MA 800 Operating Instructions Rev E Oct 2000

Operating Instructions MA 800 Table of Contents Warranty...1 1.0

Specifications...2

2.0

Introduction ...3

3.0 3.1 3.2 3.3 3.4 3.5

Inspection and Set-Up...4 External Inspection...4 Unpacking ...4 Standard Accessories ...4 Optional Accessories ...5 Sound Room Installation ...5

4.0

Keypad Function Guide...6

5.0

Operation and Setup of the MA 800...8 5.1 Main Menu...8 5.2 Audiometer ...8 5.2.1 Audiometer Subject Information Data Entry ...8 5.2.2 Audiometer Test Screen...10 5.3 Setup Menu...11 5.3.1 Test Procedure Menus ...12 5.3.2 Data Transfer Menu...14 5.3.3 Defined Questions Menu ...14 5.3.4 Storage Menu ...15 5.3.5 Printout Menu ...15 5.3.6 Date/Time Menu...18 5.3.7 Misc. Menu ...18 5.4 Tests and Baselines Menu ...19 5.4.1 Tests Menu...19 5.4.2 Baseline Menu...21 5.4.3 Memory Status Menu ...23 5.5 Daily Calibration Menu ...23

6.0

Test Procedures ...24 6.1 Environment ...24 6.2 Pretest Preparation...24

7.0 7.1 7.2 7.3

Automatic Testing ...25 Test Procedure ...25 Simplified Automatic Test Summary ...26 Test Result Codes...27

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Operating Instructions MA 800 8.0

Manual Testing...28 8.1 Test Procedure ...28 8.2 Simplified Manual Test Summary...29 8.3 Test Printout Example ...30

9.0

Printer ...31 9.1 Operation ...31 9.2 Paper Installation ...31 9.3 Paper Specification...31

10.0

Care and Maintenance ...32

11.0 RS 232 Computer Interface Information ...33 11.1 RS 232 Configuration and Operation ...33 11.2 Interface Configuration...33 11.3 MA 800 Data Output ...34

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Operating Instructions MA 800 WARRANTY This warranty is extended to the original purchaser of the MA 800 Audiometer by Maico through the authorized distributor from whom it was purchased and covers defects in material and workmanship for a period of one year from date of delivery of the audiometer to the original purchaser. If the MA 800 Audiometer contains a defect in material or workmanship, Maico, at its option, will repair or replace the instrument at no charge except for transportation to and from the point of service. It is the purchaser’s responsibility to return the audiometer to the Maico Special Instruments Distributor from whom it was purchased or directly to Maico after receiving authorization to return. This warranty does not cover accessory cords and breakage or failure occasioned by tampering, misuse, carelessness, accident or modification. The warranty is void if the MA 800 Audiometer is repaired by other than an authorized Maico Special Instrument Service Center.

NOTE: Specifications in this manual were in effect at the time of printing. Maico, whose policy is one of continuing progress, reserves the right to discontinue or change specifications or design at any time without notice or incurring obligation.

WARNING: The Maico MA 800 is designed to be used with a hospital grade outlet. Injury to personnel or damage to equipment can result when a three-prong to two-prong adapter is connected between the power plug and an AC outlet or extension cord.

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Operating Instructions MA 800 1.0 SPECIFICATIONS AUDIOMETRIC Test frequencies: Attenuator range: Attenuator linearity: Stimulus: Rise/Fall time: Distortion: Right/Left crosstalk: Stimulus on/off ratio:

500, 1000, 2000, 3000, 4000, 6000, 8000 Hz + 2%. 0-95 dBHL + 3 dB, 5 dB steps. + .5 dB/step. Pulsed, 2.5 pulses/second or continuous selectable. 35 msec. typical. .5% typical, 3% maximum. -100 dB minimum. 100 dB or -10HL, whichever is lower.

PRINTER Print time: Chart dimensions:

Approximately 12 seconds. 2.5” (6.35 cm) wide x 3.0” (7.62 cm) maximum diameter roll, thermal sensitive paper.

3M Type 1900 or equivalent, 3.0” (7.62 cm) maximum diameter roll. Printout, Labeled space for: Subject and Examiner. Printed data for: I.D. Number, Data, Job No., Noise Exposure, Hearing Protectors, Birth Date, Test Code Comments, Audiogram Results, Model and Serial Number, Calibration Date, and Calibration Specifications.

