AT235 Instructions for Use - EN Page 14
3.1 Handling and selection of ear tips
When using the AT235 probe and CIR55 contra phone, Sanibel ear tips must be used.
The Sanibel ear tips are single use only and should not be reused. Reuse of ear tips can lead to the spread
of infection from patient to patient.
The probe and CIR55 contra phone must be fitted with an ear tip of a suitable type and size before testing.
Your choice will depend on the size and shape of the ear canal and ear. Your choice may also depend on
personal preference and the way you perform your test.
When performing a quick impedance screening test you may choose an umbrella shaped ear
tip. Umbrella ear tips seal the ear canal without the probe tip going into the ear canal. Press
the ear tip firmly into the ear canal in such a way that a seal remains during the complete test.
For more stable testing, we recommend using an extension cord with a mushroom shaped
ear tip. Make sure that this ear tip inserts completely into the ear canal. Mushroom shaped
ear tips allow you to test ‘hands free’ from the AT235. This reduces the chance of contact
noise disturbing the measurement.
Refer to the “Selecting the Correct Ear Tip” Quick Guide included in the AT235 Additional Information
document for an overview of ear tip sizes and selection.
3.2 Switching the AT235 on and off
Switch the AT235 on or off by pressing the ON (1).
NOTICE
The AT235 takes approximately 45 seconds to boot up. Allow the unit to warm up for 1 minute before use.
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