Operating Instructions MA 30
Contents
1. M MAICO Diagnostic GmbH MAICO Operating Instructions MA 30 MAICO Diagnostic GmbH Salzufer 13 14 10587 Berlin Germany Telephone 49 30 70 71 46 50 M Operating instructions MA 30 MAICO 1 piecle 8 elle a pemmeaetereen eter etarter err teeter tits nnn Reteree Ser ee nie Trento Emre eet ere te ae 1 2 Instrument description cadet crepe cpstdhucesairtiac dca dea easati der cmouaideiviar dnd meatdecmaaneds 2 3 Unpacking and inspection acc cscusanessa noe opican cennanuelesiaexedaaanageasadaenseeheeeedomuwennetide 3 3 1 External INSpection aes tte dee Seraraepalesttuaientniinne tedaciedanctainasna addi taltnacnaiebiseadndtese 3 SPAO EAS Ree eee ae ee en ee eee ene ere ea eee ee ee 3 4 Installation and setup acess ures racxaae denn ieuninadasalataneesnainedatedasnigakonammandeaaiansouabnimedead 4 4 1 Where t set Up ieee ateatinc a cost ts eons poacto ss mares a agen ale idieanedceaoa enacted 4 4 2 HOWTO Set UPiss conis iane ccs tose cates saci ou eee nse desc EAE econ onan ii 4 4 3 Calibrating Mal gloat 1 1 8 eMee eee eee Ree meen Reece er een ee ee Ree ee eee 5 4 4 Display and control panel x ccs ccccessateces saveeen tacnoeoe deevevdoassPeenedsiadeontavelnansiende 6 5 Basics related to hearing disorders ineeie nnan nn rnanan annn an nenene nenene 8 5 1 Hearing Threshold see nveresaenmciadscnwansecpsasasdaveandadasnasdndacnansaienaiatcaseuaieanioeses 8 6 Performing Automatic AudiomMetry ac axssccaexseadua2. MAICO The response in the table view is stored as a numerical value in the row for the appropriate ear The test will continue until all frequencies have been tested for both the right and the left ear When the test is finished the following message will play through the headphones to the patient Please remove your earphones and place the earphones and the hand button on your chair 6 3 Error Messages There are several errors that the MA 30 is programmed to monitor If any of the following errors occur an appropriate instruction will be played through the earphones to the patient and the error will be displayed on the screen for the operator to view Multiple responses to a tone If the test person is continuously pressing and releasing the response button multiple times after only one tone is presented then the following message will play through the headset Listen carefully and make sure you hear a tone before pressing the hand button Release patient response switch If the test person is continuously holding down the response button without releasing it the following message will play through the headset You are not releasing the hand button quickly enough Remember to press and release the hand button as soon as you hear a tone Not responding at maximal level If the test person is not responding at all to the tones even at the loudest level then the following message will play through the headset As
3. Press the MENU button 14 again to exit the respective menu iiceeient After User Menu or user menu Figure 6 leaving the user menu you will Voice Prompt Language return to the test you last Audiometry Submenu d H ibl Automatic Audiometry settings of the MA 30 are as Device Information follows PC or Printer Display Contrast Reset to Default Voice Prompt Language The instructions and voice X prompts of the MA 30 will be Y Change Item l played back with the selected Enter Select item Menu Return language Up to 6 languages can be UE Or ee VENN programmed in the MA 30 Audiometry Submenu Figure 7 The following settings are possible Default setting Audiometry Submenu Display Audiogram i Presenter Interrupter Displa Audio ram Go to next freq after saving Table Audiogram z Level after frequency change i i i i Save Data with The audiogram is displayed either PA AA as a diagram or table for both the manual and automatic tests A y Change Item Presenter Interrupter You may Enter Select item Menu Return choose between presenter and interrupter mode Figure 7 Audiometry Submenu Geba _MA30_e_13b doc 16 852 094 3 03 13 M Operating instructions MA 30 MAICO Go to next frequency after saving ON OFF If this function is switched off the next frequency has to be selected by pressing lt 4 or in the manual mode Level after frequency change Remaining The test level remains if the