CONTROLS Front panel: Rear panel:

+5 dB, Stimulus, -10 dB, Left/Right, Save, Enter, Menu, Start, Stop, Print, and Data Entry/Frequency keys. Power Switch.

MECHANICAL Dimensions: Weight: Case:

14.5” (37.5 cm) wide by 4” (10.2 cm) high by 13”(33 cm) deep. 10 pounds (4.5 kg) with standard accessories. Durable ABS housing.

ELECTRICAL Voltage: Power consumption: Operation temp.: Storage temp.: Test headset:

117 or 234 VAC + 10%, 50-60 Hz externally selectable. 30 watts 60-100°F. (15° to 38°C). 0-120°F. (-18° to 49°C). TDH-39P earphones.

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Operating Instructions MA 800 2.0 INTRODUCTION Your Maico MA 800 Automatic Audiometer provides the latest in hearing evaluation technology. It is easy to use, reliable, and provides accurate testing in a fast, cost effective manner. It is flexible, so that it can be programmed to fit the needs of your particular testing program. A microprocessor in the MA 800 automatically presents a pure tone stimulus in discrete 5 dB steps, at random intervals of 2 to 4 seconds. The stimulus consists of three pulses, or if continuous tone is selected the stimulus stays on continuously for 1.2 seconds. The hearing level ranges from 0-95 dB, and the frequency ranges from 500 Hz to 8000 Hz. The subject responds by pushing a hand-held switch each time the stimulus is heard. The presentation method program used is the familiar “down 10, up 5” sequence, normally employed in manual pure tone audiometry. Test repeatability is established by the MA 800 at the beginning of each test to minimize unproductive test time. If the subject responds inappropriately before repeatability has been established by the instrument, the test will be terminated, a signal will sound and “Invalid Retest” message will be displayed on the screen. If, after repeatability has been established, the subject fails to establish a threshold at a given level, the audiometer will skip that frequency, and retest it one additional time after completion of the normal test procedure. When the automatic test procedure has been completed, a signal will sound to alert the operator that the test is finished, and the test results will be printed. The MA 800 will detect the following inappropriate response: MR- Multiple Responses to a pure tone stimulus presentation. NR- No Response, failure to respond at 95 dB HL. SE- Subject Error, failure to establish a threshold within 17 stimulus presentations. The MA 800 also has the capability to complete a variety of hearing loss calculations, including Standard Threshold Shift. Important subject information, such as noise exposure level and type of protector can become a part of each subject’s audiogram. On-board memory allows the MA 800 to store 500 audiometric tests, including the patient information recorded at the time of the test. 500 baseline tests may also be stored and used to conduct STS calculations. These test results will remain in the audiometer’s battery powered memory even if the instrument is turned off. The tests stored in memory can be transmitted to an external computer through the audiometer’s serial data port. Tests can also be transmitted immediately after the test under computer remote control. The MA 800 accepts many of the same commands from the keyboard panel through the serial interface.

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Operating Instructions MA 800 3.0 INSPECTION AND SET-UP 3.1

External Inspection

Your MA 800 was carefully inspected and packaged for shipping, however, it is a good practice to thoroughly inspect the outside of the shipping container for signs of damage. If any damage is noted after unpacking, notify your carrier immediately. 3.2

Unpacking

Open the top of the shipping carton and pull the foam packing from the top of the instrument. Remove the accessories and carefully remove your MA 800 from the shipping carton. Remove the plastic bag from the instrument and inspect the case for any damage. Notify the carrier immediately if any mechanical damage is noted. This will assure that a proper claim can be made. Save all packing material so the claim adjuster can inspect it as well. Notify Maico as soon as the adjuster has completed the inspection. SAVE ALL THE ORIGINAL PACKING MATERIAL AND THE SHIPPING CONTAINER SO THE INSTRUMENT CAN BE WELL-PACKAGED IF IT NEEDS TO BE RETURNED FOR SERVICING OR CALIBRATION. 3.3

Standard Accessories

Please check to verify that all standard accessories listed below are received in good condition. If any accessories are missing or damaged, immediately notify your Maico Special Instrument Distributor or Maico. Standard Accessories Chart Paper Dust Cover Operating Manual Patch Cords (2wire) Subject Response Switch Subject Dual Headset

Part Number 5496 5516 1162-9403 1025-352 2169 4687

The earphones are color-coded to eliminate the possibility of incorrect positioning. NOTE: One headset cord has a RED PLUG to identify the RIGHT EARPHONE CORD that connects to the RIGHT PHONE JACK. The BLUE PLUG connects the LEFT PHONE JACK. The SUBJECT RESPONSE CORD connects to the SUBJECT RESPONSE JACK. See Figure 2, below.

