Service Manual
Clinical Audiometer AC40
Part number 8100837 Rev. 2 Valid from 10/2013
AC40 Service Manual
Page 2
Contents Contents
1
General information
2
Survey of reference and max hearing level Tone Audiometer ANSI Free Field IEC Free Field
3 7 7
Survey of reference and max hearing level Speech Audiometer Swedish Speech calibration Norwegian Speech Calibration Equivalent free field General properties for earphones
8 10 11 12 12
Accessories and Parts Accessories Consumables and Parts
14 14 17
Schematics Block Diagram
19 19
Disassembly Open the Cabinet Remove the PCA Back Board and Side Board Remove the Power Supply Remove the Display Adjusting the knobs after reassembly –
20 20 21 22 23 24
Calibration Procedure Service, adjustment and repair Phasing of headphones Calibration of test equipment Calibration Mode Entering Checklist for calibration Calibration standard for Audiometer Selecting TDH39 headset Selecting DD45 headset Selecting HDA200 headset Selecting HDA280 headset Selecting EAR3A Insert phone Selecting EAR5A Insert phone Selecting CIR22/CIR33 Insert masking transducer Selecting B71 Bone transducer Calibration procedure Free Field and Custom Max Select Free field setup Custom max. Transducer calibration
26 26 27 27 27 28 29 30 33 36 39 42 45 48 51 54 55 56 57
Update procedure - Firmware
58
Installing MHA (Master Hearing Aid) wave files: AC40 Stand Alone Unit, Print Logo Update
58 58
Appendix A Update News
1
AC40 Service Manual
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General information Interacoustics continuously strives to improve its products and their performance, therefore the specifications can be subject to change without notice. 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). Questions about representatives and products may be sent to: Interacoustics A/S Drejervaenget 8 DK 5610 Assens Denmark
Phone: Fax: e-mail: http:
+45 63713555 +45 63713522
[email protected] www.interacoustics.com
AC40 Service Manual
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Survey of reference and max hearing level Tone Audiometer ANSI TDH39 Coupler: ANSI S3.7-1995 (NBS-9A) / IEC 60318-3 1998 (6ccm) Tone Audiometer Tone Narrow Band Noise ANSI S3.6-2010 Frequency 125 160¹ 200¹ 250 315¹ 400¹ 500 630¹ 750 800¹ 1000 1250¹ 1500 1600¹ 2000 2500¹ 3000 3150¹ 4000 5000¹ 6000 6300¹ 8000 WhiteNoise
RETSPL 45.0 37.5 31.5 25.5 20.0 15.0 11.5 8.5 8.0 7.0 7.0 6.5 6.5 7.0 9.0 9.5 10.0 10.0 9.5 13.0 15.5 15.0 13.0
MaxHL 90 95 100 110 115 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 110
TEN Noise
IEC TDH39 Coupler: IEC 60318-3 1998 (6ccm)
ANSI S3.6-2010 RETSPL 49.0 41.5 35.5 29.5 24.0 19.0 15.5 13.5 13.0 12.0 13.0 12.5 12.5 13.0 15.0 15.5 16.0 16.0 14.5 18.0 20.5 20.0 18.0 0.0
MaxHL 75 85 90 95 100 105 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 100 120
25.0
110
¹ The RETSPL is copy from ISO389-1 1998
Tone Audiometer Tone Narrow Band Noise ISO 389-1 1998 Frequency 125 160 200 250 315 400 500 630 750 800 1000 1250 1500 1600 2000 2500 3000 3150 4000 5000 6000 6300 8000 WhiteNoise
RETSPL 45.0 37.5 31.5 25.5 20.0 15.0 11.5 8.5 7.5 7.0 7.0 6.5 6.5 7.0 9.0 9.5 10.0 10.0 9.5 13.0 15.5 15.0 13.0
MaxHL 90 95 100 110 115 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 110
TEN Noise
ISO 389-4 1994 RETSPL 49.0 41.5 35.5 29.5 24.0 19.0 15.5 13.5 12.5 12.0 13.0 12.5 12.5 13.0 15.0 15.5 16.0 16.0 14.5 18.0 20.5 20.0 18.0 0.0
MaxHL 75 85 90 95 100 105 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 110 100 120
25.0
110
ANSI HDA 280 Coupler ANSI S3.7-1995 (NBS-9A) / IEC 60318-3 1998 (6ccm) Tone Audiometer Tone Narrow Band Noise PTB Frequency 125 160¹ 200¹ 250 315¹ 400¹ 500 630¹ 750 800¹ 1000 1250¹ 1500 1600¹ 2000 2500¹ 3000 3150¹ 4000 5000¹ 6000 6300¹ 8000 WhiteNoise
RETSPL 38.5 33.5 29.5 25.0 21.0 17.0 13.0 10.5 9.0 8.5 7.5 8.5 9.5 9.0 8.0 7.0 6.5 7.0 9.5 12.0 19.0 19.0 18.0
MaxHL 105 110 115 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 115 115 105
PTB RETSPL 42.5 37.5 33.5 29.0 25.0 21.0 17.0 15.5 14.0 13.5 13.5 14.5 15.5 15.0 14.0 13.0 12.5 13.0 14.5 17.0 24.0 24.0 23.0 0.0
¹ This value is interpolated on Interacoustics
MaxHL 75 80 85 90 95 95 100 100 105 105 105 105 105 105 105 105 105 105 105 105 95 95 90 120
IEC HDA 280 Coupler IEC 60318-3 1998 (6ccm) Tone Audiometer Tone Narrow Band Noise PTB Frequency 125 160¹ 200¹ 250 315¹ 400¹ 500 630¹ 750 800¹ 1000 1250¹ 1500 1600¹ 2000 2500¹ 3000 3150¹ 4000 5000¹ 6000 6300¹ 8000
RETSPL 38.5 33.5 29.5 25.0 21.0 17.0 13.0 10.5 9.0 8.5 7.5 8.5 9.5 9.0 8.0 7.0 6.5 7.0 9.5 12.0 19.0 19.0 18.0
MaxHL 105 110 115 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 115 115 105
ISO 389-4 1994 RETSPL 42.5 37.5 33.5 29.0 25.0 21.0 17.0 15.5 14.0 13.5 13.5 14.5 15.5 15.0 14.0 13.0 12.5 13.0 14.5 17.0 24.0 24.0 23.0
MaxHL 75 80 85 90 95 95 100 100 105 105 105 105 105 105 105 105 105 105 105 105 95 95 90
AC40 Service Manual WhiteNoise
Page 5 0.0
¹ This value is interpolated on Interacoustics
120
AC40 Service Manual
