Operating Instructions MA 25 / MA 25e
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10 Technical data
Standards
Audiometer : EN 60645-1/ANSI S3.6, Type 4
Safety : EN 60601-1
EMC : EN 60601-1-2
Frequencies and Maximum Intensities:
Inputs: Patient response switch, USB-Power-Supply
Outputs: Left AC, Right AC
Attenuator: -10 to 100 dB HL in 5 dB steps.
Tone Presentation: Manual or reverse (chosen in Setup Menu);
Multiple pulses 250 or 500 msec (chosen in Setup
Menu); On/Off; pure tone or warble tone
Talk Forward (MA 25e): Built in talk forward microphone
0-100 dB
SPL
adjustable.
Auto Threshold (MA 25e): Patient controlled Hughson Westlake
procedure according to ISO 8253-1.
Store Function (MA 25e): Soft key (F2-key) store button and internal
memory for AC L/R. Stored measurements can be
viewed on the build in display.
Modulation: Warble +/- 5% 5 Hz.