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Operating Instructions MA 800 4

3

5

6

2 1

FIGURE 2 MA 800 Rear Description 1. AC Power Connection 2. On/Off Power Switch 3. RS-232 Connector 4. Right Phone 3.4

5. Left Phone 6. Subject Response

Optional Accessories Optional Accessories Carrying Case Audiocup Headset

3.5

Part Number 1035-3002 4695

Sound Room Installation

If the MA 800 is used in conjunction with a sound room, three patch cords are needed; two cords are needed for the headset and one is needed for the subject response switch. two-wire patch cords are used for the headset and the subject response switch. These patch cords are supplied with the MA 800. If you have any questions while installing your MA 800, contact your authorized Maico Special Instrument Distributor.

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Operating Instructions MA 800 4.0 KEYPAD FUNCTION GUIDE

1

2

3

21

20

19

18

23 22

17 5 4

16

6

MA 800

15 7

8

9

10

11

12

13

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FIGURE 3 Many of the MA 800 keys have dual functions. The upper characters are used to enter data and set up the MA 800. The lower characters are used to operate the MA 800 audiometer. Instructions and key functions appear on the LCD screen.

DATA ENTRY KEY 1. 2. 3. 4. 5. 6. 7. 8. 9.

1 2 3 4 5 6 7 8 9

FUNCTION Enters 1 Enters 2 Enters 3 Enters 4 Enters 5 Enters 6 Enters 7 Enters 8 Enters 9

AUDIOMETER FUNCTION Manual selection of 1000 Hz stimulus. Manual selection of 2000 Hz stimulus. Manual selection of 3000 Hz stimulus. Manual selection of 4000 Hz stimulus. Manual selection of 500 Hz stimulus Manual selection of 6000 Hz stimulus. Manual selection of 8000 Hz stimulus.

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Operating Instructions MA 800 DATA ENTRY KEY 10. 11. 12. 13.

SAVE START STOP 3

14.

6

15.

4

16.

5

17.

↵

18. 19. 20 21. 22.

MENU STIM PRINT 0 Print cover LCD Display

23.

FUNCTION

AUDIOMETER FUNCTION

Saves data from manual testing and entered baselines. Starts the automatic test. Stops testing. Changes setting of highlighted items on the LCD Selects LEFT ear for screen automatic or manual testing.. Lowers intensity of Moves the highlighted box on the LCD screen. stimulus in 10 dB steps. Changes setting of highlighted items on the LCD Selects RIGHT ear for screen. automatic or manual testing. Raises intensity of Moves the highlighted box on the LCD screen stimulus in 5 dB steps. ENTER Enters completed data, selects item or moves to next screen Exits the current screen. Enters a space. Manually presents the stimulus Initiates audiogram printout. Enters 0 Access to the printer to add or change paper. Displays menu screen and test screen with patient information.

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Operating Instructions MA 800 5.0 OPERATION AND SETUP OF THE MA 800 The MA 800 can be customized to your particular testing requirements. There are many options you can select to create the type of test and printout that suits your testing needs. 5.1

Main Menu

MA 800 MAIN MENU AUDIOMETER

TESTS & BL’S

SETUP

DAILY CAL.

