Siemens SD 270 Service Manual
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Siemens SD 270 Service Manual

Diagnostic audiometer
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Siemens SD 270
Diagnostic Audiometer
Service Manual
(Applies from serial number 7000 onwards)

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Summary of Contents for Siemens SD 270

  • Page 1 Siemens SD 270 Diagnostic Audiometer Service Manual (Applies from serial number 7000 onwards)
  • Page 2 Contents Page 2 D00073611 Siemens SD 270 Service Manual...

  • Page 3: Table Of Contents

    6 Symbols 7 Technical Information 8 Routine Maintenance 8.1 Audiometer maintenance 8.2 Transducer maintenance 8.3 Mains adapter maintenance 9 Instrument Storage and Transportation 10 Calibration and Repair of the Instrument SM010-3 Siemens SD 270 Operating & Service Manual Page 3...
  • Page 4 Appendix 4 - Use with Non-medical Electrical Equipment Appendix 5 - Calibration of the Instrument Appendix 6 - Replacement of Headset Lead Appendix 7 - Enabling Different Earphone Types Appendix 8 - Technical Support Contacts Page 4 D00073611 Siemens SD 270 Service Manual...

  • Page 5: Introduction

    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.

  • Page 6: Important Safety Instructions

    2 Important Safety Instructions 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...

  • Page 7: Electromagnetic Compatibility (Emc) Considerations

    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 Siemens distributor. 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.

  • Page 8: Data Transfer To A Printer

    Siemens or a Siemens distributor. These parts have been tested for use with the Siemens SD 270 Diagnostic 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.

  • Page 9: Data Transfer To A Computer

    Please refer to Appendix 4 for important information regarding the connection of non-medical electrical equipment to medical electrical equipment The Siemens SD 270 has audio line in/out connections for CD or tape player input (e.g. for recorded speech testing) and amplifier output. Important Note: Line out connections are switched on only when FREEFIELD is selected.

  • Page 10: Operating Language

    This indicates that when the PRESENT key is pressed, the tone presented will be at 30dBHL at a frequency of 1kHz (1000 Hz) to the designated ear. Please note that on start up, the audiometer defaults to the left ear. Page 10 D00073611 Siemens SD 270 Service Manual...

  • Page 11: Audiometer Controls

    Display Counter?: Activates a percentage counter for use with speech testing (refer to Appendix 1) Omit 750/1k5/3k/6k: To exclude these frequencies from those available for testing press the YES key SM010-3 Siemens SD 270 Operating & Service Manual Page 11...
  • Page 12 Press once to select the left ear; the indicator above the key illuminates green RIGHT Press once to select the right ear; the indicator above the key illuminates green PULSE Enables pulse tone present function; the indicator above the key illuminates green Page 12 D00073611 Siemens SD 270 Service Manual...
  • Page 13 TALKBACK While selected (as indicated by the indicator above the key) the signal from MIC2 is routed continuously to the MONITOR output. Press the key again to de-select. The SM010-3 Siemens SD 270 Operating & Service Manual Page 13...
  • Page 14 Change this increment by using the UP & DOWN softkeys. Softkey 4 switches between the initial display and a counter that logs and displays the results of the test as a percentage: Page 14 D00073611 Siemens SD 270 Service Manual...

  • Page 15: Threshold Retention Function

    The display will be similar to that shown below, and ULL thresholds are stored and retrieved as described in Section 3.7. SIGNAL FREQUENCY MASKING 40dBHL 1kHz [ 45L] [ 40R] SM010-3 Siemens SD 270 Operating & Service Manual Page 15...

  • Page 16: Saving Audiograms In Internal Memory

    3.12 Data transfer to a NOAH database For transfer of test results stored within the audiometer to a NOAH database you will need the Siemens link driver disc (stock number 105 98 699). This option includes a USB cable to connect to a PC and the necessary installation &...

