Installation & Operation Manual

Wilat_Op_Man_23Oct08.doc CONFIDENTIAL
Aearo Technologies Page 10 of 21 18/07/2007
2.3 Installing the WBU
Note: Italicized numbers enclosed in parenthesis refer to the respective component diagrams on
Page 7 of this manual.
When connected to the audiometer, the appropriate placement of the WBU will be limited by the
length of the cables, the integrity of the RF link between it and the WRU, and by the examiner’s
preferred access to the LED indicators and channel selection buttons. Optimal results will be
obtained with the WBU is;
 positioned on either side of the audiometer, or
 if the audiometer’s design allows, placed on top of the audiometer, or
 attached to the outside of the test booth, or other vertical surface using the keyhole-
shaped insets on the bottom of the unit over securely driven screws spaced 4.5” apart.
Vertical placement will not affect the performance of the device.
Note: If necessary, the WBU may alternatively be placed on the floor, directly below the
audiometer, however that arrangement may require an optional antenna
extension to preserve the RF link between the WBU and the patient-worn WRU.
1. Attach the antenna to the antenna jack (2)
1.1. If the WBU cannot be placed with the antenna in front of the window of the sound booth,
connect the optional RF extension cord to the antenna jack and the antenna to the other
side of the cord. Then attach the antenna to the window of the sound booth.
2. Connect the audiometer’s audio outputs to the audio inputs of the WBU (5, 6, & 7) using the
audio cords provided (¼” mono connectors on both ends) follow color coding on cords and
jacks.
Note: Both the LEFT and RIGHT channels of the audiometer must be connected to the WBU.
Connecting only one of the channels may reduce the system’s performance.
3. Connect the URB cord to the URB jack (4)
4. Verify the ON/OFF switch is in the OFF position and connect the AC/DC adaptor to the power
jack (1). Plug the AC/DC adaptor to 110 VAC wall outlet.
Note: To insure proper performance and safety, use only the manufacturer supplied, original, or
replacement adapter.
5. Turn the ON/OFF switch to ON. All LEDs will glow momentarily. After the startup sequence,
the RED, BLUE, and ORANGE LEDs will glow steady and the YELLOW “No Link” LED will
flash. The “No Link” LED will turn off automatically when the WBU is installed and activated.