AmpliVox 170 User manual

D-0115687-J
INSTRUCTION FOR USE

ABOUT THIS MANUAL
1 MODEL 170 INSTRUCTION FOR USE
ABOUT THIS MANUAL
READ THIS OPERATING MANUAL BEFORE ATTEMPTING TO USE THE INSTRUMENT.
This manual is valid for the Model 170 (applies from firmware version 2N22 onwards –please refer to
section 1.3).
This product is manufactured by:
Amplivox Ltd
3800 Parkside, Solihull Parkway,
Birmingham Business Park, Birmingham,
West Midlands,
B37 7YG
www.amplivox.com
For all enquiries please contact us under:
Amplivox Ltd
10393 West 70th Street
Eden Prairie
MN 55344
United States
Tel: [phone]
Fax: [phone]
[email protected]
Amplivox Ltd
3800 Parkside, Solihull Parkway,
Birmingham Business Park, Birmingham,
West Midlands,
B37 7YG
United Kingdom
Tel: [phone]
[email protected]

TABLE OF CONTENTS
2 MODEL 170 INSTRUCTION FOR USE
TABLE OF CONTENTS
ABOUT THIS MANUAL 1
TABLE OF CONTENTS 2
1. INTRODUCTION 4
1.1. THANK YOU 4
1.2. INTENDED APPLICATIONS 4
1.3. UNPACKING 4
1.4. FIRMWARE VERSION 4
1.5. STANDARD CONTENTS 4
1.6. OPTIONAL ACCESSORIES 5
1.7. OPTIONAL ACCESSORIES 5
2. IMPORTANT SAFETY INSTRUCTIONS 6
2.1. PRECAUTIONS 6
2.2. ELECTROMAGNETIC COMPATIBILITY (EMC) CONSIDERATIONS 6
2.3. POWER SUPPLY OPTIONS 6
2.4. AUDIOMETER CONNECTIONS 7
2.5. DATA TRANSFER TO A PRINTER 7
2.6. DATA TRANSFER TO A COMPUTER 8
3. USING THE AUDIOMETER 9
3.1. SWITCHING THE AUDIOMETER ON AND OFF 9
3.2. TESTING THE PATIENT RESPONSE SWITCH 9
3.3. AUDIOMETER DISPLAY 9
3.4. AUDIOMETER CONTROLS 9
3.4.1. Multifunction Keys 9
3.4.2. MENU 9
3.4.3. Description of Function of Other Keys 10
3.5. THRESHOLD RETENTION FUNCTION 11
3.5.1. Recording thresholds manually 11
3.5.2. Recording thresholds automatically 11
3.5.3. Reviewing retained thresholds 11
3.6. SAVING AUDIOGRAMS IN INTERNAL MEMORY 12
3.7. LOADING AUDIOGRAMS FROM INTERNAL MEMORY 12
3.8. PRINTING AUDIOGRAMS 12
3.9. DATA TRANSFER TO AUDIBASE OR AMPLISUITE 12
4. SUGGESTED SEQUENCE OF OPERATION AND TEST PROCEDURE 13
4.1. AUDIOMETRY PREPARATION AND AMBIENT CONDITIONS 13
4.2. TEST SYSTEM ARRANGEMENT 13
4.3. HEADSET 13
4.4. PATIENT INSTRUCTIONS 13
4.4.1. Pre-test 14
4.4.2. Familiarisation 14
4.4.3. Test 14
4.4.4. Post-test 14
4.4.5. Error messages 15
5. SPECIFICATION 16

3 MODEL 170 INSTRUCTION FOR USE
5.1. OUTPUT DATA 16
5.2. MAXIMUM HEARING LEVELS PROVIDED AT EACH FREQUENCY 16
5.3. PHYSICAL DATA 16
5.4. EQUIPMENT CLASSIFICATION 17
6. SYMBOLS 18
7. TECHNICAL INFORMATION 19
8. ROUTINE MAINTENANCE 20
8.1. AUDIOMETER MAINTENANCE 20
8.2. TRANSDUCER MAINTENANCE 20
8.3. MAINS ADAPTER MAINTENANCE 20
9. INSTRUMENT STORAGE AND TRANSPORTATION 21
10. CALIBRATION AND REPAIR OF THE INSTRUMENT 21
11. GUARANTEE 21
12. ORDERING CONSUMABLES AND ACCESSORIES 22
13. DISPOSAL INFORMATION 23
APPENDIX 1 - EMC GUIDANCE & MANUFACTURER’S DECLARATION 24
APPENDIX 2 - USE WITH NON-MEDICAL ELECTRICAL EQUIPMENT 28