3456- Change Item ↵ - Select Item Highlight the desired item and press ENTER to enter that mode: AUDIOMETER - begins subject information entry and actual testing (see Section 5.2). SETUP - allows customization of all aspects of the audiometer (see Section 5.3). TESTS & BL’S - allows viewing, entering or clearing of tests and baselines stored in memory ( see Section 5.4). DAILY CAL. - runs a fast daily calibration of the MA 800 (see Section 5.5). 5.2

Audiometer

To begin audiometric testing highlight AUDIOMETER in the MA 800 MAIN MENU screen. Press the ENTER key. 5.2.1 Audiometer Subject Information Data Entry You may desire to have identifying data become part of each subjects audiogram. Data may include: Subject ID number for Social Security number, up to 9 digits Technician ID number, up to 9 digits* Job number, up to 6 digits Department, up to 6 digits Location, up to 6 digits* Exposure, up to 3 digits Protector, up to 6 digits Birth date Sex, M or F; change using 3or4keys *Data may be entered once, and until changed, is stored in memory permanently until changed. 8

Operating Instructions MA 800 Employee data is stored in the MA 800 memory and appears at the top of the audiogram printout. Press the desired upper case characters on the data entry keyboard. When you have completed entering the employee data, press the ENTER key and the following screen will appear. If the individual has been previously stored in memory, once the ID number is entered all patient information entered from the last test will be displayed on the screen, saving time not having to re-enter the information. If the information field has not been turned on from the SETUP, PRINTOUT menu, that field will not be displayed.

SUBJECT ID BIRTH DATE SEX TEST TYPE TECH. ID

11111111 01/07/60 F ANNUAL 123456789

↵ - Next Screen

JOB NUMBER DEPARTMENT LOCATION EXPOSURE PROTECTOR

333333 444444 555555 777 888888

56- Change Field MENU - Main Menu

The baseline information can now be entered or press the ENTER key to go to the audiometer testing mode.

BASELINE TEST DATA DATE FREQ LEFT RIGHT

08/27/96 (Hz) 500 1K 2K 3K 4K 6K 8K (dB) 00 00 00 00 00 00 00 (dB) 00 00 00 00 00 00 00

56- Change Field

ENTER - Manual Test

MENU - Main Menu

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Operating Instructions MA 800 Defined questions can be entered from SETUP, PRINTOUT menu and can be used to ask for added information. The answer to the question is a two digit code number.

LISTENS TO LOUD MUSIC HAD AN EAR ACHE NOISY HOBBIES DIFFICULT PATIENT GUNFIRE EXPOSURE

↵ - Next Screen

01 01 01 01 01

56- Change Field MENU – Prev. Screen

5.2.2 Audiometer Test Screen

1000 Hz

RESPONSE

STIMULUS

40 dB HL

FREQ (Hz) 500 1K 2K 3K 4K 6K 8K LEFT (dB) 00 00 00 00 00 00 00 RIGHT (dB) 00 00 00 00 00 00 00 START - Start Test STOP - Stop Test MENU - Next Subject All keys now operate in the audiometric modes. A manual test can be performed at this time or an automatic test can be started by pressing the START key. The starting ear for the automatic test can be selected as right or left in the manual mode, then press START to start the test.

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Operating Instructions MA 800 5.3

Setup Menu

To access the screens which lists all of the setup options, move the highlight to SETUP in the MA 800 MAIN MENU screen and press the ENTER key. The following will appear:

SETUP MENU TEST PROCEDURE DATA TRANSFER DEF. QUESTIONS

STORAGE PRINTOUT DATE/TIME

MISC.

3456- Change Item

↵ - Select Item

MENU - Main Menu

Highlight the setup option that you want to change or look at and press the ENTER key. TEST PROCEDURE allows changes to the type of test, or setting up of a custom test (User Defined). DATA TRANSFER allows changes to the RS 232 protocol or data information. DEFINED QUESTIONS allows setup of questions, like exposure to gun fire. STORAGE allows automatic storage of tests to be turned ON or OFF. PRINTOUT allows selecting what information is on the printout. DATE/TIME allows changing the date and time. MISC. allows changing the display contrast, the beep volume or setting up a password so that no changes can be made to the setup. The following pages show the various screens that list the options.

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Operating Instructions MA 800 5.3.1 Test Procedure Menu’s Test procedure allows you to customize the test to your specific needs and has several sub screens which follow.