4. ctasraen ee een hae tecea ttt tE ten EE EEE ede dna eee EE EErEE 29 Geba _MA30_e_1 3b doc i 852 094 3 03 13 M Operating instructions MA 30 MAICO 1 Introduction Thank you very much for purchasing a quality product from MAICO The MA 30 is produced under the regulations of the European Medical Directive 93 42 EEC Qualified and signed with the CE symbol this device is manufactured according to the latest quality and security standards By designing the MA 30 we paid particular attention in making it a user friendly device easy to use and understand The instruments functions are controlled by software You have thus invested in a device that always will be up to date This user manual should make it as easy as possible for you to become familiar with the functions of the MA 30 Please open the flap of illustrations on the last page The description of the position e g of the controls displays and connections found again in this manual will make it easy for you to learn how to operate the MA 30 If you have problems with the operation of the device or you would like to make suggestions for improvement please get in touch with us Simply call your MAICO distributor Your MAICO Team Geba _MA30_e_13b doc 1 852 094 3 03 13 M Operating instructions MA 30 MAICO 2 Instrument description The Audiometer MA 30 is an automatic screening audiometer that provides fast and easy tests It has been designed for use in the
5. devices which can influence the function of this device Therefore do not use those types of instruments in close proximity to the MA 30 The test room should be at normal room temperature 15 C 59 F to 35 C 95 F and the instrument should be turned on about 10 minutes before the first measurement 4 2 How to set up Monitor Power switch Patient response switch connector Power connector Headphone connector red Serial interface Headphone connector blue Geba_MA30_e_13b doc 4 852 094 3 03 13 M Operating instructions MA 30 MAICO Setup is accomplished in five easy steps Plug the power cord into the rear panel Plug the power cord into a grounded outlet Connect the red right plug of the headphone into the socket marked R and the blue left plug into the socket marked L on the rear of the device Connect the plug of the patient response switch into the socket marked PAT Turn on the MA 30 with the switch at the rear of the device The right ear is selected the Right Ear LED is illuminated The device is in stand by mode now and a manual or automatic audiometry test may be started 4 3 Calibrating the device The instrument and headphones are a set and have the same serial number Because the headphones have been calibrated to this particular instrument use of other transducers is not recommended If one of the acoustic transducers has been replaced the instr
6. frequency has been changed Return to minimal level The next frequency will be measured at a start level of O dB Decrease by 30 dB The test level of the next frequency is decreased by 30 dB of the stored threshold of the last frequency tested Return to 30 dB The test level of the next frequency will start at 30 dB Save Data with Tone Enter Choose if the data will be saved by pressing the ENTER button or the STIMULUS button Advanced Settings The Advanced Settings screen Figure 8 displays additional audiometry settings Advanced frequency _ selection All ific f i i ows only specitic frequencies to Advanced Settings be displayed and tested from the audiometer test screen Choose l Advanced Frequency Selection On Off for each individual Pulse Tone as Default frequency The 1000 Hz frequency Return to 1 kHz Minimal Level 10 0 dB is turned on by default and Direction of Level Button cannot be turned off by the user These frequencies will be Av Ch It displayed for both the manual and ee automatic tests Enter Select item Menu Return Pulse Tone as Default ON OFF Re Enenvllenearcr ON indicates that the test will be conducted with pulsed tones in manual mode Attention The pulse tone may also be switched on by pressing the button SAVE 6 for a few seconds To witch off the pulse tone press the button START 5 for a few seconds Geba_MA30_e_13b doc 17 852 094 3 03 13 M Operati
7. from the main test screen in order to delete the results on the display for the current session or all of the data in the database Confirm your decision by pressing the appropriate button For hygienic reasons the ear cushions of the headphone should be cleaned after finishing the examination A new test can now be started by pressing the NEW button 15 then the ENTER button 13 to confirm A patient ID will automatically be assigned to the patient and can be viewed on the main test screen If you would like to enter a customized ID number press the NEW button 15 then enter an ID Geba_MA30_e_13b doc 14 852 094 3 03 13 M Operating instructions MA 30 MAICO number up to 9 digits using the numbers displayed next to the keys on the front panel of the instrument Figure 2 Geba _MA30_e_13b doc 15 852 094 3 03 13 M Operating instructions MA 30 MAICO 8 Set up of MA 30 for your individual needs The MA 30 is pre configured for most requirements If you still require some functions to be set up for your individual needs enter the user menu After having set the changes they are saved in the device The settings remain unchanged even if the device has been switched off Press the MENU button 14 By pressing the W 11 or A button 12 the different menu options can be chosen The selected menu is highlighted Press the ENTER button 13 to choose the respective submenu and to select confirm and save the new setting