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ANSI HDA 200 Coupler: IEC60318-2 with type 1 adaptor Tone Audiometer Tone Narrow Band Noise ANSI S3.6-2010 Frequency RETSPL MaxHL 125 30.5 100 160¹ 26.0 105 200¹ 22.0 105 250 18.0 110 315¹ 15.5 115 400¹ 13.5 115 500 11.0 115 630¹ 8.0 120 750 6.0 120 800¹ 6.0 120 1000 5.5 120 1250¹ 6.0 110 1500 5.5 115 1600¹ 5.5 115 2000 4.5 115 2500¹ 3.0 115 3000 2.5 115 3150¹ 4.0 115 4000 9.5 115 5000¹ 14.0 105 6000 17.0 105 6300¹ 17.5 105 8000 17.5 105 9000 19.0 100 10000 22.0 100 11200 23.0 95 12500 27.5 90 14000 35.0 80 16000 56.0 60 18000² 83.0 30 20000² 105.0 15 WhiteNoise
IEC HDA 200 Coupler: IEC60318-1 with type 1 adaptor Tone Audiometer Tone Narrow Band Noise
ANSI S3.6-2010 RETSPL 1/3 MaxHL 34.5 75 30.0 80 26.0 80 22.0 85 19.5 90 17.5 95 15.0 95 13.0 95 11.0 100 11.0 100 11.5 100 12.0 95 11.5 100 11.5 100 10.5 100 9.0 100 8.5 100 10.0 100 14.5 100 19.0 95 22.0 90 22.5 90 22.5 90 24.0 85 27.0 85 28.0 80 32.5 75 40.0 70 61.0 50 88.0 20 110.0 0 0.0 115
¹ The RETSPL is copy from ISO389-8 2001. ² numbers have been established and accepted in the industry
Frequency 125 160 200 250 315 400 500 630 750 800 1000 1250 1500 1600 2000 2500 3000 3150 4000 5000 6000 6300 8000 8000 9000 10000 11200 12500 14000 16000 18000² 20000² WhiteNoise
ISO 389-8 2004
ISO 389-4 1994
RETSPL MaxHL 30.5 100 26.0 105 22.0 105 18.0 110 15.5 115 13.5 115 11.0 115 8.0 120 6.0 120 6.0 120 5.5 120 6.0 110 5.5 115 5.5 115 4.5 115 3.0 115 2.5 115 4.0 115 9.5 115 14.0 105 17.0 105 17.5 105 17.5 105 ISO 389-5 2006
RETSPL 1/3 MaxHL 34.5 75 30.0 80 26.0 80 22.0 85 19.5 90 17.5 95 15.0 95 13.0 95 11.0 100 11.0 100 11.5 100 12.0 95 11.5 100 11.5 100 10.5 100 9.0 100 8.5 100 10.0 100 14.5 100 19.0 95 22.0 90 22.5 90 22.5 90 ISO 389-5 2006 + 5 dB
17.5 19.0 22.0 23.0 27.5 35.0 56.0 83.0 105.0
105 100 100 95 90 80 60 30 15
22.5 24.0 27.0 28.0 32.5 40.0 61.0 88.0 110.0
90 85 85 80 75 70 50 20 0 115
0.0
² numbers have been established and accepted in the industry ANSI EAR 3A Coupler: ANSI S3.7-1995 (HA-2 with 5mm rigid Tube) Tone Audiometer Tone Narrow Band Noise ANSI S3.6-2010 Frequency 125 160 200 250 315 400 500 630 750 800 1000 1250 1500 1600 2000 2500 3000 3150 4000 5000 6000 6300 8000 WhiteNoise
RETSPL 26.0 22.0 18.0 14.0 12.0 9.0 5.5 4.0 2.0 1.5 0.0 2.0 2.0 2.0 3.0 5.0 3.5 4.0 5.5 5.0 2.0 2.0 0.0
MaxHL 90 95 100 105 105 110 110 115 115 115 120 120 120 120 120 120 120 120 115 105 100 100 95
IEC EAR 3A Coupler: IEC 60318-5 2006 2ccm Tone Audiometer Tone Narrow Band Noise
ANSI S3.6-2010 RETSPL 30.0 26.0 22.0 18.0 16.0 13.0 9.5 9.0 7.0 6.5 6.0 8.0 8.0 8.0 9.0 11.0 9.5 10.0 10.5 10.0 7.0 7.0 5.0 0.0
MaxHL 90 95 100 105 105 105 110 110 110 110 110 110 110 110 110 110 110 110 110 105 100 100 95 110
ISO 389-2 1994 Frequency 125 160 200 250 315 400 500 630 750 800 1000 1250 1500 1600 2000 2500 3000 3150 4000 5000 6000 6300 8000 WhiteNoise
RETSPL 26.0 22.0 18.0 14.0 12.0 9.0 5.5 4.0 2.0 1.5 0.0 2.0 2.0 2.0 3.0 5.0 3.5 4.0 5.5 5.0 2.0 2.0 0.0
MaxH L 90 95 100 105 105 110 110 115 115 115 120 120 120 120 120 120 120 120 115 105 100 100 95
ISO 389-4 1994 RETSPL 30.0 26.0 22.0 18.0 16.0 13.0 9.5 9.0 7.0 6.5 6.0 8.0 8.0 8.0 9.0 11.0 9.5 10.0 10.5 10.0 7.0 7.0 5.0 0.0
MaxHL 90 95 100 105 105 105 110 110 110 110 110 110 110 110 110 110 110 110 110 105 100 100 95 110
AC40 Service Manual
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ANSI Ear 5A Coupler ANSI S3.7-1995 (HA-2 with 5mm rigid Tube) Tone Audiometer Tone Narrow Band Noise ANSI S3.6-2010 Frequency 125 160 200 250 315 400 500 630 750 800 1000 1250 1500 1600 2000 2500 3000 3150 4000 5000 6000 6300 8000 WhiteNoise
RETSPL 26.0 22.0 18.0 14.0 12.0 9.0 5.5 4.0 2.0 1.5 0.0 2.0 2.0 2.0 3.0 5.0 3.5 4.0 5.5 5.0 2.0 2.0 0.0
MaxHL 95 95 100 100 105 105 110 115 120 120 120 120 120 120 120 120 120 120 120 110 105 105 100
ANSI S3.6-2010 RETSPL 30.0 26.0 22.0 18.0 16.0 13.0 9.5 9.0 7.0 6.5 6.0 8.0 8.0 8.0 9.0 11.0 9.5 10.0 10.5 10.0 7.0 7.0 5.0 0.0
MaxHL 85 90 95 100 100 105 110 110 110 110 110 110 110 110 110 110 110 110 110 110 105 105 100 110
ANSI CIR 22/CIR33 Coupler ANSI S3.7-1995 (HA-2) Tone Audiometer Tone Narrow Band Noise ANSI S3.6-2010 Frequency 125 160 200 250 315 400 500 630 750 800 1000 1250 1500 1600 2000 2500 3000 3150 4000 5000 6000 6300 8000 WhiteNoise
RETSPL 26.0 22.0 18.0 14.0 12.0 9.0 5.5 4.0 2.0 1.5 0.0 2.0 2.0 2.0 3.0 5.0 3.5 4.0 5.5 5.0 2.0 2.0 0.0
MaxHL 90 95 100 105 105 110 110 115 115 115 120 120 120 120 120 120 120 120 115 105 100 100 90
ANSI S3.6-2010 RETSPL 30.0 26.0 22.0 18.0 16.0 13.0 9.5 9.0 7.0 6.5 6.0 8.0 8.0 8.0 9.0 11.0 9.5 10.0 10.5 10.0 7.0 7.0 5.0 0.0
MaxHL 90 95 100 105 105 105 110 110 110 110 110 110 110 110 110 110 110 110 105 95 95 95 90 110
IEC Ear 5A Coupler IEC 60318-5 2006 2ccm Tone Audiometer Tone Narrow Band Noise ISO 389-2 1994 Frequency 125 160 200 250 315 400 500 630 750 800 1000 1250 1500 1600 2000 2500 3000 3150 4000 5000 6000 6300 8000 WhiteNoise
RETSPL 26.0 22.0 18.0 14.0 12.0 9.0 5.5 4.0 2.0 1.5 0.0 2.0 2.0 2.0 3.0 5.0 3.5 4.0 5.5 5.0 2.0 2.0 0.0
MaxHL 95 95 100 100 105 105 110 115 120 120 120 120 120 120 120 120 120 120 120 110 105 105 100