INTRODUCTION
4 MODEL 170 INSTRUCTION FOR USE
1.INTRODUCTION
1.1. THANK YOU
Thank you for purchasing an Amplivox audiometer. The Amplivox Model 170 is an automatic screening audiometer that
will give many years of reliable service if treated with care.
1.2. INTENDED APPLICATIONS
The Model 170 screening audiometer is designed for use by general practitioners, occupational health staff and child
health professionals and is the ideal instrument for primary care groups, schools and industry. The audiometer may also
be used for manual audiometry, but it is not intended for use to determine the full extent and scope of a patient’s
hearing deficiency.
Test results may be printed using the specified printer option or transferred to a PC running the Amplivox Audibase or
AudiView applications.
1.3. UNPACKING
Open the shipping carton and carefully remove all the equipment. Check against the delivery note that all the
accessories ordered have been included with your audiometer. If anything is missing, please contact Amplivox Customer
Support ([phone]; sa[email protected]k). If you have purchased from a distributor you should contact them
directly.
Please retain the shipping carton and packing materials as the audiometer will need calibrating on an annual basis and
should be returned to Amplivox in its original shipping carton.
1.4. FIRMWARE VERSION
This operating manual is for firmware versions 4v47 onwards. To check the version of firmware on your audiometer
press and hold the MENU button followed by the TALKOVER button.
1.5. STANDARD CONTENTS
Model 170 Audiometer Audiometric headset
Carrying case Patient response switch
Mains adapter Audiogram cards
Operating manual & ampliSuite Calibration certificate

INTRODUCTION
5 MODEL 170 INSTRUCTION FOR USE
1.6. OPTIONAL ACCESSORIES
Additional audiogram cards
Audibase software USB Cable
Printer(s) Printer cable(s)
Audiocups (noise reducing earphone enclosures)
1.7. OPTIONAL ACCESSORIES
Additional audiogram cards
Audibase software USB Cable
Printer(s) Printer cable(s)
Audiocups (noise reducing earphone enclosures)

IMPORTANT SAFETY INSTRUCTIONS
6 MODEL 170 INSTRUCTION FOR USE
2.IMPORTANT SAFETY INSTRUCTIONS
The Model 170 instrument must be used only by practitioners qualified to perform audiometric
tests. It is intended for use as a screening tool.
2.1. PRECAUTIONS
READ THIS OPERATING MANUAL BEFORE ATTEMPTING TO USE THE INSTRUMENT
To comply with the standards IEC 60601-1 for safety and IEC 60601-1-2 for EMC the audiometer is designed to be used
only with the medically-approved mains adapter supplied, which is specified as part of the equipment. Do not use any
other type of mains adapter with this instrument. Refer to Section 12 for the stock number of the adapter.
The audiometer is for indoor use only and should be used only as described in this manual.
The transducers supplied with the audiometer are specifically calibrated with it; if these transducers are changed
calibration will be required.
Do not immerse the unit in any fluids. See Section 8 of this manual for the proper cleaning procedure for the instrument
and its accessories.
Do not use the instrument in an oxygen-rich environment or in the presence of a flammable anaesthetic mixture or
other flammable agents.
Do not drop or otherwise impact this instrument. If the instrument is dropped or damaged, return it to the manufacturer
for repair and/or calibration. Do not use the instrument if any damage is suspected.
The instrument must be stored and used within the specified temperature, pressure and humidity ranges (see Sections
7 and 9).
Do not attempt to open, modify or service the instrument. Return the instrument to the manufacturer or distributor for
all repair and servicing requirements. Opening the instrument will void the warranty.
2.2. ELECTROMAGNETIC COMPATIBILITY (EMC) CONSIDERATIONS
Medical electrical equipment needs special precautions regarding EMC and needs to be installed and put into service
according to the EMC information provided in Appendix 1. This provides guidance on the electromagnetic environment
in which to operate the instrument.
Portable and mobile radio-frequency (RF) communications equipment can affect medical electrical equipment. The
instrument should not be used adjacent to or stacked with other equipment; if this is necessary the instrument should
be observed to verify normal operation.
2.3. POWER SUPPLY OPTIONS
All other connections must be made before connecting the output lead from the adapter into the POWER input socket
on the back of the audiometer. Switch on the mains supply - the indicator on the adapter and the POWER indicator on
the audiometer will both illuminate green, showing that the instrument is ready for use.
The output from mains adapter is fitted with electronic circuit protection. In case of overload the adapter will shut down
and the indicator will be extinguished. When the fault is cleared the adapter will operate as normal.
The input to the mains adapter is protected with a non-replaceable fuse. If this fails the adapter will not operate.

