Interacoustics AC40 Service Manual
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Interacoustics AC40 Service Manual

Clinical audiometer
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Service Manual

Clinical Audiometer AC40
Part number 8100837 Rev. 2
Valid from 10/2013

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Summary of Contents for Interacoustics AC40

  • Page 1: Service Manual

    Service Manual Clinical Audiometer AC40 Part number 8100837 Rev. 2 Valid from 10/2013...

  • Page 2: Table Of Contents

    Selecting B71 Bone transducer Calibration procedure Free Field and Custom Max Select Free field setup Custom max. Transducer calibration Update procedure - Firmware Installing MHA (Master Hearing Aid) wave files: AC40 Stand Alone Unit, Print Logo Update Appendix A Update News...

  • Page 3: General Information

    The performance and specifications of the instrument can only be guaranteed if it is subject to technical maintenance at least once a year. This should be done by a workshop authorized by Interacoustics (refer to calibration procedure on page 26).

  • Page 4: Survey Of Reference And Max Hearing Level Tone Audiometer

    15.0 6000 19.0 24.0 2000 14.0 6300¹ 19.0 24.0 2500¹ 13.0 8000 18.0 23.0 3000 12.5 WhiteNoise 3150¹ 13.0 4000 14.5 ¹ This value is interpolated on Interacoustics 5000¹ 12.0 17.0 6000 19.0 24.0 6300¹ 19.0 24.0 8000 18.0 23.0...
  • Page 5 AC40 Service Manual Page 5 WhiteNoise ¹ This value is interpolated on Interacoustics...
  • Page 6 AC40 Service Manual Page 6 ANSI HDA 200 Coupler: IEC60318-2 with type 1 adaptor IEC HDA 200 Tone Audiometer Coupler: IEC60318-1 with type 1 adaptor Tone Narrow Band Noise Tone Audiometer Tone Narrow Band Noise ANSI S3.6-2010 ANSI S3.6-2010 Frequency...
  • Page 7 AC40 Service Manual Page 7 ANSI Ear 5A Coupler ANSI S3.7-1995 (HA-2 with 5mm rigid Tube) Tone Audiometer IEC Ear 5A Tone Narrow Band Noise Coupler IEC 60318-5 2006 2ccm ANSI S3.6-2010 ANSI S3.6-2010 Tone Audiometer Tone Narrow Band Noise...
  • Page 8 6300¹ 19.0 24.0 5000¹ 13.0 18.0 8000 12.0 17.0 6000 20.5 25.5 WhiteNoise 6300¹ 19.0 24.0 TEN Noise 25.0 8000 12.0 17.0 WhiteNoise ¹ This value is interpolated on Interacoustics TEN Noise 25.0 ¹ This value is interpolated on Interacoustics...

  • Page 9: Ansi Free Field

    AC40 Service Manual Page 9 ANSI Free Field ANSI Free Field ANSI S3.6-2010 Free Field max SPL Free Field max HL is found by subtracting the selected RETSPL value Binaural Monaural Free Field Power Free Field Line 0° 45° 90°...

  • Page 10: Survey Of Reference And Max Hearing Level Speech Audiometer

    AC40 Service Manual Page 10 Survey of reference and max hearing level Speech Audiometer ANSI Speech ANSI TDH39 Coupler: ANSI S3.7-1995 (NBS-9A) / IEC 60318-3 1998 (6ccm) Speech Audiometer ANSI Ear 3A Speech Speech Noise Coupler: ANSI S3.7-1995 (HA-2 with 5mm rigid Tube) ANSI S3.6-2010...
  • Page 11 AC40 Service Manual Page 11 IEC Speech Calibration TDH39 Coupler IEC 60318-3 1998 (6ccm) Ear 3A Speech Audiometer Coupler IEC 60318-5 2006 Speech Speech Noise Speech Audiometer Speech Speech Noise IEC60645-2 1997 IEC60645-2 1997 IEC60645-2 1997 IEC60645-2 1997 RETSPL MaxHL RETSPL MaxHL...