ISO 389-4 1994 RETSPL 30.0 26.0 22.0 18.0 16.0 13.0 9.5 9.0 7.0 6.5 6.0 8.0 8.0 8.0 9.0 11.0 9.5 10.0 10.5 10.0 7.0 7.0 5.0 0.0
MaxHL 85 90 95 100 100 105 110 110 110 110 110 110 110 110 110 110 110 110 110 110 105 105 100 110
IEC CIR 22/CIR33 Coupler IEC 60318-5 2006 2ccm Tone Audiometer Tone Narrow Band Noise ISO 389-2 1994 Frequency 125 160 200 250 315 400 500 630 750 800 1000 1250 1500 1600 2000 2500 3000 3150 4000 5000 6000 6300 8000 WhiteNoise
RETSPL 26.0 22.0 18.0 14.0 12.0 9.0 5.5 4.0 2.0 1.5 0.0 2.0 2.0 2.0 3.0 5.0 3.5 4.0 5.5 5.0 2.0 2.0 0.0
MaxHL 90 95 100 105 105 110 110 115 115 115 120 120 120 120 120 120 120 120 115 105 100 100 90
ISO 389-4 1994 RETSPL 30.0 26.0 22.0 18.0 16.0 13.0 9.5 9.0 7.0 6.5 6.0 8.0 8.0 8.0 9.0 11.0 9.5 10.0 10.5 10.0 7.0 7.0 5.0 0.0
MaxHL 90 95 100 105 105 105 110 110 110 110 110 110 110 110 110 110 110 110 105 95 95 95 90 110
AC40 Service Manual
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ANSI B71 Coupler ANSI S3.13 Tone Audiometer Tone Narrow Band Noise ANSI S3.6 -2010 Frequency RETSPL MaxHL 125 160 200 250 67.0 45 315 64.0 50 400 61.0 65 500 58.0 65 630 52.5 70 750 48.5 70 800 47.0 70 1000 42.5 70 1250 39.0 70 1500 36.5 70 1600 35.5 70 2000 31.0 75 2500 29.5 80 3000 30.0 80 3150 31.0 80 4000 35.5 80 5000 40.0 60 6000 40.0 50 6300 40.0 50 8000 40.0 50 WhiteNoise
IEC B71 Coupler 60318-6 2007 Tone Audiometer Tone Narrow Band Noise
ANSI S3.6 - 2010 RETSPL 71.0 68.0 65.0 62.0 57.5 53.5 52.0 48.5 45.0 42.5 41.5 37.0 35.5 36.0 37.0 40.5 45.0 45.0 45.0 45.0 42.5
MaxHL 35 40 55 55 60 60 60 60 60 60 60 65 65 65 65 65 50 45 40 40 70
ISO 389-3 1994 Frequency RETSPL MaxHL 125 160 200 250 67.0 45 315 64.0 50 400 61.0 65 500 58.0 65 630 52.5 70 750 48.5 70 800 47.0 70 1000 42.5 70 1250 39.0 70 1500 36.5 70 1600 35.5 70 2000 31.0 75 2500 29.5 80 3000 30.0 80 3150 31.0 80 4000 35.5 80 5000 40.0 60 6000 40.0 50 6300 40.0 50 8000 40.0 50 WhiteNoise
ISO 389-4 1994 RETSPL 71.0 68.0 65.0 62.0 57.5 53.5 52.0 48.5 45.0 42.5 41.5 37.0 35.5 36.0 37.0 40.5 45.0 45.0 45.0 45.0 42.5
MaxHL 35 40 55 55 60 60 60 60 60 60 60 65 65 65 65 65 50 45 40 40 70
ANSI DD45 Coupler: IEC 60318-3 1998 (6ccm) IEC DD45 Coupler: IEC 60318-3 1998 (6ccm)
Tone Audiometer Tone Narrow Band Noise PTB – DTU 2010 Frequency RETSPL MaxHL 125 47.5 90 160¹ 40.5 95 200¹ 33.5 100 250 27.0 110 315¹ 22.5 115 400¹ 17.5 120 500 13.0 120 630¹ 9.0 120 750 6.5 120 800¹ 6.5 120 1000 6.0 120 1250¹ 7.0 120 1500 8.0 120 1600¹ 8.0 120 2000 8.0 120 2500¹ 8.0 120 3000 8.0 120 3150¹ 8.0 120 4000 9.0 120 5000¹ 13.0 120 6000 20.5 115 6300¹ 19.0 115 8000 12.0 110 WhiteNoise TEN Noise
ISO 389-4 1994 RETSPL 51.5 44.5 37.5 31.0 26.5 21.5 17.0 14.0 11.5 11.5 12.0 13.0 14.0 14.0 14.0 14.0 14.0 14.0 14.0 18.0 25.5 24.0 17.0 0
MaxHL 75 80 90 95 100 105 110 110 110 110 110 110 110 110 110 110 110 110 110 110 105 105 100 120
25.0
110
¹ This value is interpolated on Interacoustics
Tone Audiometer Tone Narrow Band Noise PTB – DTU 2010 Frequency 125 160¹ 200¹ 250 315¹ 400¹ 500 630¹ 750 800¹ 1000 1250¹ 1500 1600¹ 2000 2500¹ 3000 3150¹ 4000 5000¹ 6000 6300¹ 8000 WhiteNoise TEN Noise
RETSPL 47.5 40.5 33.5 27.0 22.5 17.5 13.0 9.0 6.5 6.5 6.0 7.0 8.0 8.0 8.0 8.0 8.0 8.0 9.0 13.0 20.5 19.0 12.0
MaxHL 90 95 100 110 115 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120 115 115 110
ISO 389-4 1994 RETSPL 51.5 44.5 37.5 31.0 26.5 21.5 17.0 14.0 11.5 11.5 12.0 13.0 14.0 14.0 14.0 14.0 14.0 14.0 14.0 18.0 25.5 24.0 17.0 0
MaxHL 75 80 90 95 100 105 110 110 110 110 110 110 110 110 110 110 110 110 110 110 105 105 100 120
25.0
110
¹ This value is interpolated on Interacoustics
AC40 Service Manual
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ANSI Free Field ANSI Free Field ANSI S3.6-2010 Binaural 0°
45°
Free Field max SPL Free Field max HL is found by subtracting the selected RETSPL value Free Field Power Free Field Line
Monaural 90°
0°
45°
90°
Frequency RETSPL RETSPL RETSPL RETSPL RETSPL 125 22.0 21.5 21.0 24.0 23.5 160 18.0 17.0 16.5 20.0 19.0 200 14.5 13.5 13.0 16.5 15.5 250 11.5 10.5 9.5 13.5 12.5 315 8.5 7.0 6.0 10.5 9.0 400 6.0 3.5 2.5 8.0 5.5 500 4.5 1.5 0.0 6.5 3.5 630 3.0 -0.5 -2.0 5.0 1.5 750 2.5 -1.0 -2.5 4.5 1.0 800 2.0 -1.5 -3.0 4.0 0.5 1000 2.5 -1.5 -3.0 4.5 0.5 1250 3.5 -0.5 -2.5 5.5 1.5 1500 2.5 -1.0 -2.5 4.5 1.0 1600 1.5 -2.0 -3.0 3.5 0.0 2000 -1.5 -4.5 -3.5 0.5 -2.5 2500 -4.0 -7.5 -6.0 -2.0 -5.5 3000 -6.0 -11.0 -8.5 -4.0 -9.0 3150 -6.0 -11.0 -8.0 -4.0 -9.0 4000 -5.5 -9.5 -5.0 -3.5 -7.5 5000 -1.5 -7.5 -5.5 0.5 -5.5 6000 4.5 -3.0 -5.0 6.5 -1.0 6300 6.0 -1.5 -4.0 8.0 0.5 8000 12.5 7.0 4.0 14.5 9.0 WhiteNoise 0.0 0.0 0.0 0.0 0.0
Tone
RETSPL Max SPL 23.0 97 18.5 93 15.0 94.5 11.5 96.5 8.0 93.5 4.5 96 2.0 94.5 0.0 93 -0.5 92.5 -1.0 92 -1.0 92.5 -0.5 93.5 -0.5 92.5 -1.0 96.5 -1.5 93.5 -4.0 91 -6.5 94 -6.0 94 -3.0 94.5 -3.5 93.5 -3.0 94.5 -2.0 96 6.0 87.5 0.0
NB Max SPL 82 83 84.5 86.5 83.5 86 84.5 83 82.5 87 82.5 83.5 82.5 86.5 83.5 81 84 84 84.5 83.5 84.5 86 72.5 90
Tone Max SPL 102 98 104.5 106.5 103.5 106 104.5 103 102.5 107 102.5 103.5 102.5 106.5 103.5 101 104 104 104.5 108.5 104.5 106 92.5
