Maico MA 50 - Technical Data

Operating Instructions MA 50
Geba_MA50_Fe_11a.doc 20 851 406/2 11/11
10 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,
3 kHz, 4 kHz, 6 kHz, 8 kHz
Level step: 5 dB level steps
Sound Pressure Level: AC with earphone Telephonics TDH 39:
- 10 dBHL ... 120 dBHL
( 500 Hz, 4 kHz, 6 kHz -10 dBHL ... 115 dBHL)
( 250 Hz, 8 kHz -10 dBHL ... 100 dBHL)
( 125 Hz -10 dBHL ... 80 dBHL)
BC with bone conduction receiver Radioear B 71:
- 10 dBHL ... 70 dBHL
( 500 Hz, 750 Hz, 3 kHz, 4 kHz, 6 kHz -10 dBHL ... 60 dBHL)
( 250 Hz -10 dBHL ... 40 dBHL)
( 125 Hz, 8 kHz no output )
( speech -10 dBHL ... 85 dBHL)
Insert earphone with optional EAR 3A:
- 10 dBHL ... 120 dBHL
( 750 Hz, 1.5 kHz -10 dBHL ... 115 dBHL)
( 500 Hz, 4 kHz -10 dBHL ... 110 dBHL)
( 250 Hz -10 dBHL ... 105 dBHL)
( 6 kHz -10 dBHL ... 95 dBHL)
( 125 Hz -10 dBHL ... 90 dBHL)
( 8 kHz -10 dBHL ... 85 dBHL)
Test Signal: Pure tone, pulse tone, warble tone, narrowband noise.
Modulation: Pulse tone: 0.5 s on/off
Warble tone: triangular, freq. devitation 5%, repetition rate 5 Hz
Functions: Tone presenter / interrupter
Tracking (fixed level difference between both channels)
Warm up time: less than 10 min after power on Environment
conditions: + 15 ... + 35 C / + 59 ... + 95 F (operation)
+ 5 ... + 50 C / + 41 ... + 122 F (storage)
Maximum humidity 90 % (storage and operation)
Dimensions: W x D x H: 36 x 46 x 15 cm / 14.2” x 18.1” x 5.9”
Weight: 4.6 kg / 10.1 lbs (with accessories 5.8 kg / 12.8 lbs)
Power Supply: 100 - 240 V~ 50/60 Hz ±10 %
Power Consumption: app. 25 VA
Device Fuses: 2x 1A slow blow