Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Maico MA 50
Summary of Contents for Maico MA 50
- Page 1 Operating Instructions MAICO MA 50...
-
Page 3: Table Of Contents
3.1 Unpacking your instrument ..............5 3.3 Getting familiar with the MA 50 ............. 7 3.3.1 Using the keyboard of the MA 50 ............8 3.3.2 The display of the MA 50 ..............8 4 Pure tone audiometry ................9 4.1 Air Conduction (AC) Testing .............. - Page 4 Operating Instructions MA 50 5.7 Tracking function ...................14 5.8 STIM Mode selection ................15 6 Recommended literature ................16 7 Computer interface ..................17 8 Care and maintenance of the instrument ..........18 9 Trouble shooting ..................19 10 Technical Data ..................20 11 Warranty, Maintenance and After-Sales Service ........24 12 Safety Regulations ................25...
-
Page 5: Introduction
CE-symbol according to Medical Directive 93/42/EEC. In designing the MA 50 we placed particular importance in making it a user- friendly device, meaning its operation is simple and easy to understand. And because MA 50 functions are software controlled, upgrading later to new, extended measurement functions will be simple and inexpensive. -
Page 6: Description
Operating Instructions MA 50 2 Description The MA 50 is an audiometer for pure tone audiometric tests. It can be used for ENT diagnostics in the office, and for mobile audiometry in clinics, homes and abroad. Tests can be performed using the TDH 39 headphones (AC), B 71 bone conduction receiver (BC) or optional insert phones. -
Page 7: Getting Started
3 Getting started 3.1 Unpacking your instrument Your MA 50 was carefully inspected and packed for shipping. However, it is a good practice to thoroughly inspect the outside of the shipping box for signs of damage. If any damage is noted, please notify the carrier immediately. - Page 8 Close the back cover and latch it with slight Picture 2 Portable with open cover pressure. The MA 50 should be operated in a quiet room, so that the audiometric examinations are not influenced by outside noises. For use in noisier environments headphones with optional sound insulation muffs are available.
-
Page 9: Getting Familiar With The Ma 50
Picture 6 MA 50 level and frequency control and down buttons. The design of the MA 50 makes it easy to control level, signal presentation and frequency with one hand. Geba_MA50_Fe_11a.doc 851 406/2 11/11... -
Page 10: Using The Keyboard Of The Ma 50
3.3.2 The display of the MA 50 The bright LED-Display of the MA 50 shows levels and frequency. The display shows the individual levels for the left channel on the left and the right channel on the right. -
Page 11: Pure Tone Audiometry
Proceed with presenting the test signal as described before. When you find a stable threshold value, note the level and frequency. If the MA 50 is connected to a PC, the value was stored with your last STIM presentation. Geba_MA50_Fe_11a.doc... -
Page 12: Uncomfortable Hearing Level (Ucl) Testing
Press the test channel selector button longer than 2 seconds. Picture 12 MA 50 display for UCL-test left The dot in the middle of the LED- display moves to the center of the display. -
Page 13: Bone Conduction (Bc) Testing
Operating Instructions MA 50 If the signal was recognized by the patient as not uncomfortable increase the level and proceed as described before. If the signal was uncomfortable for the patient note the values. Proceed accordingly with other test frequencies. -
Page 14: Masking Theory
Operating Instructions MA 50 Relevant to crossover is the sound level which is received by the opposite ear. The difference between the original test signal at the test ear and the received signal at the opposite ear is called “interaural attenuation”. -
Page 15: Automatic Masking
4.4.4 Automatic masking: With the manual masking, as described before, you have to readjust the masking level every time you change the test signal level. The MA 50 has a tracking feature for easy masking. Adjust for the test signal using the level control knob ↕, then with the masking level control knob ... -
Page 16: Quick Reference Guide
Operating Instructions MA 50 5 Quick reference guide 5.1 Startup settings Air conduction on both channels Pure tone with a level of 30dBHL on the right ear Narrow band noise with a level of -10dBHL on the left (masking) ear Presenter mode 5.2 Receiver selection... -