8. soon as you hear a tone even if it is very soft quickly press and release the hand button NR no response will be recorded for particular ear and frequency for which this condition occurred 6 4 Evaluation of the test The test results are recorded on the screen display for each test frequency for both ears Results for a current session or all stored sessions may be printed with the optional printer by pressing the PRINT 3 key from the main test screen Confirm your choice by pressing the appropriate button MA 30 printer must be attached and set up in the user menu Geba_MA30_e_13b doc 11 852 094 3 03 13 M Operating Instructions MA 30 MAICO Press the ERASE button 2 in order to delete the results on the display and to start a test for a new test person Just the current session may deleted or the entire database includes all strored test persons may be deleted Confirm your choice by pressing the appropriate button ERASE 2 to delete session PRINT 3 to delete the database To start a new test press the NEW button 15 The MA 30 will display the automatic assigned patient ID number Press enter to confirm this number and the main test screen will be displayed with a blank audiogram or table ready to start a new test If you would like to enter a customized ID number press the NEW button 15 then enter an ID number up to 9 digits using the numbers displayed next to the keys on the front panel of the instru
9. 03 13 M Operating instructions MA 30 MAICO Connection plugs Connections Mains left right mains Serial interface 1 GND 2 RX 3 TX Patient response switch Sleeve Mass Tip Input Headset right red Sleeve Mass Tip Output Headset left blue Sleeve Mass Tip Output Monitor Specifications 100 240 V 50 60 Hz middle protection earth RS 232 C R 500 Q Za 8Q Un 3 5 Vest Za 8Q Up 3 5 Vest Geba_MA30_e_13b doc 23 852 094 3 03 13 M Operating Instructions MA 30 MAICO Calibration values AC Headphone DD45 Force 4 5 N Equivalent threshold sound pressure level with coupler according to IEC 60318 3 Frequency Hz dB re 20 uPa Calibration values Holmco 8103 Headset Force 13 16 N Equivalent threshold sound pressure level with coupler according to IEC 60318 3 Geba _MA30_e_13b doc 24 852 094 3 03 13 M Operating Instructions MA 30 MAICO Calibration values AC Headphone TDH39 Force 4 5N Equivalent threshold sound pressure level with coupler according to IEC 60318 3 Frequency Hz dB re 20 Pa Calibration values AC Headphone DD65 Force 9 5 11 7 N Equivalent threshold sound pressure level with coupler according to IEC 60318 3 l Geba_MA30_e_13b doc 25 852 094 3 03 13 M Operating instructions MA 30 MAICO Standard accessories 1 Audiometer MA 30 1 Mains cable 1 AC Headset DD45 1 Patient response button 1 Pad of au
10. W button 15 The MA 30 will display the automatic assigned patient ID number Press ENTER 13 to confirm this number and the main test screen will be displayed aa a with a blank audiogram or table ready to start a new Pa test If you would like to enter a customized ID number press the NEW WMAICO MA30 Cd button 15 then enter an ID Figure 2 Numbers at the front panel number up to 9 digits using the numbers displayed next to the keys on the front panel of the instrument Figure 2 Press ENTER 13 to confirm and begin the test The following procedure is based on the basic screen that appears Chapter 7 will instruct you how to customize the set up Testing will begin in the right ear at 1000 Hz Right will be highlighted and the cursor will indicate the level and frequency where the test will start Geba_MA30_e_13b doc 9 852 094 3 03 13 M Operating instructions MA 30 MAICO Press the START button 5 in order to start the automatic audiometry test The test person will hear the following initial set of instructions in their headphones You will hear different tones through your headphones As soon as you hear a tone even if it is very soft quickly press and release the hand button Following these instructions the test will immediately begin by presenting the first tone The tone is represented as cross hairs in the audiogram view Figure 3 The r Te eae paa horizonta
