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Summary of Contents for Welch Allyn AM 232
- Page 1 AM 232 Manual Audiometer Operating Instruction Manual Part Number 1717-0101 - Rev. 05 12-16-08...
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Page 2: Electromagnetic Compatibility (Emc)
Electromagnetic compatibility (EMC) CE Mark per Medical Device Directive (93/42/EEC) 12-16-08... -
Page 3: Table Of Contents
Table of contents Electromagnetic compatibility (EMC) Table of contents Service and repair Recalibration Warranty Rechargeable battery warranty Safety notes Specifications Standards Chapter 1 Introduction Unpacking and inspection Accessories supplied Connectors, Controls, Indicators Front panel controls and indicators (see Figure 1) Rear panel connectors and indicators (see Figure 2) Installation Pretest procedure... - Page 4 Chapter 3 Operation Preliminary check Instructing the subject Placing the earphones Response handswitch Audiogram form Routine calibration check Routine test administration HL control (F3) Range Extension pushbutton (F2) Tone Type Selector (F9) Typical testing session Pretest Review Familiarization Determining the threshold (Pure Tone) Testing procedure Chapter 4 Routine Maintenance...
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Page 5: Service And Repair
Note: Return of the instrument registration card is required for proof of purchase and warranty validation. Welch Allyn, Inc. warrants the AM 232 Manual Audiometer to be free of original defects in material and workmanship and to perform in accordance with manufacturer’s specifications for a period of one year from the date of purchase. -
Page 6: Safety Notes
Injury to personnel or damage to equipment can result when a three-prong or two-prong adapter is connected be- tween the AM 232 Manual Audiometer power plug and an AC outlet or extension cord. Additionally, the AM 232 Manual Audiometer is equipped with a specific power transformer which should not be interchanged with any other transformer or supply. -
Page 7: Specifications
Specifications Standards The AM 232 Manual Audiometer meets ANSI S3.6 and IEC 645 Type 4 Audiometer Standards. UL 60601-1 Medical Electrical Equipment Requirements for Safety IEC/EN 60601-1 General Requirements CSA C22.2 No.601-1-M90 Protective Classification This system is intended for continuous operation and has a protective classification of Class II, Type B. - Page 8 Replacement NiCad Battery Only 72320 Battery Pack Assembly 72329 Battery Pack includes Welch Allyn supplied NiCad battery. May also be used with six (6), Size C, Alkaline batteries (not included) Replacement NiCad Catalog Listings AM 232 Manual Audiometer, AC Power (USA)
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Page 9: Introduction
The AM 232 Manual Audiometer is a precisely designed and calibrated instrument. With proper care it will deliver accurate sound-pressure levels to subject ears for your hearing screening program. Note: The AM 232 Manual Audiometer should be recalibrated yearly (or sooner if a problem develops). See Chapter 4. 12-16-08... -
Page 10: Unpacking And Inspection
Notify your carrier if any damage is noted. Carefully remove your AM 232 Manual Audiometer from its shipping container. If the instrument appears to have suffered mechanical damage, notify the carrier immediately so that a proper claim can be made. -
Page 11: Connectors, Controls, Indicators
Connectors, Controls, Indicators Figure 1: Front panel. Front panel controls and indicators (see Figure 1) F1 - Power switch and indicator for ON and OFF . F2 - Range extension pushbutton allows you to increase the stimulus intensity 10 dB above the standard maximum HL at any frequency. -
Page 12: Rear Panel Connectors And Indicators (See Figure 2)
Rear panel connectors and indicators (see Figure 2) Figure 2: Rear panel. R1 - Power input jack (5-pin DIN Connector) with front panel illustration showing its location and a rear panel label giving the input power specifications. R2 - Attention, consult accompanying document for instructions or warnings pertaining to these parts. - Page 13 Note: There is a symbol on the bottom panel (marked B1 in Figure 3) that indicates entry by qualified service personnel only. Figure 3 : Bottom panel. 12-16-08...
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Page 14: Installation
Installation 1. Plug the power cord into the appropriate jack (R1) on the back panel of the instrument. 2. Plug the other end into a line power (mains) outlet. 3. Plug the earphones into the earphone jacks (R3) on the rear panel. Note the symbol along the top of the front panel, which indicates which is right (RED) and which is left (BLUE). -
Page 15: Pretest Procedure
Pretest procedure Note: The AM 232 is a versatile audiometer designed for use in doctor offices, schools, industrial settings, the military, etc. The generic term “subject” used in this manual is used to identify the person whose hearing is being evaluated. -
Page 16: Elimination Of Ambient Noise
Also, Audiocups are available from Welch Allyn as an optional accessory. If the test subject is in the same room as the audiometer, it is recommended that the subject be seated about 1 meter (-3 ft) away from the instrument. -
Page 17: Disposal Of Non-Contaminated Electrical And Electronic Equipment Directive 2002-96-Ec-Weee
(RAEE). Si este producto está contaminado, no se aplica esta directiva. Para obtener información más específica sobre los desechos, consulte www.welchallyn.com/weee o póngase en contacto con el servicio de atención al cliente de Welch Allyn llamando al +34 91 7499357. Eesti keeles Ärge vabanege antud tootest kui sorteerimata olmejäätmest. - Page 18 Europaparlamentets och rådets direktiv 2002/96/EG om avfall som utgörs av eller innehåller elektriska eller elektroniska produkter (WEEE). Om denna produkt är kontaminerad gäller inte detta direktiv. Gå in på www.welchallyn.com/weee eller kontakta kundtjänsten hos Welch Allyn på +46 42330220 för mer information om kassering.
