Welch Allyn REF 29400 - Manual (Page 24)

Welch Allyn OAE Hearing Screener Directions for Use 705353 Rev E
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Chapter 7: System Operation
The front label of the Welch Allyn OAE Hearing Screener incorporates five buttons that the user
presses to turn on or reset the box and move through the possible program operations. Refer to
the figure and the instructions that follow it to understand the functions of each button. Other
sections of this chapter provide flow charts of the software.
Buttons and Their Function
Welch Allyn OAE Hearing Screener and Buttons
The ON button is used to power on the Welch Allyn OAE Hearing Screener when it is turned off.
It also acts as a reset button if pressed when the screener is already on. If the ON button is
pressed during any operation it will function as a reset, aborting the current process and returning
to the beginning of the Power ON sequence flow chart.
The RESTART button returns the Welch Allyn OAE Hearing Screener to the PERFORM DPOAE
message in preparation for performing another test or for viewing data from previous tests. By
pressing the RESTART button at any point during program operation, the current operation will be
aborted and the PERFORM DPOAE message will appear.
The DX SELECT button is used to initiate the procedure that is displayed on the LCD display. For
example, if the PERFORM DPOAE message is displayed, pressing the DX SELECT button
initiates a test sequence. Press the UP or DOWN arrow keys until the desired program function
appears in the LCD display. Then press the DX SELECT button.
Restart
Button
Up & Down
Arrows
DX Select
Button
ON
Button