MedRx AVANT HIT+ User manual

Contents
Getting To Know Your AVANT™ HIT+™……………………………….
3
Computer Requirements………………………………………………
4
Setup System………………………………………………….………
5
Software Installation…………………………………………………..
6
Sound Card Setting……………………………………………………
9
Accessories…………………………………………………………….
10
EMC Precautions………………………………………………………
11
Safety…………………………………………………………………..
14
www.medrx-usa.com
1200 Starkey Rd., #105, Largo, FL 33771 U.S.A.
Toll Free: [phone] • [phone]
Fax: [phone] • Email: [e-mail]

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Getting to Know Your AVANT HIT+
Intended Use Statement:
The MedRx Avant series of HIT devices are acoustic chambers utilizing loudspeakers and
measurement microphones that are used in the verification of overall performance of hearing
aids for adults and children. The measurements are made without the hearing instrument
being worn. These devices are to be operated by professionals with education and/or training
in the field of audiometry.
Indication For Use Statement:
The Avant HIT Chambers are for use by professionals with education and/or training in the field
of audiometry to evaluate the overall performance of hearing aids for adults and children
utilizing loudspeakers and measurement microphones. The measurements are made without
the hearing instrument being worn.
The AVANT HIT+ represents a new era of precision Hearing Instrument Testing for your office.
Compact yet rugged, this PC-Based system is USB powered and performs all required ANSI and
IEC tests. The following section of this manual will familiarize you with the physical features and
accessories of the HIT+ system.

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Computer Requirements
MedRx Minimum Computer Specs:
Windows®-PC compatible computer
Intel™ i5 Dual Core, 2.0 GHz or better
4 GB RAM
20 GB free hard drive space
Available 2.0 USB port
Windows 7, 8 or 10 Professional (32 or 64-bit)
MedRx Recommended Computer Specs:
Windows®-PC Computer
Intel™ i5 Dual Core, 3.2 GHz or better
8 GB RAM or more
Available USB 2.0
Graphics Adapter with 2GB Dedicated Video Memory
50 GB or more free hard drive space
DVD-ROM Drive
High Speed Internet Connection
Windows 10 Professional 64-bit

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Setting up the System
The Reference Microphone (blue) is pre-installed at the factory.
Inside the Test Chamber
Carefully install the coupler microphone (green) as shown in the image above. Take care
when handling these components as they are delicate precision calibrated instruments.
NOTE: Both of the microphone plugs, blue and green, are “keyed”. The arrowhead
molded into the two plugs must facing towards the front on the Avant HIT+ when the
plug is installed.
Once the microphones are installed you must install the HIT Software and Drivers. This
procedure is detailed in the next section of this manual. Should you need assistance with
these steps, contact MedRx Technical Support at [phone] or 727-584-9600.

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Software Installation
1. Insert the MedRx USB Flash Drive
into USB port:
•Launch My Computer
•Locate USB Drive
(E:) may vary depending on the USB port
selected.Consult your computer’s
documentation.
2. Double Click on Setup to launch:
NOTE: If requested, Accept
Permission to Install Software.
3. On the Setup screen, choose Install
Avant HIT.
Also, the Electronic Copy of this
Manual is located under Manual.
4. Wait for the program to setup the
InstallShield Wizard.

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5. This is the Welcome screen
•Click Next.
6. Read the Software License
Agreement. This important
document defines the acceptable
usage of the HIT.
•After reading the Agreement,
Click I accept...
•Click Next.
7. This screen indicates the location of
the program files.
•Click Next.
NOTE: You can install the Software to
a different location, but it is not
recommended.
8. Choose desired Locale
•Click Next.

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9. Ready to Install Program.
•Click Install.
10. Wait while the InstallShield Wizard
installs the Avant HIT program.
•Click Next.
11. When the installation is complete, click
Finish.

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Sound Card Settings
Next you need to set the Default Windows sound card settings. This will route all non-AVANTTM
Windows sounds to the internal sound card of your computer. These sounds include event
notifications such as new e-mail and error warnings as well as audio and video playback.
1. Launch the AVANT HIT software.
2. Open the Advanced Options from
File menu as shown.
3. Open Audio tab.
4. When the audio properties are
configured properly, during driver
installation, the Audio Tab will appear
like the image on the left. If not, use the
pull-down lists to adjust the settings to
match the image.
(Names May Vary Depending on
Operating System)
5. Click Audio Properties.
•In Windows Sound control panel, make
sure the MedRx Audio Device is not set
as default. If it is default, change this by
clicking on your system (non-MedRx)
audio device and then choose Set
Default.
NOTE:The internal sound card on your
computer will likely not have the same
name as this screen shot. Consult your
computer’s documentation for the name of
the internal sound card and set this control
accordingly.