11. amage Broken or defective cords can cause crackling noise and intermittent or weak operation in the headset Headset cords may be replaced without recalibrating the audiometer l Geba_MA30_e_13b doc 21 852 094 3 03 13 N MAICO Operating Instructions MA 30 10 Technical data and accessories CE The MA 30 is an active diagnostic medical product according to class lla 0123 Tone Audiometer class Test signal Test frequencies Hearing level AC Headset DD45 AC Headset DD65 Holmco 8103 Headset Air conduction headset TDH 39 Presenter mode Interrupter mode Voice prompt signal source Electrical safety Main voltage Power consumption Warm up time Environment conditions Dimensions Weight Geba_MA30_e_13b doc 22 of the EU Medical Directive 93 42 EEC EN 60645 1 class 4 Pure tone 250 500 Hz 750 Hz 1 1 5 2 3 4 6 8 kHz adjustable in 5 dB steps 10 dBy to 100 dBy 10 dBy to 100 dByy 10 dBy to 100 dByy 10 dBu to 100 dByy Tone will be presented when pressing the STIMULUS button Tone will be interrupted when pressing the STIMULUS button MP3 sound file EN 60601 1 class 100 to 240 V 10 50 60 Hz 25 VA gt 10 min after power on 15 C to 35 C 59 F to 95 F operation 5 C to 50 C 41 F to 122 F storage max humidity 90 storage and operation WxDxH 30x25x6cm 11 8 x 9 8 x 2 4 1 3 kg 2 86 lbs 852 094 3
12. d accessories use a soft cloth dampened with a little warm soapy water no alcohol based cleaner should be used The ear cushions of the headphones can be detached for cleaning To remove the ear cushion pull it gently from the earphone To assemble the cleaned or changed cushion press it on the earphone and make sure that it sits properly The sound outlet hole must be exactly in the middle of earphone During cleaning make sure that no liquids run into the switches headphone capsules or loudspeaker openings To maximize the service life of your audiometer and accessory equipment we suggest the following Turn off the instrument overnight Wipe the headset cords ear cushions and casing occasionally with a cloth dampened not dripping wet with warm water Dry with a soft cloth Leave the accessories such as the headset power supply module and operator earphone permanently connected to the audiometer to minimize strain on the connections It is not necessary to disconnect accessories that are not in use while performing other tests Should it be necessary to disconnect cords always grasp the barrel of the plug never pull the cords Never drop or snap the headphones together Mechanical shock may change the earphone s electrical and operational characteristics and require recalibration of the MA 30 Avoid sharply bending or twisting any of the cords Although they are designed to be highly flexible rough treatment may cause d
13. diogram forms 50 sheets 1 Operating instructions 1 Carrying Bag Optional accessories Headset Holmco 8103 Headset TDH39 AC Headset DD65 External thermal printer Consumables 1 pad audiogram forms 50 sheets 1 roll of printer paper l Geba_MA30_e_13b doc 26 852 094 3 03 13 M Operating instructions MA 30 MAICO 11 Troubleshooting If your instrument is no longer working properly please check the following points Lamps do not light up Is the power switch on Is the power cord plugged in correctly in the power connector Is the wall outlet working No sound from headphone Is the headphone cable plugged correctly in the socket Is the lead loose or defective If your instrument still does not work properly after this short check please consult your dealer or send the instrument to your dealer or a service center Please include a detailed description of faults l Geba_MA30_e_13b doc 27 852 094 3 03 13 M Operating instructions MA 30 MAICO 12 Warranty maintenance and after sales service The MAICO MA 30 Audiometer is guaranteed for 2 years This warranty is extended to the original purchaser of the instrument by MAICO through the distributor from whom it was purchased and covers defects in material and workmanship for a period of two years from date of delivery of the instrument to the original purchaser The MA 30 may be repaired and serviced only by your dealer or by a service center recomm
14. echoneeddeunelsevsatdutendeamadedemereretiivents 9 6 1 Preparing the test DETSOM sca sscsccateennceenttcsesincdonndstausacoiaaiObacmabeerumebedaiatanies 9 PEAL a cantons sect cteraceescectecesteeetersectere taevecce sa neeer ther denese duce searaccemmeecuteceee 9 6 3 Errol MessdgES ae rere eerie na eE Eae EAEE Ea RE ns 11 6 4 Evaluation of the teSt s sisnsinisinisirrninrnrnrnrninrn nn rnrnrnrnrnnn rnrn rnrn rnrn 11 6 5 Changing the voice prompt language sssssiensieneie terene rnrn rn nennen 12 7 Performing Manual Pure tone Tests scccicecsedsssscscascnesslevnenteneasssaccennencedesenens 13 7 1 Changing from an automatic to a manual test ccceeeeceeeeeeeeeteeees 13 7 2 Testing in manual Mode saccn ss cxacacscnstiece sAtebuossancnnonsacrdedecdanbecet beeeaueeteeecns cs 13 TEENE E ete E EEA 14 7 4 Evaluation of the test results tsk cc snccasecossenete shieusicansbandds Sadiede saeeiecdieustencs 14 8 Set up of MA 30 for your individual N dS ccceeeeeccceeeeseeeeeeettteeeeeeeeeees 16 9 Care and maintenance of the instrUMeNt cccceeeeccececeeeeeseeststseeeeeeeeees 21 10 Technical data ANd accessories cccccccceceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 22 11 Ice e ts aroleld e Bere ene eee ee a ements nT ey meen een eine seen emir me 27 12 Warranty maintenance and after sales Service s sisieieinieenre rriren rnrn 28 13 Safety regulations atest tet ashe pan