  • Page 12: Swedish Speech Calibration

    AC40 Service Manual Page 12 Swedish Speech calibration Speech WN 22.5 SWEDEN TDH39 Coupler IEC 60318-3 1998 (6ccm) Speech Audiometer SWEDEN EAR 3A Speech Speech Noise Coupler IEC 60318-5 2006 STAF 1996 STAF 1996 Speech Audiometer RETSPL MaxHL RETSPL MaxHL...

  • Page 13: Norwegian Speech Calibration

    AC40 Service Manual Page 13 Norwegian Speech Calibration Not Linear Speech WN 22.5 Norway TDH39 Coupler IEC 60318-3 1998 (6ccm) Speech Audiometer Norway EAR 3A Speech Speech Noise Coupler IEC 60318-5 2006 Norway Norway Speech Audiometer Speech Speech Noise RETSPL MaxHL RETSPL MaxHL...

  • Page 14: Equivalent Free Field

    AC40 Service Manual Page 14 Equivalent free field Equivalent Free Field Speech Audiometer TDH39 HDA200 HDA280 DD45 IEC60645-2 1997 ISO389-8 2004 ANSI S3.6-2010 PTB – DTU IEC60318-3 1998 IEC60318-1 IEC60318-3 1998 2010 Frequency -17,5 -5,0 -15,0 -21.5 -14,5 -4,5 -14,0 -17.5...
  • Page 15 Earphones: Telephonics TDH39 with a static force of 4.5N 0.5N Calibrated Transducers: Interacoustics DD45 with a static force of 4.5N 0.5N Sennheiser HDA200 with a static force of 10N1.0N Sennheiser HDA280 with a static force of 4.5N 0.5N Radioear B71 with a static force of 5.4N 0.5N...

  • Page 16: Accessories And Parts

    AC40 Service Manual Page 16 Accessories and Parts Accessories Item # IA Item Number Description 8010879 DD45 Audiometric headset/ 8010819 TDH 39 Audiometric headset (Optional) 8010876 DD45 telephone 10 ohm 8010625 TDH39P 10 Ohm Earphone Telephonics 8010817 HBA Audiometric head band...
  • Page 17 AC40 Service Manual Page 17 8010797 EARtone 5A Insert Earphones including 4 large 3C, 10 small 3B and 50 medium 3A Ear tips 8010893 HDA200 Headset 30° plugs 8010796 TDH39AA Audiometric Headset with Amplivox Audiocups 8010901 DD45AA Audiometric Headset with...
  • Page 18 AC40 Service Manual Page 18 8010937 CIR33 Insert earphone kit 8011091 APS3 Patient response switch 8013227 Optical USB 1.1 isolation MED 8006480 Gooseneck 1059 8011241 Cable USB 2m 8011273 Cable TCC connection Minijack to minijack for external CD player 8011237...

  • Page 19: Consumables And Parts

    AC40 Service Manual Page 19 Consumables and Parts Consumables Item # IA Item Number Description 8011371 Pen set and AF12 audiogram chart kit Parts Item # IA Item Number Description PCA Main board 1060 For exchange contact Interacoustics PCA Key board 1060...
  • Page 20 AC40 Service Manual Page 20 8006060 Power Supply 200W – order with cable below 8004427 Cable power supply 2062/1060 8003518 Cable tie 92x2.4mm black For power cable 8010686 Speaker 4ohm with wire and plug For exchange contact Interacoustics 8002686 Cover Display 1060...

  • Page 21: Schematics

    AC40 Service Manual Page 21 Schematics Block Diagram Phone 1/2 Phone 1 L Left Phone Ext . Phone 2 L 2* Mono Output Att . Fix Att. Output Ch 1 Ranges Mute Talk Forward TDH39 +20-100 dB 0-25 dB Output Phone 1 R Input Att .

  • Page 22: Disassembly

    AC40 Service Manual Page 22 Disassembly Open the Cabinet All screws used are Torx To open the cabinet remove - in total 20 pcs. of 3x8mm screws and 2 pcs. of 3x16mm screws After removing the screws the top and bottom part can be divided...

  • Page 23: Remove The Pca Back Board And Side Board

    AC40 Service Manual Page 23 Remove the PCA Back Board and Side Board Remove boards be mean of M3x5mm screws. Notice not to unscrew the spacer nuts. Disconnect the connection cables – when assembling be aware to lock the cables. Disconnect the USB cables from the Side Board pcs.