IMPORTANT SAFETY INSTRUCTIONS
7 MODEL 170 INSTRUCTION FOR USE
The mains adapter is the mains disconnect device and therefore the audiometer should be positioned such that easy
access to the mains adapter is possible.
If a replacement mains adapter is required, please contact Amplivox or your Amplivox distributor.
2.4. AUDIOMETER CONNECTIONS
All the relevant accessory terminals and connections are labelled to ensure correct identification and connection as
follows:
Socket Label
Socket Type
Colour
Code
Connected Part
Notes
RIGHT
LEFT
6.3mm jack
6.3mm jack
Red
Blue
Air conduction headset *
PRINTER
RJ12 socket (6-way)
Printer *
See 2.5
USB
USB Connector
Type B
Computer (via USB port)
See 2.6
N/A
6 pin mini DIN
Reserved port; Amplivox
diagnostic use only
See
below
POWER
2.5mm power jack
Mains AC/DC Adapter *
RESPONSE
6.3mm jack
Black
Patient Response Switch *
The relevant part numbers are indicated in Section 12
Note regarding the 6-pin mini DIN connector:
This is a restricted socket for Amplivox use only. No user access is permitted.
For connected parts marked * only connect the accessories supplied with the instrument or supplied
by Amplivox or an Amplivox distributor. These parts have been tested for use with the Model 170
Screening Audiometer for compliance with the standards IEC 60601-1 and IEC 60601-1-2. The use of
accessories other than those specified may compromise compliance with these standards. For other
sockets refer to Appendix 2.
2.5. DATA TRANSFER TO A PRINTER
Please refer to Appendix 2 for important information regarding the connection of non-medical
electrical equipment to medical electrical equipment.

IMPORTANT SAFETY INSTRUCTIONS
8 MODEL 170 INSTRUCTION FOR USE
The audiometer can be upgraded with an option to allow connection to one of two designated portable thermal printers
for printing audiometric test results (see Section 3.6). You must use the designated cable for each printer, which is
supplied with this option.
Upon receipt of the printer it must be initially charged for a minimum of 15 hours prior to use.
2.6. DATA TRANSFER TO A COMPUTER
Please refer to Appendix 2 for important information regarding the connection of non-medical
electrical equipment to medical electrical equipment.
The audiometer is supplied with software to allow connection to a computer for the transfer of test results (see Section
3.7). You must use the designated USB cable which is available from Amplivox (see Section 12).

USING THE AUDIOMETER
9 MODEL 170 INSTRUCTION FOR USE
3.USING THE AUDIOMETER
3.1. SWITCHING THE AUDIOMETER ON AND OFF
Press and briefly hold the switch marked (located on the back panel). No warm-up time is required. The display will
briefly show the model and the type of headphone currently in use. The display will then be similar to that shown in
Section 3.3.
To switch off, press the switch marked again, or press and hold the MENU key followed by the YES (RIGHT) key and
then release both.
3.2. TESTING THE PATIENT RESPONSE SWITCH
Press the patient response switch and the light labelled RESPONSE (above and to the right of the display) will illuminate
green.
3.3. AUDIOMETER DISPLAY
On start-up the display will show the following default setting:-
SIGNAL dBHL FREQUENCY Hz
30dB 1kHz
< > < >
This indicates that when the PRESENT key is pressed, a tone will be presented at 30dBHL at a frequency of 1kHz (1000Hz)
to the designated ear. On start up the audiometer defaults to the left ear.
3.4. AUDIOMETER CONTROLS
3.4.1. MULTIFUNCTION KEYS
Several keys on the audiometer have different functions depending on the actual mode of operation. These are MENU
(OFF), LEFT (NO), RIGHT (YES) and FREQUENCY (MENU SELECT). The use of these keys is described below.
3.4.2. MENU
Press and hold MENU to access the following options. Use the MENU SELECT keys to step through the available options
and then the NO, YES or SIGNAL  keys to select an action or modify a setting. Release of the MENU key then initiates
the action or saves the modified setting and returns to the default display.

