Testing The Tympanometer Functionality; Pressure Test - Interacoustics AT235 Service Manual

Service Manual
AT235
5

Testing the Tympanometer Functionality

This chapter explains how to test the tympanometer.
5.1

Pressure test

Test maximum pressure limit (red dotted line)
Verify that the actual pressure does not cross the red dotted line at 600 daPa.
While at the current pressure, watch the pressure value in the bottom of the pressure test view. Make sure that the
pressure does not drop more than 5 daPa (0.5 daPa/sec) during the next 10 seconds.
Release pressure by manually removing the probe from its cavity.
Set target pressure to -1000 daPa and verify that the actual pressure does not drop below the red dotted line at -
800 daPa.
While at the current pressure, watch the pressure value in the bottom of the pressure test view. Make sure that the
pressure does not drop more than 5 daPa (0.5 daPa/sec) during the next 10 seconds.
Release pressure by manually removing the probe from its cavity.
Test minimum pressure limit (green dotted line)
Place the probe in a 2ml hard wall cavity and select the slowest pump speed. Set target pressure to 1000 daPa
and verify that the actual pressure does not cross the green dotted line at 500 daPa.
Set target pressure to -1000 daPa and verify that the actual pressure does not drop below the green dotted line at
-700 daPa.
Select Test and then Pressure Test.
Place the probe in the 2cc cavity.
Fig. 34
Reading
the graphic
________
.. represents the criteria chosen
with the slider and selected with
'Go to target'.
________
.. represents the actual
values of the chosen criteria.
.... .... ....
.. represent the maximum and
minimum required pressure
levels.
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