  • Page 24: Remove The Power Supply

    AC40 Service Manual Page 24 Remove the Power Supply Remove 4x M3x5 screws from the cabinet bottom Remove the cable tiess and disconnect the connection cable Disconnect power and ground cable...

  • Page 25: Remove The Display

    Remove the display cover by means of 6 pcs. 2.5x8mm screws on the rear side. The display cover can be romoved Remove the display glass and the display gasket Remove 4xM3x5mm screws – disconnect the display cable For change of the display cable contact Interacoustics...

  • Page 26: Adjusting The Knobs After Reassembly

    AC40 Service Manual Page 26 Adjusting the knobs after reassembly – Before the covers are mounted check the functionality of the knobs Turn the knob both clockwise and anti-clockwise. While turning the knob, notice the little square on the screen (see detail picture). The square should ONLY move after each “full click”/when ”it feels like the knob clicks’”.
  • Page 27 AC40 Service Manual Page 27 Hold on to the knob and fasten the nut. Check if the other knob has to be adjusted Press the Mask on/off button, to activate it. Turn knob clockwise and anti-clockwise. If the knob has to be adjusted, use same procedure as described.

  • Page 28: Calibration Procedure

    AC40 Service Manual Page 28 Calibration Procedure Service, adjustment and repair Annual calibration (ANSI/ASA S3.6) The calibration procedure will validate all relevant performance requirements given in ANSI/ASA S3.6. After the audiometric equipment has been submitted for calibration, a calibration certificate showing the values recorded must be filled out, signed and dated by the technician, demonstrating that the instrument conforms to all relevant requirements given in this standard.

  • Page 29: Phasing Of Headphones

    Technology (NIST) or equivalent. Test equipment calibration documents are to be kept on file. Calibration Mode Entering The calibration program is activated by selecting: Windows XP: C:\Program Files\Interacoustics\Diagnostic Suite\Calibration AD629AC40.exe Windows 7: C\program files(X86)\Interacoustics\Diagnostic Suite\ Calibration AD629AC40.exe Follow the instructions on the screen.

  • Page 30: Checklist For Calibration

    AC40 Service Manual Page 30 Checklist for calibration Functional checks A /NA Pass/Fail  Visual inspection, safety - Check power cord and accessory cords for signs of wear or damage and general physical condition of instrument.  Headband – Tension.

  • Page 31: Calibration Standard For Audiometer

    AC40 Service Manual Page 31 Calibration standard for Audiometer Select “Standard” to select standard, options IEC or ANSI Select “Calibration method”, to select the calibration method, options SPL mode or HL mode SPL mode: The tab marked “standard” is default set to SPL (sound pressure level) so you don’t have to take the standard for the transducer you are calibrating into account.

  • Page 32: Selecting Tdh39 Headset

    AC40 Service Manual Page 32 Selecting TDH39 headset Select “Transducer Setup” (Figure 2) Select “Headset phone” to select TDH39 headset Enter the serial numbers for the left and right phones in the field “Left” and “Right” Figure 2 Calibration of TDH39 Equipment needed for TDH39 calibration: ...
  • Page 33 AC40 Service Manual Page 33 Select “Transducer Calibration” Place the transducer on the 6cc IEC 60318-3 (IEC 303) coupler (Figure 3) Figure 3 Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier (i.e. 90 dB SPL) (Figure 4)
  • Page 34 AC40 Service Manual Page 34 Repeat “Next” until all stimuli is calibrated, for both left and right transducer.
  • Page 35 AC40 Service Manual Page 35 Write the calibration to Hardware Select the Main menu (Figure 5) Select “Write to hardware” A dialog box will appear with the message “Calibration data successfully written to hardware” Figure 5...