USING THE AUDIOMETER
10 MODEL 170 INSTRUCTION FOR USE
Menu Option Description
Switch off?: As described in Section 3.1
Clear test?: Press YES and release MENU to clear the Threshold Retention Function results from the
previous test
Save audiogram to (1): Use the SIGNAL  keys to select the required storage location and press the YES key to
save the audiogram; then release MENU
Load audiogram no (1): Use the SIGNAL  keys to select the required storage location and press the YES key to
load the audiogram; then release MENU
Contrast: Adjust contrast using the SIGNAL  keys; then release MENU
Print audiogram?: Press YES and release MENU; then press YES to confirm the print operation or NO to cancel
Use 250Hz in auto?: Press YES to include 250Hz in an automatic test or NO to exclude from the test
Use 1K5Hz in auto?: Press YES to include 1.5kHz in an automatic test or NO to exclude from the test
Use 8KHz in auto?: Press YES to include 8kHz in an automatic test or NO to exclude from the test
Use familiarization?: Press YES to employ a familiarisation routine at the start of an automatic test sequence on
either ear (see Section 4.5.2)
Store on 2 of 3?: Press YES to activate automatic storage of the threshold level at which the patient makes
2 out of 3 responses in a manual test
Pulse in Manual?: Press the YES key to output a pulse tone in manual mode
2 of 3 in auto?: Press YES to activate automatic storage of the threshold level at which the patient makes
2 out of 3 responses in an automatic test (rather than the default 3 out of 5)
Default level: Use the SIGNAL  keys to adjust the default tone presentation level in manual mode
Select printer: Use the MENU SELECT to select either the Able AP1300 or the Sanibel MPT-II printer
3.4.3. DESCRIPTION OF FUNCTION OF OTHER KEYS
PRINT Press this key to print the current threshold levels; then press YES to confirm the print
operation or NO to cancel
RESET Press this key during an automatic test to cancel the test and return to the default display;
any thresholds already found will be retained
+20dB This enables tone levels to be presented with up to 20dB higher output in manual test
mode; press the key and then use SIGNAL to access the extra 20dB in 5dB steps; an
indicator above the key is used to show that the function is active
AUTO This initiates an automatic test on the indicated ear (see Section 4.5)
RESULTS Use this key at the conclusion of an automatic test to view the results (see Section 4.5.4)
TALK OVER Hold this key to interrupt the test and route the operator’s voice from the front panel
microphone to the headset; the level is adjusted with the SIGNAL  keys; if an

USING THE AUDIOMETER
11 MODEL 170 INSTRUCTION FOR USE
automatic test is in progress the current test frequency will be retested from the default
level when the TALKOVER key is released
LEFT Press once to select the left ear (the indicator above the key illuminates green); if the left
ear is already selected press again to store the displayed signal value as a threshold (see
Section 3.5.1)
RIGHT Press once to select the right ear (the indicator above the key illuminates green); if the
right ear is already selected press again to store the displayed signal value as a threshold
(see Section 3.5.1)
SIGNAL Press the  keys to decrease or increase the level of the tone presented in 5dB steps;
to scroll through the range keep the key pressed
FREQUENCY Press the key to select a lower frequency and the key to select a higher frequency
PRESENT Press to present the displayed test signal to the patient. The “PRESENT” indicator above
the display will be illuminated green during tone presentation.
3.5. THRESHOLD RETENTION FUNCTION
This function records the thresholds for both ears at each frequency tested. Thresholds may be recorded manually or
automatically.
The operator can then review the results at the end of the test and record them on an audiogram card, print them with
the optional printer (see Section 3.6), or transfer the results to a computer (see Section 3.7).
3.5.1. RECORDING THRESHOLDS MANUALLY
Once a threshold has been determined press the “selected” ear key once again. The threshold will be recorded and
displayed as shown in the illustration in Section 3.5.3. Note: this function will not operate if the “Store on 2 of 3” option
has been enabled (see Section 3.5.2).
3.5.2. RECORDING THRESHOLDS AUTOMATICALLY
If the “Store on 2 of 3” option has been enabled (see Section 3.4.2) then a threshold will be recorded automatically by
the audiometer if the patient makes a response to two out of three manual tone presentations at the same level and
frequency. Thresholds determined using the “Store on 2 of 3” option are displayed within square brackets.
3.5.3. REVIEWING RETAINED THRESHOLDS
To review the retained thresholds, select the required frequency using the FREQUENCYkeys. The recorded values
for the left and right ears are shown on the lower line of the display as illustrated below.
SIGNAL dBHL FREQUENCY Hz
30dB 4kHz
20 10
This display shows
thresholds at 4kHz
THRESHOLDS
Left ear 20dBHL
Right ear 10dBHL