15. ended by your dealer We urgently advise you against attempting to rectify any faults yourself or commissioning non experts to do SO In the event of repair during the guarantee period please enclose evidence of purchase with the instrument In order to ensure that your instrument works properly the MA 30 should be checked and calibrated at least once a year This check has to be carried out by your dealer When returning the instrument for repairs it is essential to send the headphones as well Send the device to your dealer or to a service center authorized by your dealer Please include a detailed description of faults In order to prevent damage in transit please use the original packing if possible when returning the instrument Within the European Union it is illegal to dispose electric and electronic waste as unsorted municipal waste According to this all MAICO products sold after August 13 2005 are marked with a crossed out wheeled bin Within the limits of Article 9 of DIRECTIVE 2002 96 EC on waste electrical and electronic equipment WEEE MAICO has changed their sales policy To avoid additional distribution costs we assign the r responsibility for the proper collection and treatment according legal regulations to our customers Geba _MA30_e_13b doc 28 852 094 3 03 13 M Operating instructions MA 30 MAICO 13 Safety regulations Geba _MA30_e_13b doc Electrical Safety The MAICO MA 30 is specified to comp
16. est level by pressing the Down cursor 11 The chosen test level is shown on the display A tone will be presented when you touch the STIMULUS touch bar 9 As soon as the button is touched the STIMULUS field on the display is highlighted If the field is already highlighted when starting the test the Interrupter Mode is selected The tone is presented as cross hairs in the audiogram view Figure 5 The horizontal axis indicates the frequencies 250 Hz 8 kHz and the vertical axis indicates the levels at which the test tone is given Frequency of the tone being presented in the table view is indicated by the column in which the cursor is located The level of the signal is displayed as a numerical value under the current test frequency Figure 4 When the patient pushes the patient response switch to signal that he she just heard the test tone the RESPONSE field is highlighted on the display When the patient s hearing threshold is established or screening protocol has been met press the ENTER key to manually store the result on the screen The level and frequency of the response is marked by an O for the right ear or an X for the left ear in the audiogram view The response in the table view is stored as a numerical value in the row for the appropriate ear Geba_MA30_e_13b doc 13 852 094 3 03 13 M Operating instructions MA 30 MAICO The cross hairs automatically go on to the next frequency Change level with a
17. he patient should be referred for further audiological examination While the screening test is easy to facilitate with the MA 30 results may still be unreliable if the following factors are in play e disturbing noise in the test room insufficient cooperation by the patient poor power of concentration on the part of the patient the patient did not comprehend the test procedure the measuring instrument is not functioning Geba_MA30_e_13b doc 8 852 094 3 03 13 M Operating instructions MA 30 MAICO 6 Performing Automatic Audiometry 6 1 Preparing the test person Directions regarding the hearing test should be explained to the test person The test person will hear a series of soft beeps and should listen very carefully The test person should press and release the response button as soon as he she hears the sound even if it is very soft Testing will be conducted in the right ear first and then in the left ear The test person will hear directions given through the earphones and should listen to those carefully when they are presented After the test is explained carefully place the headphones on the test person with the RED phone on the RIGHT ear and the BLUE phone on the LEFT ear Be sure that the speaker portion of the earphone is lined up with the opening of the test person s ear canal Give the patient response switch to the test person and the test is now ready to begin 6 2 Testing To start a new test press the NE
