Interacoustics AC40 Instructions For Use Manual page 46

AC40 Instructions for Use - US Page 42
13. With the audiometer turned off insert the thumb drive into any available USB port
14. Turn on the instrument and push the Temp/Setup Button from the Tone test screen
15. Enter "Common Settings" using the Setup/Tests Button
16. For the question "Do you want to install" press the "Yes" button
17. After installation is completed, press the "Back" button to get to the testing screen