Siemens SD 270 User manual

Operating Manual
(Applies from Serial Number 8200 onwards)
SD 270 Diagnostic Audiometer

Overview of SD 270 Audiometer Controls

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Contents
Overview of SD 270 Audiometer Controls 2
Contents 3
1 Introduction 6
- 1.1 Intended applications 6
- 1.2 Unpacking 6
- 1.3 Standard contents 6
- 1.4 Optional accessories 7
- 1.5 Frequently used functions 7
- 1.6 Known contradictions 7
2 Important Safety Instructions 8
- 2.1 Precautions 8
- 2.2 Electromagnetic compatibility (EMC) considerations 9
- 2.3 Mains supply operation 10
- 2.4 Audiometer connections 11
- 2.5 Data transfer to a printer 12
- 2.6 Data transfer to a computer 13
- 2.7 Line in/out connection (audio) 13
3 Using the Audiometer 14
- 3.1 Ambient conditions 14
- 3.2 Switching the audiometer on and off 14
- 3.3 Operating language 14
- 3.4 Testing the patient response switch 15
- 3.5 Audiometer display 15
- 3.6 Audiometer controls 15
- 3.7 Threshold Retention Function 30
- 3.8 Uncomfortable loudness levels 31
- 3.9 Saving audiograms in internal memory 31
- 3.10 Loading audiograms from internal memory 32
- 3.11 Printing audiograms 32
- 3.12 Data transfer to a NOAH database 33

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4 Sequence of Operation and Suggested Test Procedure 34
- 4.1 Pre-test 34
- 4.2 Test 34
- 4.3 Post-test 35
5 Specification 36
- 5.1 Output data 36
- 5.2 Maximum hearing levels provided at each frequency 37
- 5.3 Physical Data 37
- 5.4 Equipment classification 38
6 Symbols 39
7 Technical Information 40
8 Routine Maintenance 43
- 8.1 Audiometer maintenance 43
- 8.2 Transducer maintenance 43
- 8.3 Mains adapter maintenance 45
- 8.4 Perform listening check 45
9 Instrument Storage and Transportation 46
10 Calibration & Return of the Instrument 47
11 Guarantee 48
12 Ordering Consumables & Accessories 49
Appendix 1 ‒ Speech Audiometry 50
- Headphone and Free Field Testing 50
- Operator Monitoring 50
- Test Modes in Speech Audiometry 51
- Display Counter 51
- 1. Live Voice Speech Audiometry to Headphones 52
- 2. Live Voice Speech Audiometry with Contralateral Masking 53
- 3. Recorded Speech Audiometry to Headphones 54
- 4. Recorded Speech Audiometry to Headphones with
Contralateral Masking 55

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- 5. Free Field Live Voice Speech Audiometry 56
- 6. Free Field Recorded Speech Audiometry 57
- 7. Free Field Recorded Speech Audiometry with Competing
Noise (Audiometer-Generated) 58
- 8. Free Field Recorded Speech Audiometry with Competing
Noise (Recorded) 59
Appendix 2 ‒ Free Field Calibration Procedure 60
- 1. Assurance Of Calibration 60
- 2. External Amplifier and Loudspeaker 60
- 3. Calibration Overview 60
- 4. Free-field Speech Calibration 61
- 5. Free-field Warble Tones Calibration 64
- 6. Free-field Live Speech Calibration 67
Appendix 3 ‒ EMC Guidance & Manufacturer’s Declaration 68
Appendix 4 ‒ Use with Non-medical Electrical Equipment 74
Appendix 5 ‒ Technical Support Contacts 81
Disposal information 83

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1 Introduction
Thank you for purchasing a Siemens audiometer. The Siemens
SD 270 is a diagnostic audiometer that will give many years of
reliable service if treated with care.
1.1 Intended applications
The Siemens SD 270 diagnostic audiometer is designed for use by
audiologists, general practitioners, hearing aid dispensers and child
health professionals. Capable of undertaking both air and bone
conduction tests with or without masking, the audiometer also has
many additional features such as the facility to support speech au-
diometry from live or recorded sources, the option to select
free-field equivalent output from the headphones in speech mode
and a range of clinical audiometry tests.
1.2 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 your local Service department – see Appendix 5.
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 for service in its original shipping carton.
1.3 Standard contents
Siemens SD 270 Audiometer Audiometric headset
Bone conductor headset Patient response switch
Mains adaptor, see 2.3 Audiogram cards
Operating manual Calibration certificate
Carrying case

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1.4 Optional accessories
Masking earpiece Microphone and monitor headset
Printer Additional audiogram cards
Printer cable Insert earphones
Data cable for NOAH Link driver disk for NOAH
1.5 Frequently used functions
How to switch on/off or set the language or control the level?
Please refer to section 3 of this instruction.
1.6 Known contradictions
There are no contradictions known for the use and application of
the SD 270 Audiometer.

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2 Important Safety Instructions
Safety Note!
Any modification of the device itself or its accessories is not
allowed and may lead to inaccepteable risk of harm or inju-
ries.
Safety Note!
The SD 270 diagnostic audiometer must be used only by
practitioners qualified to perform audiometric tests. It is
intended for use as a screening and diagnostic 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 for the proper
cleaning procedure for the instrument and its accessories and the
function of single-use parts.
Do not use the instrument in an oxygen-rich environment or in the
presence of a flammable anaesthetic mixture or other flammable
agents.

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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 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 3. 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 unavoidable the instrument should
be observed to verify normal operation.

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2.3 Mains supply operation
The audiometer is designed for continuous operation and is
powered by a mains adapter which is supplied, and specified
as part of the equipment. If a replacement is required, please
contact your local Service department (see Annexx 5).
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 is to the mains adapter is protected with a non-replacea-
ble fuse. If this fails the adapter will not operate.
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.
Safety Note!
DO NOT USE ANY OTHER MAINS ADAPTER WITH THIS IN-
STRUMENT.
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 medical approved mains adapter supplied with
the product. If a replacement is required, please contact your
local Service department (see Annexx 5).