NB Max SPL 97 93 99.5 101.5 98.5 101 99.5 98 97.5 102 97.5 98.5 97.5 101.5 98.5 96 94 94 99.5 98.5 99.5 96 87.5 100
IEC Free Field IEC
Free Field
ISO 389-7 2005 Binaural 0°
45°
Free Field max SPL Free Field max HL is found by subtracting the selected RETSPL value Free Field Power Free Field Line
Monaural 90°
0°
45°
Frequency RETSPL RETSPL RETSPL RETSPL RETSPL 125 22.0 21.5 21.0 24.0 23.5 160 18.0 17.0 16.5 20.0 19.0 200 14.5 13.5 13.0 16.5 15.5 250 11.5 10.5 9.5 13.5 12.5 315 8.5 7.0 6.0 10.5 9.0 400 6.0 3.5 2.5 8.0 5.5 500 4.5 1.5 0.0 6.5 3.5 630 3.0 -0.5 -2.0 5.0 1.5 750 2.5 -1.0 -2.5 4.5 1.0 800 2.0 -1.5 -3.0 4.0 0.5 1000 2.5 -1.5 -3.0 4.5 0.5 1250 3.5 -0.5 -2.5 5.5 1.5 1500 2.5 -1.0 -2.5 4.5 1.0 1600 1.5 -2.0 -3.0 3.5 0.0 2000 -1.5 -4.5 -3.5 0.5 -2.5 2500 -4.0 -7.5 -6.0 -2.0 -5.5 3000 -6.0 -11.0 -8.5 -4.0 -9.0 3150 -6.0 -11.0 -8.0 -4.0 -9.0 4000 -5.5 -9.5 -5.0 -3.5 -7.5 5000 -1.5 -7.5 -5.5 0.5 -5.5 6000 4.5 -3.0 -5.0 6.5 -1.0 6300 6.0 -1.5 -4.0 8.0 0.5 8000 12.5 7.0 4.0 14.5 9.0 WhiteNoise 0.0 0.0 0.0 0.0 0.0
90°
Tone
RETSPL Max SPL 23.0 97 18.5 93 15.0 94.5 11.5 96.5 8.0 93.5 4.5 96 2.0 94.5 0.0 93 -0.5 92.5 -1.0 92 -1.0 92.5 -0.5 93.5 -0.5 92.5 -1.0 96.5 -1.5 93.5 -4.0 91 -6.5 94 -6.0 94 -3.0 94.5 -3.5 93.5 -3.0 94.5 -2.0 96 6.0 87.5 0.0
NB Max SPL 82 83 84.5 86.5 83.5 86 84.5 83 82.5 87 82.5 83.5 82.5 86.5 83.5 81 84 84 84.5 83.5 84.5 86 72.5 90
Tone Max SPL 102 98 104.5 106.5 103.5 106 104.5 103 102.5 107 102.5 103.5 102.5 106.5 103.5 101 104 104 104.5 108.5 104.5 106 92.5
NB Max SPL 97 93 99.5 101.5 98.5 101 99.5 98 97.5 102 97.5 98.5 97.5 101.5 98.5 96 94 94 99.5 98.5 99.5 96 87.5 100
¹The Binaural to Monaural correction on +2dB come from ANSI S3.6 -2004 The difference between 0° - 45° - 90° come from ISO 8253-2 1998. The maximum free field levels depend on the amplifier, speaker and the acoustic conditions of the room. The actual maximum levels are found using the Custom Max function in the calibration software.
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 Speech Speech Noise ANSI S3.6-2010 RETSPL Linear Type A Equ. FF Type A-E Not Linear¹ Speech WN
ANSI S3.6-2010
MaxHL
19.5 15.5 7.0
ANSI Ear 3A Coupler: ANSI S3.7-1995 (HA-2 with 5mm rigid Tube) Speech Audiometer Speech Speech Noise
RETSPL
110 105 120
MaxHL
19.5 15.5 7.0 22.0
ANSI S3.6-2010
100 100 115 95
Speech Speech WN
ANSI HDA 280 Coupler: ANSI S3.7-1995 (NBS-9A) / IEC 60318-3 1998 (6ccm) Speech Audiometer Speech Speech Noise RETSPL Linear Type A Equ. FF Type A-E Not Linear¹ Speech WN
MaxHL
20.0 21.5 7.5
RETSPL
100 95 120
95 90 120 95
ANSI S3.6-2010
Speech Speech WN
ANSI S3.6-2010
RETSPL
MaxHL
18.5 18.5 6.0
110 100 120
18.5 18.5 6.0 21.0
100 100 115 95
Linear Type A Equ. FF Type A-E Not Linear¹ Speech WN
110
12.5 15.0
100 95
ANSI S3.6-2010
12.5
RETSPL
MaxHL
12.5 15.0
100 95
110
ANSI S3.6-2010
ANSI S3.6-2010
RETSPL MaxHL Speech Speech WN
12.5
RETSPL
MaxHL
12.5 15.0
100 95
100
ANSI B71 Coupler: ANSI S3.13-1987 (R2002) Speech Audiometer Speech Speech Noise
ANSI S3.6-2010
MaxHL
12.5
ANSI CIR 22/CIR33 Coupler: ANSI S3.7-1995 (HA-2) Speech Audiometer Speech Speech Noise
ANSI DD45 Coupler: ANSI S3.7-1995 (NBS-9A) / IEC 60318-3 1998 (6ccm) Speech Audiometer Speech Speech Noise ANSI S3.6-2010
MaxHL
ANSI S3.6-2010
RETSPL MaxHL RETSPL MaxHL 19.0 90 19.0 85 18.5 85 18.5 80 5.5 110 5.5 105 21.5 90
RETSPL
RETSPL
RETSPL MaxHL
ANSI HDA 200 Coupler: IEC60318-2 with type 1 adaptor Speech Audiometer Speech Speech Noise Frequency Linear Type A Equ. FF Type A-E Not Linear¹ Speech WN
MaxHL
ANSI Ear 5A Coupler: IEC 60318-5 2006 Speech Audiometer Speech Speech Noise
MaxHL
20.0 21.5 7.5 22.5
ANSI S3.6-2010
RETSPL
ANSI S3.6-2010
ANSI S3.6-2010
RETSPL MaxHL Speech Speech WN
55.0
RETSPL
MaxHL
55.0 57.5
50 55
60
¹ This value come from pure tone 1kHz RETSPL value. (Not linear describe there is no equalizing of the signal flat electrical response) ANSI
Free Field
ANSI S3.6-2010
Binaural
Speech Speech Noise Speech WN
Free Field max SPL Free Field max HL is found by subtracting the selected RETSPL value Free Field Power Free Field Line
Monaural
0°
45°
90°
0°
45°
90°
RETSPL
RETSPL
RETSPL
RETSPL
RETSPL
RETSPL
0° - 45° - 90° Max SPL
0° - 45° - 90° Max SPL
15.0 15.0 17.5
11.0 11.0 13.5
9.5 9.5 12.0
17.0 17.0 19.5
13.0 13.0 15.5
11.5 11.5 14.0
90 85 87.5
100 100 97.5
AC40 Service Manual
Page 11
IEC Speech Calibration IEC TDH39 Coupler IEC 60318-3 1998 (6ccm) Speech Audiometer Speech Speech Noise
IEC Ear 3A Coupler IEC 60318-5 2006 Speech Audiometer Speech Speech Noise
IEC60645-2 1997
IEC60645-2 1997
RETSPL
MaxHL
RETSPL
MaxHL
IEC60645-2 1997
IEC60645-2 1997
20.0 0.5 7.0
110 120 120
20.0 0.5 7.0 22.5
100 115 115 95
RETSPL MaxHL
RETSPL
MaxHL
20.0 22.5
90 85
Linear Type A Equ. FF Type A-E Not Linear¹ Speech WN
Speech Speech WN
IEC HDA 280 Coupler IEC 60318-3 1998 (6ccm) Speech Audiometer Speech Speech Noise IEC60645-2 1997
IEC60645-2 1997
RETSPL
MaxHL
RETSPL
MaxHL
20.0 6.5 7.5
100 110 120
20.0 6.5 7.5 22.5
95 105 120 95
Linear Type A Equ. FF Type A-E Not Linear¹ Speech WN
IEC60645-2 1997
IEC60645-2 1997 RETSPL
Linear Type A Equ. FF Type A-E Not Linear¹ Speech WN
20.0 3.5 6.0
110 115 120
