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10
Technical Data
The MA 50 audiometer is an active, diagnostic
product according to the class IIa of the EU medical directive
93/42/EEC.
Standards:
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:
Sound Pressure Level: AC with earphone Telephonics TDH 39:
( 500 Hz, 4 kHz, 6 kHz
( 250 Hz, 8 kHz
( 125 Hz
-10 dBHL ... 80 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
( speech
-10 dBHL ... 85 dBHL)
( 750 Hz, 1.5 kHz
( 500 Hz, 4 kHz
( 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:
Modulation:
Warble tone:
Functions:
Warm up time:
conditions:
Dimensions:
Weight:
Power Supply:
Power Consumption: app. 25 VA
Device Fuses:
Geba_MA50_Fe_11a.doc
Operating Instructions MA 50
IEC 645-1/ EN 60 645-1 :
ANSI S3.6-1996 :
5 dB level steps
- 10 dBHL ... 120 dBHL
-10 dBHL ... 115 dBHL)
-10 dBHL ... 100 dBHL)
BC with bone conduction receiver Radioear B 71:
- 10 dBHL ... 70 dBHL
no output
Insert earphone with optional EAR 3A:
- 10 dBHL ... 120 dBHL
-10 dBHL ... 115 dBHL)
-10 dBHL ... 110 dBHL)
Pure tone, pulse tone, warble tone, narrowband noise.
Pulse tone:
triangular, freq. devitation 5%, repetition rate 5 Hz
Tone presenter / interrupter
Tracking (fixed level difference between both channels)
less than 10 min after power on Environment
+ 15 ... + 35 C / + 59 ... + 95 F (operation)
+ 5 ... + 50 C / + 41 ... + 122 F (storage)
Maximum humidity 90 % (storage and operation)
W x D x H: 36 x 46 x 15 cm / 14.2" x 18.1" x 5.9"
4.6 kg / 10.1 lbs (with accessories 5.8 kg / 12.8 lbs)
100 - 240 V~ 50/60 Hz ±10 %
2x 1A slow blow
Type 3
Type 3
)
0.5 s on/off
20
medical
851 406/2 11/11
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