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Accessories
Couplers
The system includes the couplers and adapters shown below. These will allow you to perform all
ANSI and IEC Hearing Instrument Tests.
NOTE:There is a flexible O-ring inside both the 2cc Coupler and the Body Adapter. These must
remain in place for the couplers to function properly. Replacement O-rings are available from MedRx.
The Allen Wrench is used when removing the Reference Microphone for re-calibration or
replacement.
Battery Pills
Battery Pills, also known as Battery Simulators, provide power to the hearing instrument during
testing. The system includes a complete set of Battery Pills as shown below.

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EMC Precautions
The Avant Hearing Instrument Test (HIT) box needs special precautions regarding EMC and
needs to be installed according to the following EMC information.
List of all cables and maximum lengths of cables, transducers and accessories:
Transducer / Accessories
Maximum Cable length
USB Cable
2.9 meters
Battery Simulators (All Versions)
0.3 meters
Microphones (All Versions)
0.3 meters
Warnings!
•The use of accessories, transducers and cables other than those specified, with the
exception of transducers and cables sold by the manufacturer of the Avant Hearing
Instrument Test box as replacement parts for internal components, may result in
increased emissions or decreased immunity of the Avant Hearing Instrument Test
Box.
•The Avant Hearing Instrument Test Box should not be used adjacent to or stacked
with other equipment. If adjacent or stacked use is necessary, the Avant Hearing
Instrument Test box should be observed to verify normal operation in the
configuration in which it will be used.
•The Avant Hearing Instrument Test Box may be interfered with by other equipment,
even if that other equipment complies with CISPR emission requirements.
•The Avant Hearing Instrument Test Box does not have life supporting function
•Portable and mobile RF communications equipment can affect the Avant Hearing
Instrument Test Box.
Guidance and manufacturer’s declaration – electromagnetic emissions
The Avant Hearing Instrument Test box is intended for use in electromagnetic environment specific below. The
customer or the user of the Avant Hearing Instrument Test box should assure that it is used in such an environment.
Emission test
Compliance
Electromagnetic environment - guidance
RF emissions
CISPR 11
Group 1
The Avant Hearing Instrument Test box uses RF
energy only for its internal function. Therefore,
its RF emissions are very low and
are not likely to cause any interference in nearby
electronic equipment.
RF emissions
CISPR 11
Class B
The Avant Hearing Instrument Test box is
suitable for use in all establishments, including
domestic establishments and those directly
connected to the public low - voltage power
supply network that supplies buildings used for
domestic purposes.
Harmonic emissions
IEC 61000-3-2
Non applicable
Voltage fluctuations / flicker emissions
IEC 61000-3-3
Non applicable

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Guidance and manufacturer’s declaration – electromagnetic immunity
The Avant Hearing Instrument Test box is intended for use in electromagnetic environment specific below. The
customer or the user of the Avant Hearing Instrument Test box should assure that it is used in such an environment.
Immunity test
IEC 60601
test level
Compliance level
Electromagnetic
environment - guidance
Electrostatic discharge
(ESD)
IEC 61000-4-2
+/- 6 kV contact
+/- 8 kV air
+/- 6 kV contact
+/- 8 kV air
Floors should be wood,
concrete or ceramic tile. If
floors are covered with
synthetic material, the
relative humidity should be
at least 30%.
Electrical fast transient /
burst
IEC 61000-4-4
+/- 2 kV for power supply
lines
+/- 1 kV for input / output
lines
+/- 2 kV for power supply
lines
+/- 1 kV for input / output
lines
Mains power quality should
be that of a typical
commercial or hospital
environment.
Power frequency (50/60 Hz)
Magnetic field
IEC 61000-4-8
3 A/m
3 A/m
Power frequency magnetic
fields should be at levels
characteristic of a typical
location in a typical
commercial or hospital
environment.
Guidance and manufacturer’s declaration – electromagnetic immunity
The Avant Hearing Instrument Test box is intended for use in electromagnetic environment specific below. The
customer or the user of the Avant Hearing Instrument Test box should assure that it is used in such an environment.
Immunity test
IEC 60601- test level
Compliance level
Electromagnetic environment -
guidance
Portable and mobile RF communications
equipment should be used no closer to any
part of the Avant Hearing Instrument Test
box, including cables, than the
recommended separation distance
calculated from the equation applicable to
the frequency of the transmitter.
Recommended separation distance:
Conducted RF
IEC 61000-4-6
3 Veff 3 Veff
d = 1,17
P×
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2,5 GHz
3 V/m
d = 1,17
P×
80 to 800 MHz
d = 2,33
P×
800 MHz to 2,5 GHz
Where P is the maximum output power
rating of the transmitter in watts (W)
according to the transmitter manufacturer
and d is the recommended separation
distance in meters (m).
Field strengths from fixed RF transmitters,
as determined by an electromagnetic site
survey a, should be less than the
compliance level in each frequency range
b.
Interference may occur in the vicinity of
equipment marked with the following
symbol:
NOTE 1 At 80 MHz and 800 MHz, the higher frequency ranges applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.
a Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land
mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoretically
with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site
survey should be considered. If the measured field strength in the location in which the Avant Hearing Instrument
Test box is used exceeds the applicable RF compliance level above, the Avant Hearing Instrument Test box
should be observed to verify normal operation. If abnormal performance is observed, additional measures may be

