Installation & Operation Manual

Wilat_Op_Man_23Oct08.doc CONFIDENTIAL
Aearo Technologies Page 18 of 21 18/07/2007
7. Precautions, Maintenance, and Troubleshooting
7.1 Interference with other wireless devices
The E-A-RTONE WiLAT System's operation can be affected by interference from other
electromagnetic radiators such as cell phones, WiFi and Bluetooth devices. Under these
potential, loss of signal conditions, the WiLAT could temporarily stop functioning as indicated by
the "No LINK" LED (10) on the WBU. Removing the source of interference will allow the system
to automatically return to normal function. Testing should be suspended anytime a “No Link”
condition exists until the link is reestablished. See section 7.6 below for additional details.
7.2 Severe mechanical shock
Although the E-A-RTONE WiLAT System has been designed to withstand the rigors of shipment
and normal clinical use, severe mechanical shock could damage components in the base or
remote units. If the WBU or WRU sustain severe mechanical shock that results in breakage of
the component’s plastic housing or failure of the system to operate normally, it should be returned
for evaluation and repair as specified in the Limited Warranty section of this manual.
7.3 Unauthorized modification
Changes or modifications to any part of this device, not expressly approved in writing by E-A-R
Auditory Systems, will void the manufacturer’s warranty and could void the user’s authority to
operate this equipment.
7.4 Device end of life disposal
After the WRU rechargeable battery has been removed, as described below in Section 8. of this
manual, it is the final user’s responsibility to discard this equipment into an approved, segregated
collection scheme to enable its suitable treatment/disposal, and to improve human/environmental
protection in accordance with applicable international, or U.S. federal, state, and local regulations.
7.5 WBU Overflow alert
The WiLAT system employs digital wireless communication wherein the signals from the
audiometer are digitized in the WBU. The WiLAT system is designed, as specified above in Table
3.2, to meet the maximum HL requirements of ANSI S3.6 2004 for Type 1 audiometers with an
insert earphone. If the audiometer exceeds those values, the digitizing system may enter an
overflow (“OVFLO”) condition resulting in severe degradation of the signal and prompting
the WBU OVFLO LED (12) to flash in conjunction with an audible alarm.
7.6 No Link Condition
If the wireless link between the WBU and WRU is lost, the “No Link” LED (10) on the WBU will
flash. After 15 seconds of failing to reestablish a link, the WRU will enter a low power mode and
will resume normal operation only when a link with the WBU is reestablished. During the low
power mode, the WRU’s “No Link” LED (10) will flash approximately every 7 seconds. When the
system is used in conjunction with a sound booth, the “No Link” condition can usually be avoided
by positioning the WBU antenna as close as possible to the booth window to maintain a “line-of-
sight” between the WBU antenna and the WRU. When the WBU cannot be positioned close to
the sound room window, an optional RF extension cable can be used to allow the antenna to
attach directly to the outside surface of the booth window.