Page 6 OM024-6 Model 240 Operating Manual
3 Using the Audiometer
3.1 Switching the audiometer on and off
Press and briefly hold the switch marked (located on the back panel).
No warm-up time is required. The display will briefly show the model and
the type of headphone currently in use.
If a secondary headphone has been enabled (e.g. E-5A) it will then be
necessary to select the required headphone as follows:
Either - press YES to confirm the current headphone selection
Or - press NO to toggle to the other option and then YES to confirm
the selection
Note: headphone selection must be confirmed before any other
operation can be performed.
The display will then be similar to that shown in Section 3.3.
To switch off, press the switch marked again, or press and hold the
MENU key followed by the YES (RIGHT) key and then release both.
3.2 Testing the patient response switch
Press the patient response switch and the light labelled RESPONSE
(above and to the right of the display) will illuminate green.
3.3 Audiometer display
On start-up the display will show the following default setting:-
SIGNAL dBHL FREQUENCY Hz MASKING dBHL
This indicates that when the PRESENT key is pressed, a tone will be
presented at 30dBHL at a frequency of 1kHz (1000Hz) to the designated
ear. On start up the audiometer defaults to the left ear.
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