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necessary, such as reorienting or relocating the Avant Hearing Instrument Test box.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between
Portable and mobile RF communications equipment and the Avant Hearing Instrument
Test box
The Avant Hearing Instrument Test box is intended to use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the Avant Hearing Instrument Test box can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and the Avant Hearing Instrument Test box as recommended below, according to the
maximum output power of the communications equipment.
Rated
maximum
output power
of transmitter
W
Separation distance according to frequency of transmitter
meters
150 kHz to 80 MHz
d = 1,17
P×
80 MHz to 800 MHz
d = 1,17
P×
800 MHz to 2,5 GHz
d = 2,33
P×
0,01
0,12
0,12
0,233
0,1
0,37
0,37
0,74
1
1,17
1,17
2,33
10
3,7
3,7
7,40
100
11,7
11,7
23,3
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters
(m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output
power rating of the transmitter in watts (W) according to the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz the separation distance for the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption
and reflection from structures, objects and people.

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Safety
Regarding electrical safety, this device is to be used only by professionals in the hearing
healthcare industry.
It is Class II Medical Electrical (ME) equipment that is part of an ME system.
Power is supplied by the USB cable connected to a computer. An in-line optical isolator with
medical power supply is recommended to achieve optimum safety. A medical grade
computer is recommended and a medical grade isolation transformer will help minimize
ground current. It is recommended that powered speakers are connected to an isolation
transformer. The use environment should be between 10°C and 35°C, humidity within 30% to
90%. All components with operator contact are made of bio-compatible materials.
The green “ready” light on the front of the device indicates that the device and software are
ready for use. Mild soapy water on a clean cloth is the preferred cleaning solution.
The Instructions for Use (the Installation and Software Training manuals) are supplied as an
electronic copy on a USB flash drive. Paper copies of the manuals may be also requested from
the company, and will be sent within one business day of the request.
All repairs should be sent to Medrx for evaluation and / or repair.
Symbols that may be used:
Read the instruction manuals for safe usage of the device. (operating instructions)
or SN Indicates that the device serial number will follow.
Type B applied part.
Manufacturer (Medrx)
Authorized Representative in Europe

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Congratulations
Your MedRx system is now set up and ready for use. Please consult the Training Manual and
the Interactive Help Files within the software for instructions and procedures. The Training
Manual is available in PDF format on a USB flash drive and at www.medrx-usa.com in our
Download Section.
Limited Warranty
MedRx, Inc warrants this product to be free from defects in material and workmanship for one
year from the time of purchase. If this system fails to perform as specified during this period, the
purchaser is responsible for calling MedRx at [phone] or [phone]. The company's
representative will advise the owner to either return specific components or the entire system to:
MedRx, Inc.
1200 Starkey Road #105
Largo, FL 33771 USA
MedRx will repair or replace any defective devices, fully test the system and/or components and
ship the system promptly back to the owner. There is no cost for the repair or return shipping,
provided the system is one year old or less and has not been misused, abused or damaged. Such
damage includes, but is not limited to, dropping, exposure to excessive heat greater than 100ºF
and water/liquid damage.
Repair or replacement of the system as provided under this warranty is the sole and exclusive
remedy of the purchaser. MedRx shall not be liable for any consequential or incidental damages
or for breach of any express or implied warranty. Except to the extent of applicable law, any
implied warranty, merchantability or fitness of this product is limited to the duration of this
warranty.
MedRx will, at its discretion, service and repair out of warranty products at the purchaser's
request, charging for parts and labor as necessary.
The limited warranty is deemed void if software or hardware is installed on this product which is
not pre-approved by MedRx, Inc. Approved software includes NOAH™and HIMSA approved
hearing aid manufacturer programming modules for fitting hearing aids.
MedRx, Inc is not responsible for problems resulting from installation of unapproved software or
hardware. In the event of unapproved software or hardware installed on the system causing a
conflict, MedRx will service the product for a fee to be determined at the time of service.
Any extension of this warranty past the initial one-year warranty is subject to the following
(where applicable).
1. A $300 deductible per repair.
2. Extended warranty does not include cables, connectors or peripherals.
3. Extended warranty of the Video Otoscope covers optics only.