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Page 19: Battery Option
Chapter 2 Battery Option This chapter describes the battery option of the AM 232 Manual Audiometer. It pertains only to those customers who purchased Models #23210 or #23215 with the battery pack installed or to those who later purchased the #72329 Battery Pack Assembly. -
Page 20: Nicad Battery Operation
Note: In no instance will loss of battery power affect the instrument calibration. To save battery life, the AM 232 Manual Audiometer has a special “Sleep Mode” in which the instrument will shut down after 5 minutes of no operation. You will know the instrument is “asleep”... -
Page 21: Recharging Nicad Batteries
NiCad pack will be shortened. Welch Allyn recommends unplugging the battery pack power input cord from the back of the audiometer and plugging the main line power cord into the jack if main line power is to be used most of the time. -
Page 22: Replacing Nicad Batteries
Replacing NiCad batteries Please refer to Figures 2, 3, 4 below and proceed as follows: 1. Unplug the AM 232 Manual Audiometer from the line power (mains). 2. Remove the two screws on the battery pack cover and lift off the cover. -
Page 23: Alkaline Battery Installation/Operation
To install the alkaline batteries, refer to figures 2, 3 and 4 on the previous page, and proceed as follows: 1. Unplug the AM 232 Manual Audiometer from the line power (mains). 2. Remove the two screws on the battery pack cover and lift off the cover. - Page 24 Blank page. 12-16-08...
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Page 25: Operation
Chapter 3 Operation Throughout this chapter are references to front panel (F) and rear panel (R) connec- tors, controls and indicators. Please refer to Connectors, Controls and Indicators and Figures 1 and 2 in Chapter 1 of this manual for specific descriptions and loca- tions. -
Page 26: Preliminary Check
Preliminary check 1. Prior to testing, ensure that the power cord and earphone cords are plugged in (R1 and R3 respectively). 2. Turn the audiometer on. 3. Select the desired tone type (F9 - pulsed, steady or FM). 4. Make whatever notations your procedure requires on the audiogram form. CAUTION Always handle earphones with care. -
Page 27: Instructing The Subject
Response handswitch If the optional response handswitch is to be used insure that the plugs and jacks are properly connected. The AM 232 Manual Audiometer front panel indicator will be illuminated when the subject presses the response button. 12-16-08... -
Page 28: Audiogram Form
Audiogram form The AM 232 Audiogram form (see Figure 1) consists of three distinct parts: • Space for entering information about the person to be tested. • A convenient chart for manually plotting test data. • Space for entering comments about the subject or the test. -
Page 29: Routine Calibration Check
This procedure should be performed when the Audiometer is installed, and be performed each month thereafter. If the AM 232 Manual Audiometer is to be used to monitor employee thresholds as part of an industrial Hearing Conservation Program, this “biological listening check” must be done at the beginning of each day the audiometer is to be used (per CFR 1910.95 Occupational Noise Exposure, March 8,... -
Page 30: Routine Test Administration
Routine test administration HL control (F3) The HL control increases or decreases the presented intensity in 5 dB HL steps with the currently available intensity displayed on the LCD. Rotating the Control knob clockwise increases the intensity; counterclockwise decreases intensity. When the maximum or minimum available intensity is reached for any frequency, the display will flash to alert you that the available range can not be exceeded. -
Page 31: Typical Testing Session
Typical testing session Pretest Review 1. Turn the instrument on. 2. Check that the earphones are operating properly. 3. Seat subject comfortably in the test area. 4. Explain the test procedure. 5. Assist subject with the earphones. 6. Select the desired tone type. 7. -
Page 32: Determining The Threshold (Pure Tone)
Determining the threshold (Pure Tone) 1. The level of the first presentation shall be 10 dB below the level at which the subject responded during the familiarization procedure. Present the tone for a period of one or two seconds. Time between tones can be varied, but not shorter than the duration of the test tone itself. -
Page 33: Routine Maintenance
Chapter 4 Routine Maintenance 12-16-08... -
Page 34: Calibration
Calibration The biological listening check, or routine calibration check, should be performed at least monthly. (See Routine calibration check in Chapter 3). The following checks should be made at periodic intervals, even if routine calibration checks do not reveal any problems. These procedures presuppose normal hearing on the part of the person doing the checking. -
Page 35: Hum And Random Noise
Distortion and frequency shift This check can be best made by listening to the output of the AM 232 Manual Audiometer through the earphones while presenting all 11 frequencies at a loud, but not uncomfortable, level (70 to 80 dB HL for normal ears.) -
Page 36: Exx
When an error code consisting of an “E” and a two digit number xx = number) appears on the audiometer’s display, a system error has been detected. The AM 232 Manual Audiometer will enter a “lockout” mode which will not permit the instrument to operate. -
Page 37: Bibliography
Bibliography American National Standard Specifications for Audiometers (ANSI S3.6 - 1989) Criteria for Permissible Ambient Noise During Audiometric Testing (ANSI S3.1 - 1977) Methods for Manual Pure-Tone Threshold Audiometry (ANSI S3.21 - 1978) Michael, P.L., and Bienvenue, G.R., “Noise Attenuation Characteristics of Supra- Aural Audiometric Headsets Using the Models MX41/AR and 51 Earphone Cush- ions,”... - Page 38 Blank page. 12-16-08...
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