Operation Manual MA 25/MA 25e
MA 27/MA 27e
5.2 Switching the Device On and Off
NOTE: All the cables and accessories have to be connected before the instrument is
switched on. Power on is only possible if headphones are completely plugged-in!
NOTE: The warm-up time for the device including boot up process takes about
1 minute. For further information on use after transport and storage see Section 6.1.
To turn on the audiometer press the Tone Switch button (Figure 10/Figure 11, 1).
To power off the audiometer press and hold the Hearing Level dB dial (2) and
Frequency Hz dial (3) for a few seconds or unplug the device.
5.3 Device Layout
Figure 10 and Figure 11 show the device layout. Table 6 gives further explanation.
Table 6 Explanation of Device Layout
Presenter mode: Press to present the signal. A tone
presentation signal (i.e. ) will display on the screen.
Interrupter mode: Press to stop the signal being
presented.
Dial to select hearing level of presented tone
between -10 dB HL and 100 dB HL.
Dial to select frequency of presented tone.
See section 5.4 for more details.
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