20.0 3.5 6.0 22.5
MaxHL
20.0 22.5
90 85
20.0
100
IEC60645-2 1997
IEC60645-2 1997
RETSPL MaxHL
RETSPL
MaxHL
20.0 22.5
90 85
Speech Speech WN
IEC DD45 Coupler IEC 60318-3 1998 (6ccm) Speech Audiometer Speech Speech Noise MaxHL
IEC60645-2 1997 RETSPL
IEC CIR 22/CIR33 Coupler IEC 60318-5 2006 Speech Audiometer Speech Speech Noise
IEC60645-2 1997
IEC60645-2 1997
IEC60645-2 1997 RETSPL MaxHL Speech Speech WN
RETSPL MaxHL RETSPL MaxHL 20.0 90 20.0 85 3.5 100 3.5 95 5.5 110 5.5 105 22.5 90
RETSPL
100
IEC Ear 5A Coupler IEC 60318-5 2006 Speech Audiometer Speech Speech Noise
IEC HDA 200 Coupler IEC60318-1 with type 1 adaptor Speech Audiometer Speech Speech Noise Frequency Linear Type A Equ. FF Type A-E Not Linear¹ Speech WN
20.0
20.0
90
IEC B71 Coupler 60318-6 2007 Speech Audiometer Speech Speech Noise
MaxHL
IEC60645-2 1997
IEC60645-2 1997
100 115 115 95
RETSPL MaxHL
RETSPL
MaxHL
55.0 57.5
50 55
Speech Speech WN
55.0
60
¹ This value come from pure tone 1kHz RETSPL value. (Not linear describe there is no equalizing of the signal flat electrical response) IEC Free Field ISO 389-7 2005
Binaural
Speech Speech Noise Speech WN
Free Field max SPL Free Field max HL is found by subtracting the selected RETSPL value Free Field Power Free Field Line
Monaural
0°
45°
90°
0°
45°
90°
0° - 45° - 90°
0° - 45° - 90°
RETSPL
RETSPL
RETSPL
RETSPL
RETSPL
RETSPL
Max SPL
Max SPL
0.0 0.0 2.5
-4.0 -4.0 -1.5
-5.5 -5.5 -3.0
2.0 2.0 4.5
-2.0 -2.0 0.5
-3.5 -3.5 -0.5
90 85 87.5
100 100 97.5
AC40 Service Manual
Page 12 Swedish Speech calibration Speech WN
SWEDEN TDH39 Coupler IEC 60318-3 1998 (6ccm) Speech Audiometer Speech Speech Noise STAF 1996 MaxHL
RETSPL
MaxHL
22.0 0.5 22.0
108 120 105
27.0 0.5 27.0 22.5
93 115 95 95
Linear Type A Equ. FF Type A-E Not Linear Speech WN
STAF 1996
IEC60645-2 1997
IEC60645-2 1997
MaxHL
RETSPL
MaxHL
20.0 6.5 7.5
100 110 120
20.0 6.5 7.5 22.5
95 105 120 95
Linear Type A Equ. FF Type A-E Not Linear Speech WN
Speech Speech WN
Frequency Linear Type A Equ. FF Type A-E Not Linear Speech WN
21.0
STAF 1996 Speech Speech WN
21.0
84 85
99
RETSPL
MaxHL
26.0 22.5
84 85
SWEDEN CIR 22/CIR33 Coupler IEC 60318-5 2006 Speech Audiometer Speech Speech Noise STAF 1996
IEC60645-2 1997
STAF 1996
RETSPL MaxHL Speech Speech WN
21.0
89
RETSPL
MaxHL
26.0 22.5
84 85
SWEDEN B71 Coupler 60318-6 2007 Speech Audiometer Speech Speech Noise
SWEDEN DD45 Coupler IEC 60318-3 1998 (6ccm) Speech Audiometer Speech Speech Noise STAF 1996
RETSPL
MaxHL
RETSPL
MaxHL
22.0 3.5 22.0
108 115 104
27.0 3.5 27.0
93 115 94
Linear Type A Equ. FF Type A-E Not Linear
MaxHL
26.0 22.5
STAF 1996
RETSPL MaxHL
RETSPL MaxHL RETSPL MaxHL 20.0 90 20.0 85 3.5 100 3.5 95 5.5 110 5.5 105 22.5 90
STAF 1996
99
RETSPL
SWEDEN EAR 5A Coupler IEC 60318-5 2006 Speech Audiometer Speech Speech Noise
SWEDEN HDA 200 Coupler IEC60318-1 with type 1 adaptor Speech Audiometer Speech Speech Noise IEC60645-2 1997
STAF 1996
RETSPL MaxHL
SWEDEN HDA 280 Coupler IEC 60318-3 1998 (6ccm) Speech Audiometer Speech Speech Noise RETSPL
IEC60645-2 1997
IEC60645-2 1997
RETSPL MaxHL
RETSPL
MaxHL
55.0 57.5
50 55
Speech Speech WN
55.0
60
Sweden Free Field ISO 389-7 2005
Binaural
Speech Speech Noise Speech WN
95
SWEDEN EAR 3A Coupler IEC 60318-5 2006 Speech Audiometer Speech Speech Noise
STAF 1996
RETSPL
22.5
Free Field max SPL Free Field max HL is found by subtracting the selected RETSPL value Free Field Power Free Field Line
Monaural
0°
45°
90°
0°
45°
90°
0° - 45° - 90°
0° - 45° - 90°
RETSPL
RETSPL
RETSPL
RETSPL
RETSPL
RETSPL
Max SPL
Max SPL
0.0 0.0 2.5
-4.0 -4.0 -1.5
-5.5 -5.5 -3.0
2.0 2.0 4.5
-2.0 -2.0 0.5
-3.5 -3.5 -0.5
90 85 87.5
100 100 97.5
AC40 Service Manual
Page 13 Norwegian Speech Calibration Not Linear Speech WN
Norway TDH39 Coupler IEC 60318-3 1998 (6ccm) Speech Audiometer Speech Speech Noise Norway MaxHL
RETSPL
MaxHL
40.0 0.5 7.0
90 120 120
40.0 0.5 7.0 22.5
80 115 115 95
Linear Type A Equ. FF Type A-E Not Linear Speech WN
Norway Speech Speech WN
Norway
MaxHL
RETSPL
MaxHL
40.0 6.5 7.5
80 110 120
40.0 6.5 7.5 22.5
75 105 120 95
Frequency Linear Type A Equ. FF Type A-E Not Linear Speech WN
40.0
Norway Speech Speech WN
40.0
MaxHL
40.0 22.5
70 85
Norway 80
Norway
RETSPL
MaxHL
40.0 22.5
70 85
Norway
RETSPL MaxHL Speech Speech WN
RETSPL MaxHL RETSPL MaxHL 40.0 70 40.0 65 3.5 100 3.5 95 5.5 110 5.5 105 22.5 90
40.0
70
RETSPL
MaxHL
40.0 22.5
70 85
Norway B71 Coupler 60318-6 2007 Speech Audiometer Speech Speech Noise
Norway DD45 Coupler IEC 60318-3 1998 (6ccm) Speech Audiometer Speech Speech Noise
Norway
Norway
RETSPL MaxHL Speech Speech WN
Norway
RETSPL
MaxHL
RETSPL
MaxHL
40.0 3.5
90 115
40.0 3.5
80 115
Linear Type A Equ. FF Type A-E
RETSPL
Norway CIR 22/CIR33 Coupler IEC 60318-5 2006 Speech Audiometer Speech Speech Noise
Norway
Norway
80
RETSPL MaxHL
Norway HDA 200 Coupler IEC60318-1 with type 1 adaptor Speech Audiometer Speech Speech Noise Norway
75.0
40
RETSPL
MaxHL
75.0 57.5
30 55
Norway Free Field ISO 389-7 2005
Binaural
Speech Speech Noise Speech WN
115 95
Norway EAR 5A Coupler IEC 60318-5 2006 Speech Audiometer Speech Speech Noise
RETSPL Linear Type A Equ. FF Type A-E Not Linear Speech WN