USING THE AUDIOMETER
12 MODEL 170 INSTRUCTION FOR USE
To clear the Threshold Retention memory, use the Clear Test menu option described in Section 3.4.2.
3.6. SAVING AUDIOGRAMS IN INTERNAL MEMORY
The user may save up to 12 audiograms, referenced by number, in the internal memory of the audiometer. To save the
current set of audiogram thresholds (these are the “retained” values described in Section 3.5) press and hold the MENU
key, and then press MENU SELECT repeatedly until “Save Audiogram to 1” appears on screen. Use the SIGNAL  keys
to select a location numbered 1-12, and then press the YES key. Release the MENU key once confirmation appears on
the display.
Note that the Save process will overwrite any records that exist in the selected memory location.
3.7. LOADING AUDIOGRAMS FROM INTERNAL MEMORY
Press and hold the MENU key, and then press MENU SELECT repeatedly until “Load Audiogram No 1” appears on screen.
Use the SIGNAL  keys to select a location numbered 1-12, and then press the YES key. Release the MENU key once
confirmation appears on the display.
3.8. PRINTING AUDIOGRAMS
Two designated thermal printers (the Able AP1300 or the Sanibel MPT-II) are available as options for use with the Model
170 audiometer. The correct printer must be selected (use the MENU options described in Section 3.4.2 to make this
selection).
•Connect the PRINTER socket on the audiometer (6-way RJ12) to the printer with the supplied cable (refer to
Section 2.5 of this operating manual for printer set-up). Note that the printer cables for the Able printer (A108)
and Sanibel (A102) are not compatible.
•Ensure that the printer is fully charged, switched on, loaded with paper and ready to print.
•Press the PRINT key and on the prompt “Is printer ready?” press the YES key. The audiogram will then print. To
cancel press NO.
3.9. DATA TRANSFER TO AUDIBASE OR AMPLISUITE
Test results stored within the audiometer may be transferred to the Amplivox Audibase database which is available as
an option and must be installed on to a computer (see Section 12 for the part number). Alternatively, Amplivox
ampliSuite allows data to be transferred to a computer and subsequently viewed, annotated & printed. This software is
supplied on a USB which includes this operating manual.
Refer to the installation & operating instructions provided with Audibase or ampliSuite for further details.

SUGGESTED SEQUENCE OF OPERATION AND TEST PROCEDURE
13 MODEL 170 INSTRUCTION FOR USE
4.SUGGESTED SEQUENCE OF OPERATION AND TEST
PROCEDURE
The following applies to air conduction measurements. Refer also to ISO 8253 for guidance.
4.1. AUDIOMETRY PREPARATION AND AMBIENT CONDITIONS
Refer to the appropriate audiometric standards and other relevant publications for guidance on audiometric testing.
Audiometric testing should always be performed in quiet conditions (e.g. a quiet room or an acoustic booth). The
optional Audiocups can provide an additional level of isolation from ambient noise. For further explanation on
permissible ambient noise levels, please refer to the standard ISO6189.
4.2. TEST SYSTEM ARRANGEMENT
The schematic diagram below shows a typical example of the use of audiometric test equipment. The audiometer is
located on the desk of a seated operator as shown.
The patient is seated in front of the desk facing away from the operator. The patient wears a headset (see Section 4.3)
and responds to test stimuli by use of a hand-held switch which is also connected to the instrument.
4.3. HEADSET
The headset must be fitted by a qualified person to ensure a proper seal and a comfortable fit. The leads from the
headset are connected to the instrument and the headset is then fitted to the patient.
4.4. PATIENT INSTRUCTIONS
The patient should be given the following instructions using the TALKOVER function:
▪“As soon as you hear the tone, press the response switch. When you no longer hear the tone release the response
switch”
Operator
Audiomete
r
Computer (optional)
Patient, wearing
headset
Headset lead
Response switch & lead

