MA 25 Operating Manual
19
Auto Threshold: Patient controlled Hughson-Westlake procedure according to ISO 8253-1
Store Function: Soft key (F-key) store button and internal memory for AC L/R. Stored
measurements can be view on built in display.
Distortion: 0.3% typical at full intensity
1% maximum at full intensity
Rise/fall Times: ~35 msec.
Display Header Indicators: Tone On
Patient Response
Power/Battery Status
Modulation: Warble +/- 5% 5 Hz.
Calibration:
Air Conduction: ISO 389-1/ANSI S3.6.
Dimensions:
W x D x H: 22.5 x 18 x 5.5 cm / 8.9 x 7.1 x 2.2 inches
Weight: 1.0 kg/2.2 lbs – including batteries and headset.
(1.6 kg/3.5 lbs – including carrying bag headset, audiogram charts etc.)
Power: 3 AA batteries
External Power Supply 5V DC 100, 110 – 120V AC 10%, 50 – 60 Hz. 220 - 240
50 – 60 Hz.
Construction: Plastic cabinet
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