Page 17: Stim Mode Selection
Operating Instructions MA 50 5.8 STIM Mode selection Press STIM MODE key to switch between continuous presentation and presentation by pressing the STIM bar ↔. When in continuous presentation mode the STIM bars and function as interrupters. The light above the STIM MODE key ... -
Page 18: Recommended Literature
Operating Instructions MA 50 6 Recommended literature Audiometric Interpretation: A Manual of Basic Audiometry Lloyd, Lyle L., and Harriet Kaplan Baltimore: University Park Press, 1980 Auditory Disorders: A Manual for Clinical Evaluation Jerger, Susan, and James Jerger Boston: College Hill Press, 1981... -
Page 19: Computer Interface
Operating Instructions MA 50 7 Computer interface The MA 50 has a built-in serial RS 232 PC-interface for data transfer to a connected PC. The serial cable to connect the MA 50 with the PC should be a normal, non twisted 9-pin extension cable. It has a male and a female connector and all wires are direct 1:1 connected. -
Page 20: Care And Maintenance Of The Instrument
Operating Instructions MA 50 Care and maintenance of the instrument Disconnect the power plug before cleaning! To clean the instrument, headphones, bone conduction receiver, loudspeaker and other accessories use a soft cloth dampened with a little warm soapy water or washing-up liquid;... -
Page 21: Trouble Shooting
Operating Instructions MA 50 9 Trouble shooting If you should find that your instrument is no longer working properly during a test run, please check the following points: Diodes in the buttons do not light up and there is nothing to see on the LED-display : Is the power cord plugged in correctly? Check the power fuses ♦. -
Page 22: Technical Data
Operating Instructions MA 50 Technical Data The MA 50 audiometer is an active, diagnostic medical product according to the class IIa of the EU medical directive 93/42/EEC. Standards: IEC 645-1/ EN 60 645-1 : Type 3 ANSI S3.6-1996 : Type 3 Test-Frequencies: 125 Hz, 250 Hz, 500 Hz, 750 Hz, 1 kHz, 1.5 kHz, 2 kHz,... - Page 23 = 4 , U = 8 V AC (headphone) right channel sleeve=GND, tip=out =10, U =1 V AC (headphone) left channel sleeve=GND, tip=out =10 , U =1 V Picture 22 rear of MA 50 with connection plugs Geba_MA50_Fe_11a.doc 851 406/2 11/11...
- Page 24 Operating Instructions MA 50 Calibration values: AC-Receiver Telephonics TDH 39 Force: 4 ... 5 N Reference equivalent threshold Frequency [Hz] sound pressure level sound damping ISO 389 - 1 ANSI S3.6-1 with Coupler IEC 318-2 with Coupler NBS 9A [dB] (re 20 Pa [dB] (re 20 Pa...
- Page 25 Operating Instructions MA 50 Calibration values: Insert phone Eartone 3A (optional) Reference equivalent threshold Frequency [Hz] sound pressure level sound damping ISO 389 - 2 ANSI S3.6-1 with Coupler IEC 126 with Coupler HA-2 [dB] (re 20 Pa [dB] (re 20 Pa [dB] 32.5...
-
Page 26: Warranty, Maintenance And After-Sales Service
The MA 50 may be repaired and serviced only by your dealer or by a service center recommended by your dealer. We urgently advise you against... -
Page 27: Safety Regulations
Operating Instructions MA 50 Safety Regulations 12.1 Electrical Safety: The MA 50 audiometer is constructed to comply with protection class II of the international standard IEC 601-1 (EN 60601-1). Protection from an electric shock is ensured even without the system earth connection. The instruments are not intended for operation in areas with an explosion hazard. -
Page 28: Checklist For Subjective Audiometer Testing
Operating Instructions MA 50 Checklist for Subjective Audiometer Testing - Clean the ear and head cushion! Instrument:........- Untangle all lines when necessary Manufacturer:…........ - Are the headphone cushion in good condition? If not replace Serial No.:......... - Are plugs and leads in good condition/ undamaged? - Are all controls working properly? Examiner:........ - Page 29 Operating Instructions MA 50 Specifications are subject to change MAICO Diagnostic GmbH Salzufer 13/14 1058 Berlin Telefon +49 3070 71 46 50 Telefax +49 30 70 71 46 99 e-mail: export@maico.biz Internet: www.maico.biz Geba_MA50_Fe_11a.doc 851 406/2 11/11...
Need help?
Do you have a question about the MA 50 and is the answer not in the manual?
Questions and answers