6.0 22.5
Norway
RETSPL MaxHL
Norway HDA 280 Coupler IEC 60318-3 1998 (6ccm) Speech Audiometer Speech Speech Noise Norway
120
Norway EAR 3A Coupler IEC 60318-5 2006 Speech Audiometer Speech Speech Noise
Norway
RETSPL
6.0
Free Field max SPL Free Field max HL is found by subtracting the selected RETSPL value Free Field Power Free Field Line
Monaural
0°
45°
90°
0°
45°
90°
0° - 45° - 90°
0° - 45° - 90°
RETSPL
RETSPL
RETSPL
RETSPL
RETSPL
RETSPL
Max SPL
Max SPL
0.0 0.0 2.5
-4.0 -4.0 -1.5
-5.5 -5.5 -3.0
2.0 2.0 4.5
-2.0 -2.0 0.5
-3.5 -3.5 -0.5
90 85 87.5
100 100 97.5
AC40 Service Manual
Page 14
Equivalent free field Equivalent Free Field
TDH39
Speech Audiometer HDA200 HDA280
DD45
IEC60645-2 1997 ANSI S3.6-2010 IEC60318-3 1998
ISO389-8 2004
PTB
IEC60318-1
IEC60318-3 1998
GF-GC -17,5 -14,5 -12,0 -9,5 -6,5 -3,5 -5,0 0,0
GF-GC -5,0 -4,5 -4,5 -4,5 -5,0 -5,5 -2,5 -2,5
GF-GC -15,0 -14,0 -12,5 -11,5 -10,0 -9,0 -8,0 -8,5 -5,0
GF-GC -21.5 -17.5 -14.5 -12.0 -9.5 -7.0 -7.0 -6.5
800 1000 1250 1500
-0,5 -0,5 -1,0
-3,0 -3,5 -2,0
-4,5 -6,5 -11,5 -12,5
-4.0 -3.5 -3.5
1600 2000 2500 3000
-4,0 -6,0 -7,0
-5,5 -5,0 -6,0
-12,5 -9,5 -7 -10,5
-7.0 -7.0 -9.5
3150 4000 5000 6000
-10,5 -10,5 -11,0
-7,0 -13,0 -14,5
-10,0 -14,5 -12,5 -14,5
-12.0 -8.0 -8.5
6300 8000
-10,5 +1,5
-11,0 -8,5
-15,5 -9,0
-9.0 -1.5
Frequency 125 160 200 250 315 400 500 630 750
PTB – DTU 2010
General properties for earphones
Frequenc y [Hz] 125 160 200 250 315 400 500 630 750 800 1000 1250 1500 1600 2000 2500 3000 3150 4000 5000 6000 6300 8000
Sound attenuation values for earphones Attenuation TDH39/DD45 with MX41/ EAR-Tone 3A AR or PN 51 cushion EAR-Tone 5A [dB] [dB] 3 33,5 4 5 5 34,5 5 6 7 34,5 9 11 15 35,0 18 21 26 33,0 28 31 32 39,5 29 26 24 43,5
HDA200 [dB] 14,5
16
22,5
28,5
32
45,5
44
AC40 Service Manual
Page 15
Calibration properties Calibrated Transducers:
Accuracies:
Telephonics TDH39 with a static force of 4.5N 0.5N Interacoustics DD45 with a static force of 4.5N 0.5N Sennheiser HDA200 with a static force of 10N1.0N Sennheiser HDA280 with a static force of 4.5N 0.5N Bone conductor: Radioear B71 with a static force of 5.4N 0.5N Insert phones: EAR Tone 3A (Option) EAR Tone 5A (Option) Generally the instrument is made and calibrated to be within and better than the tolerances required in the specified audiometer standards: Frequency: 0.1% Pure tone levels: 3 dB for 125 – 4000Hz 5 dB for 6000 – 8000Hz Speech frequency response : -0/-10 dB at 125 – 249 Hz 3 dB at 250 – 4000 Hz 5 dB at 4001 – 6300 Hz Earphones:
Tone calibration standards and spectral properties: Earphones
Pure tone: Narrow band noise:
Mean value of PTB report 1.61-4039503/09 and DTU report 27 October 2009 for DD45 ISO 389-1 1998 / ANSI S3.6-2010 for TDH39. Pure Tone + ISO 389-4 1994 values / ANSI S3.6-2010
Bone conductor Insert phones
Spectral properties: IEC 60645-1 2012/ / ANSI S3.6-2010, Narrow band noise White noise: SPL Spectral properties: IEC 60645-1 2012, White noise Pure tone: ISO 389-3 1994 / ANSI S3.6.- 2010 Valid for placement on the human mastoid Pure tone: ISO 389-2 1994/ ANSI S3.6-2010 Narrow band noise: ISO 389-2 1994 + ISO 389-4 1994 values / ANSI S3.6-2010
Spectral properties: IEC 60645-1 2012, ANSI S3.6-2010 Narrow band noise, electrically measured. White noise: SPL
Free field output (calibrated on location)
Spectral properties: Pure tone: Narrow Band noise: Spectral properties: White noise:
IEC 60645-1 2012, White noise, electrically measured. ISO 389-7 2005 + ISO8253-2 1992/ ANSI S3.6-2010 Free field ISO 389-7 2005 + ISO8253-2 1992/ ANSI S3.6-2010 IEC 60645-1 2012 / ANSI S3.6-2010, Narrow band noise SPL
Spectral properties: IEC 60645-1 2012, White noise 80-20000Hz measured with constant bandwidth 80-20000Hz measured with 1/3 octave filtering
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 For DD45/TDH39 headsets
8010894
DD51 cushion For DD45/TDH39 headsets
8010822
Earphone cable IEC-M21 symmetric mono For DD45/TDH39 headsets
8010815
Eartone 3A 10 Ohm Insert Earphones
8000713
Replacement cable Earphone 3A 10ohm
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 DD45AA Audiometric Headset with Amplivox Audiocups
8010901 8010794
TDH39 Audiometric Headset
8010953
DD45 Audiometric headset
8010872
Headset HDA280 complete
8010870
Monitor Headset with boom PC-131 stereo headset
8010800
B71 Bone Conductor 30 plug
8011094
IEC-B11 Conductor cable
8011096
B71 Bone Conductor
8011098
P3333 Headband for B71
8001705
Accessory box For B71 Bone conductor
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
Mainscable E/F
8011391 up to8011397 8011402 8011406
Mains cables Country specific
8012959
Cleaning cloth
Mains cable Brazil Mains cable Japan
AC40 Service Manual
Page 19
Consumables and Parts Consumables Item
# IA Item Number
Description
8011371
Pen set and AF12 audiogram chart kit
# IA Item Number
Description
Parts Item
PCA Main board 1060 For exchange contact Interacoustics
PCA Key board 1060 For exchange contact Interacoustics 8006375
PCA Back Board 1060
8006376
PCA Side Board 1060
8006284
PCA Encoder PCB 1058/1059/...