  • Page 17: Sequence Of Operation And Suggested Test Procedure

    (14) Proceed to the next test frequency and repeat steps 7 to 13 (15) Repeat steps 7 to 14 for the other ear SM010-3 Siemens SD 270 Operating & Service Manual Page 17...

  • Page 18: Post-Test

    Integral talkover and talkback facility Recorded speech: Tape or CD input Live speech: 1 x microphone input Monitoring indicator: VU - (to IEC 60268-17) NOAH interface: Transfer of AC, BC, Speech & ULL test results Page 18 D00073611 Siemens SD 270 Service Manual...

  • Page 19: Maximum Hearing Levels Provided At Each Frequency

    Continuous operation Equipment mobility Portable The SD 270 Audiometer is classified as a Class IIa device under Annex IX (Section 1) of the EU Medical Devices Directive. It is intended for use as a diagnostic audiometer instrument SM010-3 Siemens SD 270 Operating & Service Manual...

  • Page 20: Symbols

    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. Page 20 D00073611 Siemens SD 270 Service Manual...

  • Page 21: Technical Information

    Airborne sound from bone vibrator: See Br. J. Audiol. 1980, P73-75 Environmental Operating temperature: +15 C to +35 Operating humidity: 30% to 90% (non-condensing) Atmospheric pressure: 700 hPa to 1060 hPa SM010-3 Siemens SD 270 Operating & Service Manual Page 21...

  • Page 22: Routine Maintenance

    8 Routine Maintenance 8.1 Audiometer maintenance The Siemens SD 270 audiometer is a precision instrument. Handle it carefully in order to ensure its continued accuracy and service. When cleaning the instrument, first disconnect it from the mains supply. Use a soft cloth and mild detergent to clean the instrument panel when required.

  • Page 23: Mains Adapter Maintenance

    8.3 Mains adapter maintenance Before use check the mains AC adapter for signs of wear and/or damage. If you find any, please replace it immediately by contacting Siemens or your Siemens distributor, requesting part number: 106 75 033. DO NOT USE ANY OTHER MAINS ADAPTER WITH THIS INSTRUMENT.

  • Page 24: Instrument Storage And Transportation

    500 hPa to 1060 hPa 10 Calibration and Repair of the Instrument Siemens recommend that this audiometer should be calibrated on an annual basis. Please contact Siemens or the designated distributor for details of calibration services. See also Appendix 5.

  • Page 25: Ordering Consumables And Accessories

    12 Ordering Consumables and Accessories To order consumables, additional accessories and to replace detachable parts that have been damaged, please contact Siemens for current prices and delivery charges. The items available are listed below: Stock No. Description 87 86 811...

  • Page 26: Appendix 1 - Speech Audiometry

    Appendix 1 - Speech Audiometry The Siemens SD 270 audiometer may be used in the following speech modes of operation. However users should be aware that there is a growing body of professional opinion that Live Voice speech audiometry is generally not recommended.
  • Page 27 2. Live Voice Speech Audiometry with Contralateral Masking Set Up - as described in 1.1 then: a) Select MASK b) Speech-weighted masking is now routed to the opposite earphone to that selected SM010-3 Siemens SD 270 Operating & Service Manual Page 27...
  • Page 28 The MASK rotary control changes the masking level in 5dB steps Page 28 D00073611 Siemens SD 270 Service Manual...
  • Page 29 Section 2.7 of this operating manual b) Press SPEECH & FREE FIELD and use Softkey 1 to ensure that ‘LINE’ is displayed in capitals (indicating that the line input is selected) SM010-3 Siemens SD 270 Operating & Service Manual Page 29...
  • Page 30 Use the SIGNAL rotary control to adjust the signal channel and MASK rotary control to adjust the noise channel Procedure: As described in 3.2 but adjusting the competing noise level as required. Page 30 D00073611 Siemens SD 270 Service Manual...