18. l axis indicates the wo e a a a a a a E frequencies 250 Hz 8 kHz and the 20 T E vertical axis indicates the levels at EDT a 20 which the test tone is given 50 ee RESPONSE Frequency of the tone being presented 60 gt STIMULUS in the table view is indicated by the i a en is column in which the cursor is located es oe ee The level of the signal is displayed as a A a a numerical value under the current test frequency Figure 4 If the test person does not respond by pressing the hand button the tone will go up 5 dB This will continue until the test person responds to the FREQ HZ tone When the test person presses 2 72 746 bak 1m ek the hand button in response to the E tone the level will decrease by 10 dB and then ascend in 5 dB steps until RICH the patient responds again This ae ee pattern of increasing by 5 dB and Figure 4 Table at 20 dB decreasing by 10 dB will continue until the patient has two out of three ioe Wh oe i oe ii responses at a particular level gare Se Ae Te ee ee After this threshold is established it is i i a displayed on the test screen The level ee ee eo eee and frequency of the response is 60 STIMULUS marked by an O for the right ear or Sen a ee X for the left ear in the audiogram view Figure 5 Figure 5 Audiogram view Geba_MA30_e_13b doc 10 852 094 3 03 13 M Operating instructions MA 30
19. ly with protection class of the international standard IEC 601 1 EN 60601 1 The instrument is not intended for operation in areas with an explosion hazard Measuring security To guarantee that the instrument works properly it has to be checked at least once a year The service and calibration must be performed by an authorized service centre In accordance with the regulations of the EU medical directive we will drop our liability if these checks are not done Device control The user of the instrument should perform a subjective instrument check once a week 29 852 094 3 03 13 M Operating instructions MA 30 MAICO Specifications are subject to change MAICO Geba _MA30_e_13b doc MAICO Diagnostic GmbH Salzufer 13 14 10587 Berlin Telefon 49 30 70 71 46 50 Telefax 49 30 70 71 46 99 e mail sales maico biz internet www maico biz 30 852 094 3 03 13
20. ment Figure 2 6 5 Changing the voice prompt language To change the language of the instructions the test person hears during the test press MENU 14 Move the arrow key 11 down until Voice Prompt Language is highlighted and press ENTER 13 The next screen will show you the language options that are programmed into the MA 30 Press the down arrow key until the language you wish to select is highlighted and press ENTER 13 You can now start the test Geba_MA30_e_13b doc 12 852 094 3 03 13 M Operating instructions MA 30 MAICO 7 Performing Manual Pure tone Tests 7 1 Changing from an automatic to a manual test The automatic audiometry test can be over ridden at any time in order to continue with a manually administered test Press STOP 4 at any time during the automatic test to pause the test Press STOP 4 again in order to end the automatic test and continue with a manual presentation of the tones Test Finished will be displayed on the screen to indicate that the automatic test has been stopped 7 2 Testing in manual mode Press the STOP button 4 twice as stated above in order to stop automatic testing and begin manual testing Any thresholds that were stored during the automatic test will remain on the screen By pressing either the Left 8 or the right cursor 10 the frequencies can be selected Choose the frequency to be tested and increase the test level by pressing the Up cursor 12 or decrease the t
21. mode Choose from 0 to 90 dB in 5 dB steps Start Level Level at which the automatic test will be initiated This level can only be as low as the Minimal Level choose from 0 to 90 dB in 5 dB steps Geba_MA30_e_13b doc 18 852 094 3 03 13 M Operating instructions MA 30 MAICO Pause Length Length between tone presentations in addition to the randomized time variable choose from 1 to 99 seconds Variable Start Level ON OFF ON will start the test level 10dB lower than the previously recorded threshold OFF will always return to the start level indicated in the menu item above at each frequency tested Retest NONE only 1 kHZ All Errors 1kHz amp Errors NONE All frequencies will be tested only once for each ear regardless of recorded results Only 1 kHz 1000 Hz will be retested in order to make sure that the patient s responses are valid All Errors Frequencies that have errors recorded instead of a threshold value will be retested at the end of the test 1 kHz amp Errors 1000 Hz will be retested as well as all frequencies containing recorded errors Continue on Error ON OFF ON will continue to test the next frequency after an error is recorded without stopping the test OFF will pause the test after an error is recorded to allow the operator to intervene Test with Pulse tone ON OFF ON will use pulse tones when testing in the automatic audiometry mode OFF will use a contin
