technician according to
safety regulations in IEC 60601.
The instrument is not intended for operation in areas with
an explosion hazard.
Never short-circuit the terminals.
In order to maintain a high level of safety and to ensure the
instrument works properly, it is necessary to have the
instrument and its power supply checked according to the
medical electrical safety standard IEC 60601-1 by a qualified
service technician at least once a year. For more information
see Section 3.
The use of non-calibrated devices can lead to incorrect test
results and is not advisable.
Prevent cable breakage: cables must not be bend or
buckled.
WARNING
WARNING
CAUTION

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Device Control
The user of the device should perform a subjective device check once a week according
ISO 8253-1. See Section 6.7 for a checklist.
For annual calibration please see Sections 2.6 and 3.1.
Electromagnetic Compatibility (EMC)
Electrostatic discharge (ESD) according to IEC 61000-4-2.
Use the device only in an electrostatic controlled
environment.
To avoid the risk of electric shock, this equipment must
only be connected to supply mains with protective earth.
The instrument fulfills the relevant EMC requirements.
Avoid unnecessary exposure to electromagnetic fields,
e.g. from mobile phones etc. If the device is used adjacent
to other equipment it must be observed that no mutual
disturbance appears.
Please also refer to EMC consideration in Section 6.5.
WARNING

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Warranty, Maintenance and After-Sales Service
This section offers you important information about:
 warranty conditions
 maintenance
 cleaning and disinfection recommendations
 accessory and replacement parts
 recycling and disposal of the device
Warranty
The MAICO device is guaranteed for at least one year. Ask your authorized local
distributor for more information.
This warranty is extended to the original purchaser of the instrument by MAICO through
the distributor from whom it was purchased and covers defects in material and
workmanship for a period of at least one year from date of delivery of the instrument to
the original purchaser.
The device shall only be repaired and serviced by your distributor or by an authorized
service center. Opening the instrument case will void the warranty.
No modification of this equipment is allowed.
In the event of repair during the guarantee period, please enclose evidence of purchase
with the instrument.
Maintenance
In order to ensure that the instrument works properly, it has to be checked and calibrated
at least once a year.
The service and calibration must be performed by your dealer or to a service center
authorized by MAICO.
When returning the instrument for repairs or calibration it is essential to send the acoustic
transducers with the device. Please include a detailed description of faults. In order to
prevent damage in transit, please use the original packing when returning the instrument.
WARNING

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Cleaning and Disinfection Recommendations
It is recommended that parts (device and accessories like headphones, ear cushions)
which come in direct contact with the patient be subjected to standard cleaning and
disinfecting procedure between patients.
Recommendations for cleaning and disinfection of MAICO device presented in this
document are not intended to replace or contradict policies in effect or procedures
required for infection control at the facility.
If there is not a high infection potential, MAICO recommends:
 Before cleaning always switch off and disconnect the device from power supply.
 For cleaning use a lightly dampened cloth with soap water solution
 Disinfect the device and its accessories by wiping the surfaces with wet
Sani-Cloth
®
Active wipes or a comparable product and allow them to take effect
for the duration related to the specific disinfection aim listed in product data sheet
of the disinfection product. Please follow also its instructions for cleaning.
 Wipe before and after each patient
 After contamination
 After infectious patients
 Disinfect computer, keyboard, transport trolley etc. with Sani-Cloth
®
Active wipes:
 once a week
 after contamination
 when polluted
To avoid damage of the device and its accessories, please mind
the following:
Do not autoclave or sterilize.
Do not use the device in the presence of fluid that can come into
contact with any of the electronic components or wiring.
Should the user suspect fluids have contacted the system
components or accessories, the unit should not be used until
deemed safe by a MAICO certified service technician.
Do not use hard or pointed objects on the device or its accessories
Use 70 % isopropyl alcohol only on hard cover surfaces
Discard single-use equipment after use! In case of re-use of the
single-use equipment you enhance the risk of cross
contamination!
CAUTION
CAUTION
WARNING

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Accessories and Replacement Parts
Some reusable components are subject to wear with use over time. MAICO recommends
that you keep these replacement parts available (as appropriate for your MA 41 device
configuration). Ask your authorized local distributor when accessories need to be
replaced.
Recycling and Disposal
Within the European Union it is illegal to dispose of
electric and electronic waste as unsorted municipal
waste. According to this, all MAICO products sold after
August 13, 2005, are marked with a crossed-out wheeled
bin. Within the limits of Article (9) of
DIRECTIVE 2002/96/EC on waste electrical and
electronic equipment (WEEE), MAICO has changed their
sales policy. To avoid additional distribution costs we
assign the responsibility for the proper collection and
treatment according to legal regulations to our customers.
Non-European countries Outside the European Union, local regulations should be
followed when disposing of the product after its useful life.

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Unpacking and Hardware Orientation
This section provides information on:
 unpacking the device
 components
 becoming familiar with the hardware inclusive connections
 how to store the device
 rear panel
Unpacking the System
Check Box and Contents for Damage
 It is recommended that you unpack your MA 41 carefully making sure that all
components are removed from the packing materials.
 Verify that all components are included as shown on the packing list included with
your shipment.
 If any component is missing, contact your distributor immediately to report the
shortage.
 If any component appears to be damaged in shipment, contact your distributor
immediately to report it. Do not attempt to use any component or device that
appears to be damaged.
Reporting Imperfections
Notify the carrier immediately if any mechanical damage is noted. This will insure that a
proper claim is made. Save all packaging material so the claim adjuster can inspect it as well.
Report Immediately any Faults
Any missing part or malfunction should be reported immediately to the supplier of the
device together with the invoice, serial number, and a detailed report of the problem.
Keep Packaging for Future Shipment
Save all the original packing material and the shipping container so the device can be
properly packed if it needs to be returned for service or calibration (see Section 3.2).

