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Welch Allyn AM 232, Руководство по эксплуатации

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4

12-16-08

Chapter 3

Operation

25

Preliminary check

26

Instructing the subject

27

Placing the earphones

27

Response handswitch

27

Audiogram form

28

Routine calibration check

29

Routine test administration

30

HL control (F3)

30

Range Extension pushbutton (F2)

30

Tone Type Selector (F9)

30

Typical testing session

31

Pretest Review

31

Familiarization

31

Determining the threshold (Pure Tone)

32

Testing procedure

32

Chapter 4

Routine Maintenance

33

Calibration

34

Earphone cords

34

Hum and random noise

35

Distortion and frequency shift

35

Special messages

35

CAL

35

Exx

36

Bibliography

37

Содержание AM 232

Страница 1: ...1 12 16 08 AM 232TM Manual Audiometer Operating Instruction Manual Part Number 1717 0101 Rev 05...

Страница 2: ...2 12 16 08 CE Mark per Medical Device Directive 93 42 EEC Electromagnetic compatibility EMC...

Страница 3: ...ls Indicators 11 Front panel controls and indicators see Figure 1 11 Rear panel connectors and indicators see Figure 2 12 Installation 14 Pretestprocedure 15 Pretest noise recovery period 15 Eliminati...

Страница 4: ...dministration 30 HL control F3 30 Range Extension pushbutton F2 30 Tone Type Selector F9 30 Typical testing session 31 Pretest Review 31 Familiarization 31 Determining the threshold Pure Tone 32 Testi...

Страница 5: ...ment or any component thereof is found to be defective or a variance from the manufacturer s specifications during the warranty period Welch Allyn will repair replace or recalibrate the instrument or...

Страница 6: ...a specifically calibrated audiometer and the periodic service and adjust ments for the instrument that may be required should be done only by an authorized Welch Allyn service technician CAUTION The A...

Страница 7: ...tectionagainstharmfulingressofwater Ordinary noprotection FrequencyRange DiscreteFrequencies 125 250 500 750 1000 1500 2000 3000 4000 6000 8000Hz Accuracy 3 TotalHarmonicDistortion 2 Intensity Ranges...

Страница 8: ...53cm Weight 5 6lb 2 53kg net 8 lb 3 64 kg shipping 10 lb 4 55 kg shipping with battery included SuppliedAccessories CatalogNumbers Test headset TDH39 23223 Audiogram Forms 1 pad of 50 52300 Instructi...

Страница 9: ...uilt in storage cavity and case provide enough room to contain all instrument accessories The clearly labeled front panel controls and full frequency range make accurate reliable testing a simple matt...

Страница 10: ...als so that the claim adjuster can inspect it as well As soon as the carrier has completed the inspection notify your Welch Allyn representative If the instrument must be returned to the factory repac...

Страница 11: ...an earphone Presentation indicated by illuminated greenLED F6 Subject response indicator shows you when the test subject has pressed the handswitch button by an illuminated green LED with optional ha...

Страница 12: ...panying document for instructions or warnings pertaining to these parts R3 Earphone output jacks standard phone jacks Front panel illustration shows left and right phone R4 Response handswitch input j...

Страница 13: ...13 12 16 08 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...

Страница 14: ...nt 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...

Страница 15: ...to the procurement of reliable audio grams Prior to testing allow adequate time for the subject to recover from the effects of a previous exposure to high level sound Tests should be performed in a q...

Страница 16: ...ended that the subject be seated about 1 meter 3 ft away from the instrument Maximum permissible test environment sound pressure levels are specified by American National Standard Criteria for Permiss...

Страница 17: ...ichtlinie vor Diese Richtlinie gilt nicht bei Kontamination des Produkts Detailliertere Informationen zur Entsorgung finden Sie unter www welchallyn com weee bzw erhalten Sie beim Kundendienst von Wel...

Страница 18: ...er 31 15 7505000 Norsk Produktet skal ikke kastes som restavfall Produktet skal leveres for gjenbruk eller som spesialavfall i henhold til Europaparlamentets og EU r dets direktiv 2002 96 EF om avfall...

Страница 19: ...tery 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 Pa...

Страница 20: ...e instrument will shut down after 5 minutes of no operation You will know the instrument is asleep because the LCD will show three dash lines To wake up the instrument press the Present bar There is n...

Страница 21: ...ck B c Plug the power cord into a wall outlet CAUTION Although no damage to the rechargeable NiCad batteries will occur if the pack is left charging for more than the 18 hours required for a full char...

Страница 22: ...Removing the battery pack Internal view of the battery compartment 4 Carefully disconnect the lead wires of the NiCad battery from the battery compart ment by removing the small connector 5 Remove the...

Страница 23: ...ry is actually a set of 6 batteries wrapped in plastic but they will be removed as a single unit 4 Carefully disconnect the lead wires of the NiCad battery from the battery compart ment by removing th...

Страница 24: ...24 12 16 08 Blankpage...

Страница 25: ...ut 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...

Страница 26: ...remechanicalshockmaychangetheiroperating characteristicsandrequiretheirreplacement IMPORTANT Always clean and maintain your earphone cushions for hygiene purposes Check periodically for cracking or si...

Страница 27: ...ne Modify the instructions accordingly if the optional response handswitch is to be used Placing the earphones The most important thing to remember is that a good seal is required between the earphone...

Страница 28: ...m 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 t...

Страница 29: ...sholds 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 E...

Страница 30: ...highest available intensities requiring the operator to make note of those individuals requiring testing at these levels It also prevents accidental presentation of the highest intensities to normal s...

Страница 31: ...nstrate the 1000 Hz tone at a 40 dB level The Tone Duration should be between 1 and 2 seconds 3 Set the HL control to 10 dB 4 Practice Beginning with the tone on continuously Present Bar held down gra...

Страница 32: ...nother ascending series is begun Note Down 10 dB Up 5 dB 2 The threshold is considered to be the minimum dial setting at which a response has occurred two out of three times Record this setting on the...

Страница 33: ...33 12 16 08 Chapter 4 Routine Maintenance...

Страница 34: ...d audiometer connectors This fraying will ultimately either decrease the signal level in the associated earphone or cause signals to be intermittent as the cord isflexed To check for either condition...

Страница 35: ...ne earphone but not in the other the chances are high that the earphones are at fault and should be replaced In any case the audiometer should be scheduled for immediate maintenance Special messages T...

Страница 36: ...c error code will remain on the display for several seconds then the instrument will shut itself down completely Should an Exx appear on the LCD take the following steps 1 Power down power up again Th...

Страница 37: ...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...

Страница 38: ...38 12 16 08 Blankpage...

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