22. ng instructions MA 30 MAICO Return to 1 kHz After having reached the highest 8 kHz or lowest 250 Hz test frequency by pressing ENTER 13 the test frequency of 1 kHz is automatically selected Setting ON can be turned OFF Minimal level 10 0 dB The hearing threshold test and the audiogram start either at 10 dB or O dB Default setting O dB Direction of level button Cursor button for level increase up down This function sets the direction of the button decreasing up in level increasing down in level or vice versa in order to change level in manual mode Attention Saving data with STIMULUS button is only possible if you have set up the function interrupter mode instead of presenter mode setting Automatic Audiometry Figure 9 This menu sets how the MA 30 is performed in Automatic Mode cade The following settings are Minimal level possible bt Pause length Mode Screening Threshold Variable Start level Retest Continue on Error Screening means that only one Test with Pulse tones level with be tested start level SOA Aa Threshold Hughson Westlake A v Change Item means that the 10 dB down 5 dB Enter Select item Menu Return up procedure will be used to establish a threshold Figure 9 Minimal Level This is the lowest level that will be tested in the automatic mode Choose from 0 to 90 dB in 5 dB steps Maximal Level This is the highest level that will be tested in the automatic
23. office of the paediatrician and in general practice in the public health services and in occupational medicine As an automatic audiometer the pure tone test runs on its own saving time and the need for constantly working with the dials Also included are voice prompts that give the patient instructions at the beginning of the test as well as directions during the test As soon as you hear a tone even if it is very soft quickly press and release the hand button The voice prompts are available in different languages such as English French and Spanish Other native languages can be entered easily Manual testing for the traditional hands on procedure is also available The test frequencies are freely selectable just as required according to standards for industrial health and the hearing level is adjustable in 5 dB steps The instrument can store up to 200 audiograms at a time The test can be monitored on the large LCD screen as it proceeds Geba_MA30_e_13b doc 2 852 094 3 03 13 M Operating instructions MA 30 MAICO 3 Unpacking and inspection 3 1 External inspection Your MA 30 was carefully inspected and packed for shipping However it is good practice to thoroughly inspect the outside of the shipping container for signs of damage If any damage is noted please notify the carrier immediately 3 2 Unpacking Remove the upper layer of packing material from the top of the instrument Carefully lift the instrument f
24. rom the shipping carton and remove the plastic bag Inspect the case for signs of any damage Notify the carrier immediately if any signs of mechanical or physical damage are found will ensure that a proper claim is made Save all packing materials so that the claim adjuster can inspect them as well When the adjuster has completed the inspection notify your MAICO Special Instrument Distributor Save all the original packing materials and the shipping carton so the instrument can be properly packaged if it needs to be returned for service or calibration Open the box containing the MA 30 and check to see that you have the following items Audiometer MA 30 Mains cable AC Headset DD45 Patient response button Pad of audiogram forms 50 sheets Operating instructions Soft sided carrying case Please check that all items listed above are received in good condition If any items are missing or damaged immediately notify your MAICO Special Instrument Distributor Geba _MA30_e_13b doc 3 852 094 3 03 13 M Operating instructions MA 30 MAICO 4 Installation and setup 4 1 Where to set up A quiet room furnished with a desk or table is ideal for using the MA 30 If a separate room is not available try to locate an area with minimal noise and distractions Remember background or ambient noise can distract and affect the results of the test Electro medical instruments emit strong electromagnetic fields e g microwave radiotherapy
25. rrow keys as described above Save the patient s response by pressing the ENTER button 13 The measurements are connected by a line in the audiogram view Figure 5 Proceed with the test as described above for all of the other test frequencies The next measured points will be reflected on the table After saving the results at the highest test frequency the cross hairs automatically return to the test results at 1 kHz Retest the results at 1 kHz The patient is now trained and a better result can be expected Select the low frequencies by pressing the lt button and measure the hearing threshold at low tones After finishing the test the hearing threshold is now visible By pressing the lt or gt button you can now go from one test result to the other The test level at which the patient signaled hearing each tone is indicated on the display 7 3 Switching ears Switch ears by pressing the L R button 7 in order to present the tones and store results for the appropriate ear The Right 16 or Left 17 LED will light up for the appropriate test ear and RIGHT or LEFT will also be highlighted on the test screen 7 4 Evaluation of the test results The test results can now be printed with the optional printer by pressing the PRINT 3 button from the main test screen Results from the current session only or from all stored sessions may be printed Confirm your choice by pressing the appropriate button Press the ERASE button 2