CONTINUOUS TONE MANUAL TEST SETUP TYPE

ON ON STANDARD

34 - Change Setting ↵ - Next Screen

56 - Change Field MENU - Prev Screen

CONTINUOUS TONE - selects pulsed when OFF, or continuous tone stimulus when ON. MANUAL TEST ON – select to allow individual frequencies to be manually retested after a completed automatic test. SETUP TYPE selects the type of test to be used in the automatic testing mode. There are four types of tests that have been stored for use, STANDARD, NO 8K, 10dB low, fast, and two user definable tests. STANDARD test allows testing of all frequencies and 1 retest frequency at 1KHz in the left ear. Note that if the test is changed to start in the right ear the retest frequency also changes ears. The lower test limit is 00HL and the upper limit is 95HL. All start levels are set at VSL (variable start level, see below for an explanation) except for the first frequency in each ear which is set at 40HL. NO 8K is the same type test except 8KHz is not tested. 10dB LOW is the same type test as the standard test except that the lower test limit is set at 10dB. FAST test only tests 1, 4, 6KHz in each ear with the lower test limit at 10dB, upper limit is 95dB.

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Operating Instructions MA 800 User defined tests can be selected by changing the test type to USER1 or USER2 and pressing the ENTER key. Create your own test procedure using the following screens.

SECOND EAR SETUP FREQ START LOWER

1 500 40 00

2 1K VSL 00

3 2K VSL 00

4 3K VSL 00

34 - Change Setting ↵ - Next Screen

5 4K VSL 00

6 6K VSL 00

7 8 8K VSL 00

56 - Change Field MENU - Prev Screen

FIRST EAR: UPPER LIMIT

LEFT 95

34- Change Item

↵ - Setup Menu

MENU - Prev Screen

Up to 15 frequencies may be entered. If all frequencies are used this allows one retest frequency to establish repeatability. If fewer frequencies are used more retest frequencies can be used, one for each ear. The START LEVEL determines the level at which that frequency will start. If VSL (Variable Start Level) is selected the test will start at 10 dB above the previous threshold (Note: VSL may not be used for the first frequency). LOWER sets the lower test limit for the test. This is the lowest possible dB level that the automatic test will reach if all responses are positive. It can be useful for screening tests to speed up test time. FIRST EAR is the starting ear selected at the beginning of each test. This can be changed at the beginning of each test by changing ears, and it also changes the retest ear. The UPPER LIMIT is the maximum level that the test will increase to. By setting this level low for screening tests test time will be reduced.

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Operating Instructions MA 800 5.3.2 Data Transfer Menu

BAUD RATE PARITY STOP BITS XON / OFF

1200 EVEN 2 OFF

HARDWARE HANDSHAKE DELIMITED ASCII EXTENDED DATA

34- Change Setting ↵ - Setup Menu

OFF OFF OFF

56- Change Field EXIT - Setup Menu

The Computer Interface Connector is used to connect the MA 800 to any RS-232 standard data communication equipment. The data sent is serial ASCII, asynchronous, with selectable baud rates from 110-9600. Parity can be selected as even, odd or none. Stop bits can be selected as 1 or 2. XON/OFF selected ON inserts XON (DC2) and XOFF (DC4) characters at the beginning and end of each test (see section 12 for more information). Hardware handshaking ON or OFF activates or deactivates use of the CTS/RTS communication lines. Delimited ASCII selected ON inserts commas rather than spaces in between the data fields sent out the RS-232 port. Extended data transmits the baseline data along with all the other information out the RS-232 port. 5.3.3 Defined Questions Menu

LISTENS TO LOUD MUSIC HAD AN EAR ACHE NOISY HOBBIES DIFFICULT PATIENT GUNFIRE EXPOSURE

34- Change Char. ↵ - Setup Menu

ON ON OFF ON ON

56- Next / Prev. Char. MENU - Setup Menu

Five questions can be entered onto the screen to be shown on the printout. The questions can be 20 characters long. Examples of possible questions are shown on the menu example.

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Operating Instructions MA 800 5.3.4 Storage Menu Storage allows tests to be stored in internal memory for later recall automatically as tests are completed. Stored information includes Date and Time, ID#, Job #, Dept., Noise Exposure, Protector, Location, Technician ID#, Thresholds and the Baseline test, if entered. This information can then be printed out or transmitted through the RS-232 interface port to a computer (see Section 11).

AUTOMATIC TEST STORAGE

OFF

34- Change Setting

↵ - Setup Menu.