8009262
Connection PCB 2062
8100308
Micro Secure Digital Card 4GB microSD MLC
8010604
Display LCD 170.4x127.8 color TFY-LCD
8001604
Glass cover display 1060
Display cable For exchange contact Interacoustics 8004158
Ribbon cable 380mm 40pins pitch 0.5mm FFC
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
8002608
Cover Front 1060
8002521
Button rotary 1059
8102492
Cover upper 1059/1060
8001567
Impeller rotary button 1059
8003677
Bearing Ø17xØ30x2
AC40 Service Manual
Page 21
Schematics Block Diagram Phone 1/2 Output Att . +20-100 dB
Fix Att. 0-25 dB
Ext . Ranges +20 dB
Output DAC Ch 1
Fix Att. Ch1
+20dB Ch 1
Output Ch 1
Talk Forward Mic 1 Ext Input switch Ch1
Talk Forward Mic 1 Int
Input Att . +30-100 dB
Input Ch 1
Phone 1 L
Left Mute Mute Ch 1
Output switch Ch1
Phone 1 R
Phone 1/2 – Insert / HF
Phone 2 R Phone - HF L
Input DAC Ch 1
Insert L
Output Sw Ch 1 Input Sw Ch 1
Mic 2
Input switch Ch2
CD 1 CD
Output Att . +20-100 dB
Output Ch 2 Input Att . +30-100 dB
Fix Att. 0-25 dB
Input Ch 2 Output DAC Ch 2
Fix Att. Ch2
Ext . Ranges +20 dB +20dB Ch 2
Right Mute
Mute Ch 2
Output Sw Ch 2 Input Sw Ch 2
Talk Back Mic
Input switch Ch3
Output Att . +20-100 dB
Fix Att. 0-25 dB
Ext . Ranges +20 dB
Mute
Output DAC Ch 3
Fix Att. Ch3
+20dB Ch 3
Mute Ch 3
Output Att . +20-100 dB
Fix Att. 0-25 dB
Ext . Ranges +20 dB
Mute
Output DAC Ch 4
Fix Att. Ch4
+20dB Ch 4
Mute Ch 4
Output Ch 3 Input Ch 3
Input Att . +30-100 dB
TDM codec
Output switch Ch3
Output Ch 4
Input Sw Ch 3
Output Ch 5 Input Att . +30-100 dB
Input Ch 4 Output Ch 6 Monitor Ch1
Input DAC Ch 4
Input Ch 1 Input Ch 2 Input Ch 3 Input Ch 4
Master Volume
Output switch Ch4
Stereo Monitor Headset
FLag 20 FLag 21 FLag 22
Input Ch 4 Input Ch 4 Input Ch 4 Input Ch 4
Real time clock
Reset
CPU SPI in
Unik ID
CPU SPI CS
Stereo Assistent Headset
Display 600*800
SPI Key Led ctrl
Laptop -PC HDMI
DSP SPI CS
FF 1 Power
FF1 P
FF2 Line
FF2 20W
FF 2 Power
Keyboard
SPI Keyboard matrix / encoders
FF3 20W FF3-4
FF3 Line FF4 Line
FF4 Line
FF 3 Power
FF3 P FF4 20W
FF 4 Power
FF4 P Reset
Input Ch 1-2 select
Fix Att. Ch1-2 code
Output Ch 1-2 code
Mute Ch 1-2 FF1-2 Line
Input Ch 3-4 Select
Fix Att Ch3-4 Code
Output Ch 3-4 Code
Mute Ch 3-4 FF3-4 Line
Mon Input
FF3-4 Pwr
Mon Ass Ch1/Ch2
Option
SPI Row 2
SPI DAC 1
HDMI DDR Ram
FF1 20W
FF1 Line
SPI Row 1
SPI Codec
LVDS
SD card Socket
B71
off Master Volume
+
SPI Codec
SPI Flash
LAN
Flash
Bone 2
+
USB Host
USB Device
Bone 2
Phone - HF 2*Mono HDA200
FF3 Line
Output Sw Ch 4 Monitor LSP 1
SPI Row 0
CPU
B71
FF2 Line
Monitor LSP 2
FLag 20 FLag 21 FLag 22
USB Host 4
Bone 1
FF1 Line
+
+
SPI
HUB
IRQ DSP
Ext . Mouse USB Host 1
IRQ CPU
Pat. R. Pat . R. 2 1
Ext. Keyboard
Bone 1
FF1-2
Monitor Ch2
DSP
Insert Masking
FF2 P
TDM Serial
Input Sw Ch 4
SD RAM
Phone – HF R
Ins M
Insert 2*Mono EAR 3A EAR 5A
Input DAC Ch 3 Output Sw Ch 3
Input switch Ch4
Insert R Insert / HF
Output switch Ch2
Input DAC Ch 2
CD 2
Input 110-240V Power supply
Phone 2* Mono TDH39 TDH 50 DD 45
Phone 2 L
8 channel DAC
Att. Ch1 Output DAC Att. Ch2 Output DAC Att. Ch3 Output DAC Att. Ch4 Output DAC Att . Ch2 Intput DAC Att. Ch1 Intput DAC Att . Ch3 Intput DAC Att . Ch4 Intput DAC Project Name Document Name Author Current revision Revision date File Location
5V 0.5A Ext . FF Ctrl AC40 block diagram AC40 BlockDiagram Ib Pedersen 2.0 08-06-2012 D-0100718
Ext. Power FF. Control Ext. FF
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 4 pcs
4 pcs
2 pcs
2 pcs
6 pcs 4 pcs
After removing the screws the top and bottom part can be divided
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
5 pcs.
4 pcs
Cable lock
AC40 Service Manual
Page 24
Remove the Power Supply Remove 4x M3x5 screws from the cabinet bottom
37
Remove the cable tiess and disconnect the connection cable
Disconnect power and ground cable
AC40 Service Manual
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
38
Remove the display glass and the display gasket
Remove 4xM3x5mm screws – disconnect the display cable
For change of the display cable contact Interacoustics
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’”. Continue with this test, if the square moves before the knob completes one “full click”.
Hold on to the knob and loosen the nut a little bit.
Hold on to the knob and carefully tighten the encoder, as shown. Tighten clockwise
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.
Turn the knob clockwise and anti-clockwise, to see if the knob is correctly adjusted. If not, adjust it again! Remember! The square should ONLY move after each “full click”/when ”it feels like the knob ’clicks’ ”.
Continue with this test, if the square moves before the knob completes one “full click”.
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. NOTE It is considered good practice to perform annual checks of the audiometric test room’s noise level as part of annual calibration using the applicable table per ANSI/ASA S3.1 American National Standard Maximum Permissible Ambient Noise Levels for Audiometric Test Rooms to ensure that audiometer performance will not be affected by any changes in the audiometric test room’s noise levels.
Annual calibration (IEC 60645-1) A basic calibration shall be performed by a competent laboratory. The procedure shall be such that, after the audiometric equipment has been submitted for a basic calibration, it shall meet the relevant requirements given in IEC 60645-1. When the instrument is returned after basic calibration, it should be checked in accordance with procedures outlined in 12.3 or 12.4 before being put back into service. It is recommended that a calibration check label be attached to the equipment, giving the date on which the next calibration is due.
Equipment needed to perform audiometer calibrations 1. Type 1 sound level meter – Octave band filter set (1/3 octave, range of minimum 125 Hz to 16000 Hz) must meet Type 1 sound level meter (ANSI S1.4). Sound level meters to be checked before use with a calibrator. 2. Mechanical Coupler (used for bone conduction calibration) – B&K 4930 Artificial Mastoid – or other mechanical coupler. Must meet ANSI S3.13. 3. System to measure: Frequency Rise time Fall time Duration Over shoot THD (Total Harmonic Distortion) 4. Piston phone or sound level meter calibrator. Ear Simulator ANSI/ASA S3.7 or IEC 60318-1, Part 1: Electroacoustics - Simulators of human head and ear - Part 1: Ear simulator for the measurement of supra-aural and circumaural earphones Acoustic Coupler – NBS–9A (6cc) ANSI/ASA S3.7, or IEC 60318-3, Part 3: Electroacoustics – Simulators of human head and ear – Part 3: Acoustic coupler for the calibration of supra-aural earphones used in audiometry. IEC 60318-5, Electroacoustics – Simulators of human head and ear – Part 5: 2 cm3 coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts IEC 60318-6, Electroacoustics – Simulators of human head and ear – Part 6: Mechanical coupler for the measurement of bone vibrators 5. Specification / calibration information for all microphones, filters, SLM, and couplers showing correction values needed to be applied to maintain accuracy. 6. Other couplers and adapters as stated or specified by manufacturer of the audiometer. 7. Calibration reports/sheets that demonstrate the audiometer meets the requirements and records the measurement results of the calibration.
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Phasing of headphones Before headphone calibration of DD45/TDH39 take place the phase of the speakers must be checked. Phasing of the Headset 1. Start the audiometer in user mode 2. Select Left ,Tone, Rev. 125 Hz 70dBHL in channel 1. 3. Connect channel 1 of an oscilloscope to the socket on the left headphone ( set the trigger to channel 1). 4. Connect the Left earphone to Left output on the Audiometer and place it on the artificial ear, which again is connected to a sound level meter. 5. The sound level meter must be in the range 110 to 115dB. 6. Connect the channel 2 on the oscilloscope to the output of the sound level meter. 7. The oscilloscope must display both channels. 8. Looking at the oscilloscope, notice the phase difference between channel 1 and channel 2. 9. Exchange the Left earphone plug with the Right earphone plug. Replace Left earphone with Right earphone on the artificial ear 10. Connect channel 1 of the oscilloscope to the socket on the right speaker. 11. Looking at the oscilloscope, notice if the phase difference between channel 1 and channel 2 is the same as it was in point 8 12. If the phase difference is identical the headset is correct connected. 13. If not identical, the plug on the headphone must be turned 180 degrees. Make a new control to be sure that the oscilloscope picture is the same for point 8 and 11. Calibration of test equipment All test equipment used for the calibration of audiometers is to be calibrated annually. Calibration of all test equipment is to be performed by a laboratory which is traceable to the National Institute of Standards and 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.
