MA 25 Operating Manual
7
3.
Function of buttons and display
Power On and Power Off
Attention: Power on is only possible if headphones are plugged-in!
To turn on the audiometer press the Tone Switch button.
To power off the audiometer press the level dialer and frequency dialer for a few seconds. The audiometer will also
automatically power off after 3, 4, 5 minutes (or not) depending on the settings.
Pure Tone Presentation
Frequency
: Turn the Frequency Hz dialer to select another frequency
Level
: Rotate the Hearing Level dB dialer to increase or decrease the level
Present tone
: Touch the Tone Switch
