FONIX® 8000 - Frye Electronics

Automated Test Sequences 103
3. Use [F8] to save the setting (and all other settings in the Setup Menus) as
default selections. See Sections 2.2.1 and 2.2.4 for details.
4. Press [EXIT] to return to the Opening screen. Your new selection for the
F4-F7 keys should be displayed in the function key list at the bottom of the
screen.
5. Press the function key you selected in Step 2 to enter the ANSI screen.
When inside the ANSI screen, the [EXIT] button is used to leave the screen.
This will take you to the ANSI navigation screen, which contains function keys
selections pointing to all of the available ANSI S3.22 test selections. Use one of
those function keys to enter a different ANSI test screen, or press [EXIT] again
to return to the Opening screen.
5.1.2 Leveling for ANSI
Before you run an ANSI test, you should make sure the sound chamber is leveled.
Even if the screen says that the chamber is leveled, it is a good idea to
periodically re-level it to account for any differences that might have entered
into the testing environment.
The ANSI standard requires that you do a special leveling that accounts for
everything that will be in the chamber during the test. (For most practical office
settings, the leveling procedure explained in Section 3.2 is adequate. If you
are using the 8120 Polar Plot Chamber, you will need to place the 8120 basket
cover over the cavity inside the chamber.
1. Place the dummy microphone (a black cylinder, provided when ANSI
Option is ordered) into the coupler.
2. Attach the hearing aid to the coupler in the way appropriate for the type of
aid under test. See Section 3.3.
3. Position the hearing aid/coupler assembly in the test chamber with the
microphone of the aid at the reference point of the chamber.
4. Place the test microphone as close as practical to the hearing aid microphone
(3-5 mm). See Figure 5.1.2A.
Figure 5.1.2A—Setup for leveling