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The availability of configurations with the following components is country
specific. Contact your local distributor for more information.
Components
DD45 Headphones
*
TDH39 Headphones
*
DD450 Headphones for high frequency audiometry (with High Tone License)
*
B71 Bone Conductor
*
B81 Bone Conductor
*
BKH10 Bone Conductor with contra masking phone
*
Holmco 8103 Headphones
*
IP30 Insert Phones
*
Canton CD220 Free Field Speaker
*
Cable for Canton CD220 Free Field Speaker
Patient Response Switch
Carrying Case
Gooseneck Microphone
USB Cable
USB Flash Drive
SD Memory Card (2 GB)
Sennheiser PC 131 Headset for monitoring and talk forward
Stereo Adaptor, 1/8” to 1/4”
Monitor Phone for examiner
Talk-Back Microphone
Sound Room Patch Cords (single)
Sound Room Kit
CD Player incl. power supply and connecting cable
Operation Manual
Quick Guide
* Calibration required

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Hardware Orientation
4.2.1 Where to Setup
The MA 41 should be operated in a quiet room, so that the audiometric examinations are
not influenced by outside noises. Ambient sound pressure levels in an audiometric test
room shall not exceed the values specified in the norm ISO 8253-1:2010 or
ANSI S3.1-1999. For use in noisier environments, headphones with optional sound
insulation muffs are available.
Electronic devices, which emit strong electromagnetic fields (e.g. microwaves or
radiotherapy devices), can influence the function of the audiometer. Therefore, it is not
recommended to use these devices in close proximity to the audiometer as it may lead to
incorrect test results.
The test room must be at a normal temperature, usually from 15 °C/59 °F to 35 °C/95 °F,
and the device should be switched on approximately 10 minutes before the first
measurement. If the device has been cooled down (e.g. during transport), please wait
until it has warmed to room temperature before using.
External devices such as a computer, printer or Ethernet which
are connected to the device must meet electrical safety
requirements, such as IEC 60601-1 or UL 60601-1.
This is to avoid electrical shock to the user or the patient.
See Section 2 for more information
4.2.2 MA 41 Device
The ergonomic design of the MA 41 makes it easy to control the hearing level,
signal presentation, and frequency adjustments with one hand.
Figure 1
WARNING

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4.2.3 Rear Panel Connections
Figure 2
: Power switch : CD input
: Power socket 100-240VAC/50-60Hz : Speaker left channel
: Network socket : Speaker right channel
: USB out socket : Bone conduction receiver
: USB in socket : Insert phone left channel
: Patient response switch socket : Insert phone right channel
: Talk Back microphone socket : Phone left channel
: Mic - live voice microphone socket : Phone right channel
: Mon - monitor phone output socket
4.2.4 Establishing a Connection to a PC, USB Printer or CD Player
To transfer data to a PC, establishing a PC connection via USB is required. If the MA 41
is used with office equipment that is not a medical device itself (see Table 2,
PC Connection 1), make sure to establish the PC connection in one of the following ways
(see Table 2, PC Connection 2, 3 or 4).
In case a CD player shall be connected proceed accordingly to PC Connection 3
(if used with a CD player with power supply) or 4 (if used with a battery driven CD player).
Make sure you use only office equipment with the device that
is a medical device itself or meets the requirements of
IEC 60950. If a non-medical device is used within the patient
environment (1.5 m from patient as defined in IEC 60601)
a voltage transformer must be used (exception: a battery driven
laptop is used).
WARNING
11
13
14
16
15
12
9
10
8
7
6
5
4
2
1
3
17

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Table 2 PC-Connections
PC CONNECTIONS
PC Connection 1:
Medical device – Medical device
PC Connection 2:
Medical device – Non-Medical device
PC Connection 3:
Medical device – Non-Medical device
PC Connection 4:
Medical device – Laptop (battery-driven)
4.2.5 Storage
When the MA 41 is not in use, store it in a location where it will be safe from damage to
the screen or other sensitive components such as the acoustic transducers and cables.
Store according to the recommended temperature conditions described in Section 6.1.

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Operating the Device
This section offers you information about:
 how to get started with the MA 41
 the device layout
 the function keys
 performing the measurement methods of Audiometry
 patient management
 documentation of results
 changing settings in the user menu
Getting started with the MA 41
Place the MA 41 on a stable counter or table. Plug the power cord into the power socket
on the rear panel. Connect all accessories with the appropriate sockets as shown in
Section 4.2.3. Plug the power cord into a grounded outlet.
Turn On: The device can be turned on with the power switch, which is located on the rear
panel of the MA 41.
NOTE: A device should always be off when inserting or removing an accessory from
the rear panel connectors.
The device performs its initialization and boot up. Please wait until the test screen
appears, this can take up to 90 seconds. If an error is detected the startup is stopped and
a description of the error is shown on the display. In this case please contact your local
dealer for service.
Turn Off: The operation of the device can be safely terminated by using the power switch
found on the rear of the device or by disconnecting the power cable.
Functionality of Operating Elements
The main functions of the MA 41 are directly accessible by using the Function buttons
which are located around the display (see Figure 3). As the buttons have changing
functionality, the actual function of each button is shown in the blue boxes on the screen
above the button.