  • Page 36: Selecting Dd45 Headset

    AC40 Service Manual Page 36 Selecting DD45 headset Select “Transducer Setup” (Figure 6) Select “Headset phone” to select DD45 headset Enter the serial numbers for the left and right phones in the field “Left” and “Right” Figure 6 Calibration of DD45 Equipment needed for DD45 calibration: ...
  • Page 37 AC40 Service Manual Page 37 Select “Transducer Calibration” Place the transducer on the 6cc IEC 60318-3 (IEC 303) coupler (Figure 7) Figure 7 Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier (i.e. 90 dB SPL) (Figure 8)
  • Page 38 AC40 Service Manual Page 38 Write the calibration to Hardware Select the Main menu (Figure 9) Select “Write to hardware” A dialog box will appear with the message “Calibration data successfully written to hardware” Figure 9...

  • Page 39: Selecting Hda200 Headset

    AC40 Service Manual Page 39 Selecting HDA200 headset Select “Transducer Setup” (Figure 10) Select “Headset phone” and select HDA200 headset Enter the serial numbers for the left and right phones in the field “Left” and “Right” Figure 10 Calibration of HDA200 Equipment needed for the HDA200 calibrating ...
  • Page 40 AC40 Service Manual Page 40 Select “Transducer Calibration” Place the transducer on the IEC 60318-1 coupler (Figure 11) Figure 11 Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier (i.e. 80 dB SPL) (Figure 12)
  • Page 41 AC40 Service Manual Page 41 Press “Next”, when the Calibration level is obtained, to get the next frequency Repeat “Next” until all stimuli is calibrated, for both left and right transducer.
  • Page 42 AC40 Service Manual Page 42 Write the calibration to Hardware Select the Main menu (Figure 13) Select the “Write to hardware” A dialog box will appear with the message “Calibration data successful written to hardware” Figure 13...

  • Page 43: Selecting Hda280 Headset

    AC40 Service Manual Page 43 Selecting HDA280 headset Select the “Transducer Setup” (Figure 14) Select “Headset phone” and select HDA280 headset Enter the serial numbers for the left and right phone in the field “Left” and “Right” Figure 14 Calibration of HDA280 Equipment needed for the HDA280 calibration: ...
  • Page 44 AC40 Service Manual Page 44 Select “Transducer calibration” Place the transducer on the 6cc IEC 60318-3 (IEC 303) coupler (Figure 15) Figure 15 Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier (i.e. 90 dB SPL) (Figure 16)
  • Page 45 AC40 Service Manual Page 45 transducer.
  • Page 46 AC40 Service Manual Page 46 Write the calibration to Hardware Select the Main menu (Figure 17) Select “Write to hardware” A dialog box will appear with the message “Calibration data successfully written to hardware” Figure 17...

  • Page 47: Selecting Ear3A Insert Phone

    AC40 Service Manual Page 47 Selecting EAR3A Insert phone Select “Transducer Setup” (Figure 18) Select “Insert phone” and select EAR3A Enter the serial numbers for the left and right phones in the field “Left” and “Right” Figure 18 Calibration of EAR3A Equipment needed for calibration of EAR3A: ...
  • Page 48 AC40 Service Manual Page 48 Select “Transducer calibration” Place the transducer on the 2cc 60318-5 (IEC126) coupler (Figure 19) Figure 19 Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier (i.e. 90 dB SPL) (Figure 20)
  • Page 49 AC40 Service Manual Page 49 Press “Next”, when the calibration level is obtained, to get the next frequency Repeat “Next” until all stimuli is calibrated, for both left and right transducer. Write the calibration to Hardware Select the Main menu (Figure 21) Select “Write to hardware”...

  • Page 50: Selecting Ear5A Insert Phone

    AC40 Service Manual Page 50 Selecting EAR5A Insert phone Select “Transducer Setup” (Figure 22) Select “Insert phone” and select EAR5A Enter the serial numbers for the left and right phones in the field “Left” and “Right” Figure 22 Calibration of EAR5A Equipment needed for calibrating the EAR5A: ...
  • Page 51 AC40 Service Manual Page 51 Select the “Transducer Calibration” Place the transducer on the 2cc IEC 60318-5 (IEC126) coupler (Figure 23) Figure 23 Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier (i.e. 90 dB SPL) (Figure 24)
  • Page 52 AC40 Service Manual Page 52 Press “Next”, when the calibration level is obtained, to get the next frequency Repeat “Next” until all stimuli is calibrated, for both left and right transducer.
  • Page 53 AC40 Service Manual Page 53 Write the calibration to Hardware Select the Main menu (Figure 25) Select “Write to hardware” A dialog box will appear with the message “Calibration data successfully written to hardware” Figure 25...