MENU - Prev. Screen

5.3.5 Printout Menu Printout allows customization of test results and subject information allowed on the printout; its sub-screens follow. Selecting items ON will allow them to be printed on the printout. SUB. DATA is selection of subjective data, which is the actual response from the subject to every presentation or the stimulus.

BIRTH DATE SEX TECH. ID JOB NUMBER DEPARTMENT

ON ON ON ON ON

LOCATION EXPOSURE PROTECTOR TEST TYPE SUB. DATA

34- Change Setting ↵ - Setup Menu

ON ON ON ON ON

56- Change Field MENU - Prev. Screen

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Operating Instructions MA 800 CAL. DATE selected ON prints the calibration date. CAL. DUE DATE selected ON prints the calibration due date (usually one year from calibration date). AUDIOGRAM selected ON prints the X and O audiogram of the test results (Note: Only thresholds of 0-85dB appear on the audiogram).

CAL. DATE CAL. DUE DATE AUDIOGRAM STS W-AGE COR. STS W-O AGE COR.

ON ON ON ON ON

AAO-1979 AAO-1965 AMA-1947 NY STATE CHABA

34- Change Setting

ON ON ON ON ON

56- Change Field

↵ - Next Screen

MENU - Prev. Screen

STS W/AGE COR. selected ON prints STS with age correction formula, which is: 2K, 3K, 4K thresholds for each ear, minus the age correction for each threshold, minus the baseline test results for each threshold divided by three. If the result is equal to or greater than 10dB it’s a standard threshold shift. STS W/O AGE COR. selected On prints the STS without age correction formula, which is the same as above except the age correction values are not subtracted. OSHA BASE is automatically put on the printout if either STS average is turned ON. It is the average of the baseline at 2, 3 and 4 Khz. AAO-1979 selected ON prints the hearing impairment calculation established by the American Academy of Ophthalmology and Otolaryngology in 1979, which is: The average of .5K, 1K, 2K, 3K minus 25dB, multiplied by 1.5 for each ear, and the better ear weighted 5 to 1. AAO-1965 selected ON prints the hearing impairment calculation established by the American Academy of Ophthalmology and Otolaryngology in 1965, which is : The average of .5K, 1K, minus 25dB, multiplied by 1.5 for each ear, and the better ear weighted 5 to 1. AAO-1947 selected ON prints the hearing impairment calculation established by the American Medical Association in 1947, which is: The average of .5K, 1K, 2K, 3K, 4K minus 25dB, multiplied by 1.5 (monaural impairment). NY STATE selected ON prints the hearing impairment calculation for New York state which is: The average of 1K, 2K 3K minus 25dB, multiplied by 1.5 for each ear, and the better ear weighted 5 to1. CHABA selected ON prints the hearing impairment calculation for the Committee on Hearing and Bioacoustics which is: The average of 1K, 2K, 3K minus 35dB, multiplied by 1.75 for each ear and the better ear weighted 5 to 1.

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Operating Instructions MA 800 .5-1-2K AVG. 1-2-3K AVG. 2-3-4K AVG. 3-4-6K AVG. 4-6-8K AVG.

ON ON ON ON ON

.5-1-2-3K AVG. WISCONSIN PRINT AFTER TEST PRINT ON COMMAND PRINT NAME

34- Change Setting

ON ON ON ON ON

56- Change Field

↵ - Next Screen

MENU - Prev. Screen

Selecting any of the AVERAGE ON will print the average of those frequencies for each ear. WISCONSIN selected ON prints the hearing impairment calculation for the state of Wisconsin which is: The average of .5K, 1K, 2K, 3K minus 30dB, multiplied by 1.6 for each ear, and the better ear weighted 5 to 1. PRINT AFTER TEST selected ON prints the entire test results at the end of the test. PRINT ON COMMAND selected ON will only print the test results when the PRINT key is pressed. If both of these are off the test will print the subjective date as the test is in progress and complete the printout at the end of the test. PRINT NAME selected ON will print the company name doing the testing if so entered or any desirable name. The name can be entered from the screen below and can only be 60 characters long (3 lines of 20 each).

NAME

Maico

34 - Change Char.

56 - Next/Prev Char.

↵ - Setup Menu

EXIT - Prev. Screen

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