CHAPTER THIRTEEN
Quality checks
100
Quality checks
On selection of
Probe Test
the message
Place Probe into Otodynamics
Test Cavity. Press OK to begin test.
will be displayed.
Remove the tip from the probe and place the cavity on a flat surface. Insert
the probe into the test cavity at a 90 degree angle to the top of the cavity,
between the screws, as shown below left. Press the probe firmly into the
cavity until the shoulder of the probe touches the top of the cavity. When
released, the probe will rise a little to its natural position and the shoulder
may no longer touch the cavity. Inserting the probe at the wrong angle
or with the probe head over one of the screws may result in incorrect test
results.
Select
OK
to begin the
Probe Test
or
Cancel
to return to the
Probe Menu
screen.
The probe outputs sound at 1, 2 and 4kHz via its loud speaker. The
Otocheck compares the response at each frequency against an absolute
range and probe specific values stored on the probe connected.
Checking the probe response against the absolute range determines if
the probe is OK for use. Checking the probe response against the probe
specific values is more sensitive and provides a warning if the response of
the probe has changed.