  • Page 54: Selecting Cir22/Cir33 Insert Masking Transducer

    AC40 Service Manual Page 54 Selecting CIR22/CIR33 Insert masking transducer Select “Transducer Setup” (Figure 26) Select “Insert masking transducer” and select CIR22/CIR33 Figure 26 Calibration of CIR22/CIR33 Equipment needed for calibrating the CIR22/CIR33:  Measuring amplifier  Acoustical IEC 60318-5 (IEC126) coupler, fitted with Eartip 10 ...
  • Page 55 AC40 Service Manual Page 55 Select “Transducer calibration” Place the transducer on the 2cc IEC60318-5 (IEC126)coupler (Figure 27) Figure 27 Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier (i.e. 90 dB SPL) (Figure 28)
  • Page 56 AC40 Service Manual Page 56 Write the calibration to Hardware Select the Main menu (Figure 29) Select “Write to hardware” A dialog box will appear with the message “Calibration data successfully written to hardware” Figure 29...

  • Page 57: Selecting B71 Bone Transducer

    AC40 Service Manual Page 57 Selecting B71 Bone transducer Select “Transducer Setup” (Figure 30) Select “Bone conductor or Bone conductor 2” and select B71 Figure 30 Calibration of B71 Equipment needed for calibrating the B71:  Measuring amplifier  Artificial Mastoid IEC 60318-6 ...
  • Page 58 AC40 Service Manual Page 58 Select “Transducer Calibration” Place the transducer on the artificial mastoid. (Figure 31) Figure 31 Adjust the “Adjustment” slider until the calibration level is obtained on the measurement amplifier (i.e. 80 dB SPL) (Figure 32) Figure 32 Note: Remember to add or subtract the correction for your Mastoid Check the frequency accuracy with a frequency counter.
  • Page 59 AC40 Service Manual Page 59 Write the calibration to Hardware Select the Main menu (Figure 33) Select “Write to hardware” A dialog box will appear with the message “Calibration data successfully written to hardware” Figure 33...

  • Page 60: Calibration Procedure Free Field And Custom Max

    AC40 Service Manual Page 60 Calibration procedure Free Field and Custom Max Select standard: ANSI / IEC (Figure 34) Figure 34...

  • Page 61: Select Free Field Setup

    AC40 Service Manual Page 61 Select Free field setup Free Field Setup. Speaker output. Figure 35...

  • Page 62: Custom Max

    AC40 Service Manual Page 62 Custom max. If the speakers / amplifier setup is not powerful enough to stimulate with the predefined maximum output, the maximum output can be decreased to fit the current configuration. To use custom max, follow instructions on screen or below, read carefully before start. (Figure 36) When custom max is not used the check mark (use custom max.
  • Page 63 AC40 Service Manual Page 63...

  • Page 64: Transducer Calibration

    AC40 Service Manual Page 64 Transducer calibration Calibrate left and right speaker. Figure 38...

  • Page 65: Update Procedure - Firmware

    AC40 Stand Alone Unit, Print Logo Update AC40 direct printout allows results to be printed directly after testing (via a supported USB printer – please contact Interacoustics customer service for a list of supported PC printers if in doubt). The printout logo can be configured via the audiometer itself (see below) or via the Diagnostic Suite (in the General Setup a logo impage can be downloaded to the instrument from the PC).
  • Page 66 AC40 Service Manual Page 66 everything on your USB thumb drive* Ensure that ‘FAT32 is selected as your File System- Leave other settings as listed Click Start-depending on the size of your thumb drive these may take a while. When the format is complete you will receive a pop-up indicating it has formatted successfully Copy “update_user.logo.bin”...
  • Page 67 AC40 Service Manual Page 67...

  • Page 68: Appendix A Update News

    AC40 Service Manual Appendix A Page 1 Appendix A Update News Following modifications are made for manual version 8100837 Rev 2 instruments from 10/2013 Minor visual changes to manual format...

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