  • Page 31: Appendix 2 - Free Field Calibration Procedure

    Assurance of Calibration The following is a brief description of the equipment and procedures to be used with the Siemens SD 270 audiometer as a means of performing free- field calibration. However it must be emphasised that it is the responsibility of the equipment operator to ensure that correct free-field calibration has been achieved, and it is recommended that the standards for free-field &...
  • Page 32 90dBSPL as measured by the SLM at the reference point. The response should then be checked to be within the following limits (IEC 60645-2:1993 Section 10.1): Page 32 D00073611 Siemens SD 270 Service Manual...
  • Page 33 If warble tones are to be calibrated (or if the warble tone calibration method is used to equalise the speech frequency response) then the competing noise channel may be calibrated after the SM010-3 Siemens SD 270 Operating & Service Manual Page 33...
  • Page 34 SLM. Change frequency using the keys and then adjust the calibration level for the new frequency using the SIGNAL control to reach the correct level as measured by the SLM Page 34 D00073611 Siemens SD 270 Service Manual...
  • Page 35 90dBSPL as measured by the SLM using dBA settings. Calibrate each channel, pressing the RIGHT and LEFT keys to switch between channels SM010-3 Siemens SD 270 Operating & Service Manual Page 35...
  • Page 36 SLM reads 90dBSPL at the listening point with a 70dBHL setting on the instrument; note that this is an approximate setting only, as it is not possible to produce a true calibration signal in live speech Page 36 D00073611 Siemens SD 270 Service Manual...

  • Page 37: Appendix 3 - Emc Guidance & Manufacturer's Declaration

    Appendix 3 - EMC Guidance & Manufacturer’s Declaration Guidance and manufacturer’s declaration – electromagnetic emissions The SD 270 Audiometer is intended for use in the electromagnetic environment specified below. The customer or user of SD 270 Audiometer should assure that it is used in such an environment.
  • Page 38 Guidance and manufacturer’s declaration – electromagnetic immunity (1) The SD 270 Audiometer is intended for use in the electromagnetic environment specified below. The customer or user of the SD 270 Audiometer should assure that it is used in such an environment.
  • Page 39 IEC 61000-4-8 typical location in a typical commercial or hospital environment. NOTE U is the a.c. mains voltage prior to the application of the test level SM010-3 Siemens SD 270 Operating & Service Manual Page 39...
  • Page 40 Guidance and manufacturer’s declaration – electromagnetic immunity (2) The SD 270 Audiometer is intended for use in the electromagnetic environment specified below. The customer or user of the SD 270 Audiometer should assure that it is used in such an environment.
  • Page 41 RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which the SD 270 Audiometer is used exceeds the applicable RF compliance level above, the SD 270 Audiometer should be observed to verify normal operation.
  • Page 42 Recommended separation distances between portable and mobile RF communications equipment and the SD 270 Audiometer The SD 270 Audiometer is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of...

  • Page 43: Appendix 4 - Use With Non-Medical Electrical Equipment

    16 of IEC 60601-1:2005 are met. The following signal inputs and outputs on the SD 270 audiometer are electrically isolated to the requirements of IEC 60601-1 in order to reduce any potential hazard associated with the use of mains-powered equipment...
  • Page 44 Diagram 1: SD 270 used with the medically-approved mains adapter Mains Outlet Medical Mains Adapter SD 270 Audiometer Page 44 D00073611 Siemens SD 270 Service Manual...
  • Page 45 Diagram 2: SD 270 used with the medically-approved mains adapter and printer Mains Outlet Medical Mains Adapter SD 270 Audiometer Mains Outlet Printer Printer via DATA socket Power Supply SM010-3 Siemens SD 270 Operating & Service Manual Page 45...
  • Page 46 Diagram 3: SD 270 used with the medically-approved mains adapter and PC Mains Outlet Medical Mains Adapter SD 270 Audiometer Mains Outlet Power Supply via USB socket Page 46 D00073611 Siemens SD 270 Service Manual...
  • Page 47 Diagram 4: SD 270 used with the medically-approved mains adapter and CD/Tape player Mains Outlet Medical Mains Adapter SD 270 Audiometer Mains Outlet CD/Tape Player via Line In Socket SM010-3 Siemens SD 270 Operating & Service Manual Page 47...
  • Page 48 Diagram 5: SD 270 used with the medically-approved mains adapter and external amplifier Mains Outlet Medical Mains Adapter SD 270 Audiometer Mains Outlet Amplifier via Line Out Socket Page 48 D00073611 Siemens SD 270 Service Manual...

