Installation & Operation Manual

Wilat_Op_Man_23Oct08.doc CONFIDENTIAL
Aearo Technologies Page 8 of 21 18/07/2007
2. Installation and set up
Note: This device should be installed, calibrated, and serviced only by special instrument service
representatives or others who possess the technical skills and equipment necessary to
safely and reliably perform those procedures.
The WiLAT system uses the following color coding to identify the audio channels;
 Red = Right phone
 Blue = Left phone
 Green = Bone conductor
2.1 Setting the input impedance
The WiLAT system must be configured to match the impedance of the audiometer:
1. Determine if the impedance of your audiometer is 10 (ten ohms) or 50.
Note: The WiLAT system is not designed to accommodate, and should not be connected to, an
audiometer with impedance requirements other than 10
 or 50  .
2. Unless specified otherwise, all WiLAT systems are shipped with a default setting of 50.
3. If your audiometer is 10, the installer must reset the WBU as follows:
3.1. Open the service door on the bottom of the WBU.
Locate the six (6) jumpers marked 10 OHM and 50 OHM (see Figure 2.1 below)
Figure 2.1
3.2 Place all six (6) jumpers at the impedance of the audiometer