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Checklist for calibration Functional checks Visual inspection, safety - Check power cord and accessory cords for signs of wear or damage and general physical condition of instrument. Headband – Tension. Cushions - Check condition; replace if needed. Patch cords - Check plugs and leads for intermittency. Patient response - Check for proper operation. Pure-tone electroacoustic measurements Frequency (Hz) - Actual measurement recorded (all frequencies). Distortion (%) - Recorded as a percentage of THD on all frequencies. Output levels (all transducers) - Recorded as a deviation from standard Linearity of all channels (all transducers) (dB) - Recorded as a deviation from standard. Rise/fall time (m/sec) - Actual measurement recorded. Overshoot (dB) - Actual measurement recorded. On/off ratio - Measured and recorded in dB down. Crosstalk - Measured and recorded in dB down. Pulse tones - Duration (m/sec) - Actual measurement recorded (pass/fail). SISI - Indicate pass or fail and deviation from standard. Unwanted noise check - Record with (pass/fail): Interrupter switch Switch sounds Mechanical sounds Masking measurements Narrow band noise output level - Measured and recorded as deviation from standard, all transducers. White noise output level - Measured and recorded as deviation from standard, all transducers. Speech electroacoustic measurements Speech output level - Signal applied to input, VU meter at zero Measured and recorded as deviation from standard, all transducers. Speech through external inputs - CD / tape / phono - VU meter at zero - Measured and recorded as deviation from standard all transducers. Distortion - Recorded as percentage of THD. Speech noise - Output measured and recorded as deviation from standard. Sound field measurements Warble/FM output level - Actual measurement recorded (all frequencies) as deviation from standard. Speech inputs in sound field output level - Signal applied to input, VU meter set at zero – Measured and recorded as deviation from standard. Narrow band noise output level - Measured and recorded as deviation from standard, all transducers. Speech/white noise output level - Measured and recorded as deviation from standard, all transducers. Distortion - Recorded as percentage of THD. Operation of instrument should be checked for normal function post calibration.
A /NA
Pass/Fail
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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. For correction of your 6cc or 2cc coupler/microphone you have to add or subtract from the 90dB SPL level which can be read on your sound level meter HL mode: If you select “HL” (hearing level) you can perform the calibration like on a regular audiometer where you add the standard to the HL values and then the corrections for your coupler/microphone.
Figure 1
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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:
Measuring amplifier
Acoustical IEC 60318-3 (IEC 303) coupler
Frequency counter
Correction values for coupler
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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)
Figure 4 Note: Remember to add or subtract the correction for your microphone Check the frequency accuracy with a frequency counter. The accuracy has to be better than ±1% Press “Next”, when the calibration level is obtained, to get the next frequency
AC40 Service Manual Repeat “Next” until all stimuli is calibrated, for both left and right transducer.
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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
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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:
Measuring amplifier
Acoustical IEC 60318-3 (IEC 303) coupler
Frequency counter
Correction values for coupler
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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)
Figure 8 Note: Remember to add or subtract the correction for your microphone Check the frequency accuracy with a frequency counter. The accuracy has to be better than ±1% 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.
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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
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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
Measuring amplifier
Acoustical IEC 60318-1 coupler
Frequency counter
Correction values for coupler
Spacer for HDA200 to coupler IEC 60318-1
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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)
Figure 12 Note: Remember to add or subtract the correction for your microphone Check the frequency accuracy with a frequency counter. The accuracy has to be better than ±1%
AC40 Service Manual 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.
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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
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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:
Measuring amplifier
Acoustical IEC IEC 60318-3 (IEC 303) coupler
Frequency counter
Correction values for coupler
Spacer for HDA280 to coupler IEC 60318-3 (IEC 303)
30° adaptor cable
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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)
Figure 16 Note: Remember to add or subtract the correction for your microphone Check the frequency accuracy with a frequency counter. The 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
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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
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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:
Measuring amplifier
Acoustical IEC 60318-5 (IEC126) coupler
Frequency counter
Correction values for coupler
30° adaptor cable
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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)
Figure 20 Note: Remember to add or subtract the correction for your microphone Check the frequency accuracy with a frequency counter. The accuracy has to be better than ±1%
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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” A dialog box will appear with the message “Calibration data successfully written to hardware”
Figure 21
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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:
Measuring amplifier
Acoustical IEC 60318-5 (IEC126) coupler
Frequency counter
Correction values for coupler
30° adaptor cable
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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)
Figure 24 Note: Remember to add or subtract the correction for your microphone Check the frequency accuracy with a frequency counter. The accuracy has to better than ±1%
AC40 Service Manual 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.
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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
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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
Frequency counter
Correction values for coupler
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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)
Figure 28 Note: Remember to add or subtract the correction for your microphone Check the frequency accuracy with a frequency counter. The accuracy has to be better than ±1% Press “Next”, when the calibration level is obtained, to get the next frequency Repeat “Next” until all stimuli is calibrated.
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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
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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
Frequency counter
Correction values for Mastoid
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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. The accuracy has to be better than ±1% Press “Next”, when the calibration level is obtained, to get the next frequency Repeat “Next” until all stimuli is calibrated.
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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
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Calibration procedure Free Field and Custom Max Select standard: ANSI / IEC (Figure 34)
Figure 34
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Select Free field setup Free Field Setup. Speaker output.
Figure 35
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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. values) has to be unchecked.
Figure 36 Select speaker.(Figure 37) Select frequencies 1. Adjust slider until speaker is distorting or the slider is at the highest. 2. Notices max output level on the Sound level meter (SLM). 3. Type value from the SLM. Select next freq.
2
1
3
Figure 37
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Transducer calibration Calibrate left and right speaker.
Figure 38
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Update procedure - Firmware New firmware will be available on the Interacoustics web site and the firmware is packaged in a zip archive. After archiving the firmware follow the instructions below. 1. 2. 3. 4. 5. 6.
Unzip the firmware archive on a new FAT32 formatted USB stick. Insert the USB in the unpowered AC40 instrument. Turn on the instrument and wait for the Tone test. Enter “Common Setting” using the Setup/Tests Button. Press the function key named “Install”, and follow the instructions on the instrument display. Wait for the instrument to return to the Tone test.
WARNING: The instrument will restart several times. WARNING: Don’t turn off the instrument while updating.
Installing MHA (Master Hearing Aid) wave files: MHA/HIS wave files can be installed the following way: 1. Zip the selected wave files into a file named “update_mha.mywavefiles.bin” (make sure the file extension is bin and not zip) 2. Copy the files to a newly FAT32 formated USB memory stick 3. Insert the stick into one of the USB connections on the AC40. 4. Go to Common Setup and press “Install” 5. Wait for the installation to complete. 6. Restart the AC40.
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). 1. Open up the “Paint” program 2. Open up “Image Properties”, by pushing the Ctrl + E keys
3. 4. 5. 6.
Set the “Width” to 945 and the “Height” to 190 as shown. Click on “OK” Edit the Image and the Company data to fit inside the set area Save the created file as “PrintLogo.bmp” Zip the “PrintLogo.bmp” file to the following name “update_user.logo.bin” The “update_user.logo.bin” file is now ready to be used 7. Find a USB thumb drive with at least 32MB in total size and insert it into your PC 8. Go to My Computer and right click on the USB thumb drive and select ‘Format’ **Note-this will erase
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everything on your USB thumb drive* 9. Ensure that ‘FAT32 is selected as your File System- Leave other settings as listed
10. 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 11. Copy “update_user.logo.bin” file onto the formatted thumbdrive 12. It is very important that this file and only this file is present on the USB thumb drive 13. With the audiometer turned off insert the thumb drive into any available USB port 14. Turn on the instrument and push the Temp/Setup Button from the Tone test screen 15. Enter “Common Settings” using the Setup/Tests Button 16. For the question “Do you want to install” press the “Yes” button 17. After installation is completed, press the “Back” button to get to the testing screen
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AC40 Service Manual Appendix A
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Appendix A Update News Following modifications are made for manual version 8100837 Rev 2 instruments from 10/2013 Minor visual changes to manual format