SUGGESTED SEQUENCE OF OPERATION AND TEST PROCEDURE
14 MODEL 170 INSTRUCTION FOR USE
4.4.1. PRE-TEST
(1) Switch the audiometer on
(2) Perform a listening check
(3) Decide whether to use the manual or automatic Threshold Retention Function and/or an audiogram card to
record the thresholds
(4) If the automatic Threshold Retention Function is required ensure that the Store on 2 of 3 option is enabled (see
Section 3.5.2) and that a patient response switch is in use
(5) Prepare the test environment & patient (see Sections 4.1 to 4.4)
(6) If the patient response switch is not being used give instructions to the patient to acknowledge any tone
presented by raising or lowering the finger
(7) Select the better hearing ear (according to the patient) by pressing either the LEFT or RIGHT key and start the
familiarisation session.
4.4.2. FAMILIARISATION
(1) Present the tone 30dB at 1kHz for between 1 and 2 seconds. If there is no response at 30dB, increase the
attenuation level in 10dB steps until the patient responds
(2) When the patient responds, wait for 1 to 2 seconds and present the tone again at the same level; however, if the
patient does respond at 30dB, reduce the signal level in 10dB steps, repeating the presentation until there is no
response, then increase the signal level in 5dB steps until the patient responds; wait 1 to 2 seconds and present
the tone again at the same level
(3) If the responses are consistent with the pattern of tone presentation proceed to Section 4.7 and start measuring
the patient’s hearing thresholds; if not, repeat the familiarisation process
4.4.3. TEST
(1) Present the first test tone at 30dB at 1kHz
(2) If the patient responds, reduce the signal level in 10dB steps repeating the presentation until there is no
response; then increase the signal level in 5dB steps until the patient responds
(3) If the patient does not respond, increase the signal level in 5dB steps until there is a response and then continue
with step 4.
(4) Repeat the test by reducing the signal level in 10dB steps until the patient no longer responds. Then increase the
signal level in 5dB steps until they do respond and note this level.
(5) Repeat step 4 until the patient responds three out of a maximum of five times at the same signal level. This
indicates the patient’s hearing threshold level for that frequency. Either mark the threshold on an audiogram card
or press the appropriate ear key once to activate the Threshold Retention Function and save the threshold level
on screen.
(6) Proceed to the next test frequency. It is common practice to test the frequencies in the following order: 1k, 2k,
3k, 4k, 6k, 8k and 500 Hz.
(7) Repeat steps 1 to 6 for the other ear.
4.4.4. POST-TEST
(1) Use the Threshold Retention Function to review the results (See 3.5)
(2) If required do one or more of the following:
▪Record the results on an audiogram card, or
▪Print the results (Section 3.6), or
▪Transfer the results to a computer (Section 3.7)
Refer to Section 3.4.2 to clear the thresholds at the end of a test and, if required, switch off the audiometer.

SUGGESTED SEQUENCE OF OPERATION AND TEST PROCEDURE
15 MODEL 170 INSTRUCTION FOR USE
4.4.5. ERROR MESSAGES
Four error messages are possible while an automatic test is running. Depending on circumstances it may be necessary
to provide further instruction to the patient and/or perform manual familiarisation (see Section 4.4.2).
No response!
This occurs when the patient has made no response and the tone level has reached the maximum value. An option to
repeat the test at that frequency is presented. Press YES to repeat or NO to skip to the next frequency. If the frequency
is skipped the message “Test finished incomplete” will be displayed at the conclusion of the test.
Response always!
This indicates that the patient has not released the response switch and the tone level has reached the minimum value.
An option to repeat the test at that frequency is presented. Press YES to repeat or NO to skip to the next frequency. If
the frequency is skipped the message “Test finished incomplete” will be displayed at the conclusion of the test.
1kHz match exceeded!
This occurs when the threshold level found at the 1kHz re-test differs by more than 10dB from that found for the 1st test
(see Section 4.5.3). An option to repeat the re-test is presented. Press YES to repeat or NO to accept the threshold level
found at the re-test.
Test finished incomplete
This occurs if the audiometer was unable to record a threshold at one or more frequencies (e.g. if no response was
made and the retry option was not chosen). The operator then has the option to use manual audiometry to obtain any
missing thresholds.