26. the left ear 7 852 094 3 03 13 M Operating Instructions MA 30 MAICO 5 Basics related to hearing disorders 5 1 Hearing Threshold The hearing threshold is the lowest sound level a person can hear This threshold is measured in dB decibels As a result of large scaled mass screenings the hearing threshold of young normal hearing people is defined as O dBu Index HL is short for hearing level So a hearing threshold of O dBy is called normal and means that there is no hearing loss On the other hand a threshold of 70 dBu would indicate poorer hearing since sound is heard only when its intensity is 70 dB higher than normal In the reverse case of a negative value e g 10 dB the hearing is even better than normal The hearing threshold is measured using pure tones with frequencies from about 125 Hz up to 8000 Hz with adults and 250 Hz up to 4000 Hz with children These pure tone audiometric tests are rather time consuming and require high concentration and cooperation of the tested person So the tests can be difficult especially with children To find out if there is a hearing disorder it is not necessary to start the examination with a pure tone audiometric test but instead by checking the hearing threshold below a certain limiting level using a screening test If the patient s hearing threshold is below that limit normal hearing is indicated If the hearing threshold exceeds the limit or there are other concerns or indications t
27. ument must be recalibrated or the measurements will be incorrect Use of non calibrated instruments leads to incorrect measurements Geba_MA30_e_13b doc 5 852 094 3 03 13 NN Operating instructions MA 30 MAICO 4 4 Display and control panel MAICO Diagnostic GmbH Germany MA30 Industrial Overlay 896 100 Index A 29 August 2006 D 0000 Geba _MA30_e_13b doc 6 852 094 3 03 13 M Operating instructions MA 30 MAICO LCD screen Erase button Print button Pause Stop button SOOO Start button Save button L R button Left cursor Stimulus touch bar OROROORO Right cursor Down cursor Up cursor Enter Menu New button LED Right LED Left OROROORO Geba _MA30_e_13b doc To monitor the test Deletes results on display and starts new test To print test with optional printer Pauses automatic test and finishes automatic when pressing it twice Starts the automatic test Saves the test results Selects right or left ear Decreases the frequency Hz in audiometry mode Presents or interrupts tone stimulus during audiometric testing Increases the frequency Hz in audiometry mode Decreases the intensity level dB in audiometry mode Increases the intensity level dB in audiometry mode Enters the highlighted menu or the highlighted option Enters the main menu screen Starts a new test On test signal is presented to the right ear On test signal is presented to
28. uous tone when testing in the automatic audiometry mode Voice Prompts ON OFF ON will allow voice prompts to be presented to the patients during testing These include instructions and error messages OFF will conduct testing without any voice prompts to instruct the patient Geba_MA30_e_13b doc 19 852 094 3 03 13 M Operating Instructions MA 30 MAICO Additional items on the User Menu screen Figure 6 include Display language The language of the instructions shown on the display can be selected English Spanish German and French are available as operating languages This selection does NOT affect the voice prompt language Device information General information can be found here e g software version serial number and quantity of tests Attention If you want to set time and date and time press the button Enter 14 PC or Printer Select PC data transfer or Print serial If the printer is attached Print serial must be selected in this menu Display contrast By pressing the w 11 or 4 button 12 the display can be adapted to your personal requirements Press the ENTER button 13 to confirm your selection Reset to Default Returns all settings to factory default settings Geba_MA30_e_13b doc 20 852 094 3 03 13 M Operating instructions MA 30 MAICO 9 Care and maintenance of the instrument Disconnect the main cables before cleaning To clean the instrument headphones an
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