Operation Manual MA 25/MA 25e
MA 27/MA 27e
8104818 Rev. 4
21
19/10/2017
5.1.3 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
10 minutes. For further information on use after transport and storage see section 4.2.2.
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.
5.2 Function Keys
Function keys are the buttons below the display. Function of the button is displayed on
the bottom of the display. These buttons are labeled
F1
,
F2
,
F3
and
F4
. See Figure 10
and Figure 11 (4) as well as Table 7 for the selections available for each function key
in the testing mode.
NOTE
: The function buttons are dependent upon the version obtained, MA 25/MA 25e
and MA 27/MA 27e.
Table 7 Explanation of Function Keys
Function-
key
MA 25/MA 27
MA 25e/MA 27e
F1
To select the
Right
ear.
To toggle between
Left
and
Right
ear.
F2
To select the
Left
ear.
To
Store
threshold.
F3
Pulse
– Pulse Off: Manual tone presentation; Pulse On: Pulsing Tone
will be presented when tone switch is pressed.
F4
Warble
– Warble Off: Pure tones will be presented.
Warble On: Warble tones will be presented.
5.3 MA 25e/MA 27e Special Functions
5.3.1 Talk Forward
Figure 12
On the MA 25e/MA 27e, Talk Forward is activated by holding down
the
Hearing Level dB
dial. Rotating the dial while in the talk-forward
mode will adjust the level of the talk-forward to the patient ().
5.3.2 Function Keys
Figure 13
The function key functionalities can be accessed by pressing the
Frequency Hz
dial (). For explanation of the function keys see