SPECIFICATION
16 MODEL 170 INSTRUCTION FOR USE
5.SPECIFICATION
5.1. OUTPUT DATA
Outputs: Left and Right earphone
Frequency range: 125Hz to 8kHz
Frequency accuracy: <1%
Distortion: <2%
Output level range: -10dBHL min; see Section 5.2 for maximum
Output level accuracy: Within 3dB
Output level step size: 5dB
Output transducer: DD45 earphones (supplied)
Tone present: Single, warble or pulsed
Communication: Integral talk over facility
USB interface: Transfer of test results to a computer
5.2. MAXIMUM HEARING LEVELS PROVIDED AT EACH FREQUENCY
Frequency,
Hz
Air conduction,
dBHL (DD45)
Frequency,
Hz
Air conduction,
dBHL (DD45)
125
70
2000
100
250
80
3000
100
500
90
4000
100
750
100
6000
100
1000
100
8000
80
1500
100
5.3. PHYSICAL DATA
Display: 2 lines of 24 characters
Mains Power: 100-240Vac; 50-60Hz; 0.5A
Input Rating: 5Vdc; 1.2 A
Dimensions: 270mm long x 165mm deep x 60mm high
Weight: 0.75kg (approx)
Safety: IEC 60601-1 (plus UL, CSA & EN deviations)

SPECIFICATION
17 MODEL 170 INSTRUCTION FOR USE
EMC: IEC 60601-1-2
CE mark: To the EU Medical Device Regulation
5.4. EQUIPMENT CLASSIFICATION
Type of protection against electric shock Powered via SELV ClassII mains adapter
Degree of protection against electric shock Type B applied part
Degree of protection against ingress of water Not protected
Mode of operation Continuous operation
Equipment mobility Portable
The Model 170 Audiometer is classified as a Class IIa device under Annex II of the EU Medical Devices Regulation. It is
intended for use as a screening audiometer instrument.

SYMBOLS
18 MODEL 170 INSTRUCTION FOR USE
6.SYMBOLS
The following symbols appear on the audiometer or mains adapter:
Definition: Identifies the control by means of which the instrument is switched on from (or returned
to) a standby condition.
Definition: Medical device
Definition: Refer to instruction manual (mandatory).
Definition: Type B applied part –an applied part providing protection against electric shock, particularly
regarding allowable patient leakage current and patient auxiliary current.
The applied parts are the left & right earphones, patient response switch and the associated cables.
Definition: The output from the mains AC adapter is Direct Current.
Definition: Class II equipment –equipment in which protection against electric shock does not rely on
basic insulation only, but in which additional safety precautions such as double insulation or reinforced
insulation are provided, there being no provision for protective earthing or reliance upon installation
conditions.

TECHNICAL INFORMATION
19 MODEL 170 INSTRUCTION FOR USE
7.TECHNICAL INFORMATION
Audiometer
Audiometer type: Type 4 (IEC 60645-1:2001)
Type 4 (ANSI S3.6:2004)
Transducers
Types and reference levels: DD45: ISO 389-1, Table 2
Static headband force: Headphones: 4.5N
Sound attenuation characteristics: ISO8253-1, Table 3
Earphone Sound Attenuation Characteristics
Frequency, Hz
125
250
500
1000
2000
4000
8000
Attenuation, dB
2
5
7
15
25
31
23
Environmental
Operating temperature: +15oC to +35oC
Operating humidity: 30% to 90% (non-condensing)
Atmospheric pressure: 700 hPa to 1060 hPa
Input / Output
Power input: 2.5mm barrel-type socket.
Patient response input: 6.3mm Jack socket
Left & Right outputs: 6.3mm Jack socket
USB: Type B socket
Printer: RJ12 socket (6-way)
Maximum voltage at any output: 12V peak