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:
/- 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