  • Page 49: Appendix 5 - Calibration Of The Instrument

    Appendix 5 - Calibration of the Instrument Siemens recommend that this audiometer should be calibrated on an annual basis. The procedure is described in the following sections. It is assumed that the required calibration equipment, operating procedures and staff qualified to undertake calibration of audiometric test equipment are available to perform this operation.
  • Page 50 Press the ‘STORE’ key to confirm and exit calibration mode. Secondary Headphone If a secondary type of earphone has been enabled for use with the audiometer (e.g. the E-5A insert earphone) this may be selected from the Page 50 D00073611 Siemens SD 270 Service Manual...
  • Page 51 The levels output when in calibration mode are given below for reference. Bone Masking Air Conduction Conduction Insert Frequency 1000 1500 2000 3000 4000 6000 8000 * These levels should be left uncalibrated at zero. SM010-3 Siemens SD 270 Operating & Service Manual Page 51...

  • Page 52: Appendix 6 - Replacement Of Headset Lead

    (red) earphone 2. Carefully remove the ear-cushion by gently pulling it away from the plastic housing of the headset; the earphone will then be exposed Page 52 D00073611 Siemens SD 270 Service Manual...
  • Page 53 10. Beginning at one side of the earphone assembly carefully re-attach the ear-cushion by gently pulling it over the edge of the earphone and behind the lip of the plastic housing of the headset SM010-3 Siemens SD 270 Operating & Service Manual Page 53...
  • Page 54 14. Connect the headset to the audiometer and test for sound output at a safe listening level 15. The headset is now ready for use Note: for the correct stock number for the headset lead please refer to Section 12 of this manual. Page 54 D00073611 Siemens SD 270 Service Manual...

  • Page 55: Appendix 7 - Enabling Different Earphone Types

    Enter calibration mode using the password as described in Appendix 5 Section 1 Press the TALKBACK key to cycle around the selection of primary earphone, secondary earphone and the main calibration display SM010-3 Siemens SD 270 Operating & Service Manual Page 55...
  • Page 56 THEREFORE - IF AN ALTERNATIVE EARPHONE TYPE IS SELECTED IT IS ESSENTIAL THAT THE ACTUAL HEADPHONE TO BE USED WITH THE AUDIOMETER IS THEN CALIBRATED WITH IT. Page 56 D00073611 Siemens SD 270 Service Manual...
  • Page 57 On completion, the calibration process should be verified. The table in Appendix 5 Section 4 may be used for this purpose, and if necessary the entire calibration process should be repeated. SM010-3 Siemens SD 270 Operating & Service Manual Page 57...

  • Page 58: Appendix 8 - Technical Support Contacts

    Macedonia, Moldavia, Montenegro, Nigeria, North Africa, Oman, Portugal, Romania, Serbia, Slovakia, Spain, Switzerland, Tanzania, Turkey, Turkmenistan Ukraine, Usbekistan. Fax: +49 9131 308-3313 E-mail: audiology.is.cs.healthcare@siemens.com Siemens Audiologische Technik GmbH Reference Number : Replaces edition: Edition: Gebbertstrasse 125 D00073611 2013-02-15 91058 Erlangen Germany Page 58 D00073611 Siemens SD 270 Service Manual...

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