Installation & Operation Manual This Product is Listed by UNDERWRITERS LABORATORIES INC. and Bears the Mark: 3TEM “CE” Mark & WEEE (symbol) here UL60601-1, IEC60601-1, CAN/CSA C22.2 No. 601.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL Table of Contents 1. INTRODUCTION .....................................................................................................................................4 1.1. SYSTEM OVERVIEW ..........................................................................................................................5 1.2. FUNCTION IDENTIFICATION ................................................................................................................5 Table 1.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL 1. Introduction Congratulations on the purchase of your new E-A-R-TONE® WiLAT Audiometric Earphone System. The E-A-RTONE® WiLAT has been designed to replace the wired connection between an audiometer and its earphones, bone conduction oscillator, and patient response button with a wireless link.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL 1.1. System Overview The E-A-RTONE WiLAT system includes the following main components; 1. A Wireless Base Unit (WBU): connected via replaceable cables to each of the audiometer’s Left Phone, Right Phone, and Bone Conduction (BC) analog audio outputs, and to a User Response Button (URB) switch input. The WBU communicates with a patient worn wireless remote unit via a digital radio frequency (RF) link. 2.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL Table 1.2 WRU user functions and controls No Function Description 19 Right jack Output to the right insert phone 20 BC jack Output to the user provided bone conductor 21 Left jack Output to the left insert phone 22 ON/No Link LED Glows when the unit is ON. Flashes in No Link power down 23 Low BAT LED Glows when the battery is low.
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Wilat_Op_Man_23Oct08.doc CONFIDENTIAL 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; • • • 2.
Wilat_Op_Man_23Oct08.doc 2.2 CONFIDENTIAL Setting a Link ID The WiLAT system provides a point-to-point communications between the WBU and the WRU. If two or more WiLAT systems are used in the same facility, each system must be configured to a unique ID (address code). Unless specified otherwise, all WiLAT systems are shipped with the default address “0”. If you have more than one system in the same facility, the installer will need to assign a unique address code to each system. 1.
Wilat_Op_Man_23Oct08.doc 2.3 CONFIDENTIAL 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.
Wilat_Op_Man_23Oct08.doc 2.4 CONFIDENTIAL Installing the WRU Note: Italicized numbers enclosed in parenthesis refer to the respective component diagrams on Page 7 of this manual. 1. Following the color coding specified above, connect the three dual-pin transducer cords to the WRU audio outputs (19, 20, & 21). Note: The dual-pin audio cords must be connected both to the WRU and to each (Left/Blue, Right/Red, and BC/Green) transducer as described below.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL The instrumentation required includes a Type I Precision Sound Level Meter with 1/3 -1/1 octave band filters, appropriate condenser microphone, microphone cable, preamp adapter, and one or more audiometer “analyzer(s)”, each connected and calibrated according to the manufacturer’s specification. The metal nipple of the transducer case is connected directly or indirectly to the coupler depending on the type of coupler used (see Figures 3.1 and 3.2).
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL 3.2 Calibration for Speech Audiometry ANSI S3.6-2004 specifies the 1 kHz reference-tone level for the speech circuit as 12.5dB above the 1 kHz pure-tone reference test threshold for the earphone in question. Calibration of the E-AR-TONE® Insert earphone for speech is thus performed by setting a 1kHz signal at 0 VU through the speech circuit, setting the attenuator to 60 dBHL, and adjusting for 72.5 (60.0 + 12.5) dB SPL in the 2cc coupler. A range of 69.5 to 75.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL Table 4.1 Summary of channel mode selection Press Center (17) Left (18) Right (16) LED indicators Left (15) Center (14) Right (13) z z z z z z z z z Mode Ear tested AC L&R BC/LM BC/RM Left &/or Right AC Right BC Left BC Caution: During testing, cell phones in and around the test room must be turned off, or placed at least 6 feet away from the WBU. Patients wearing the WRU should turn off their cell phones. 4.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL Full Insertion Shallow Insertion Figure 4.2 Proper insertion depth is necessary to achieve maximum ambient noise attenuation and interaural attenuation. Table 4.2 below depicts interaural attenuation as a function of insertion depth. The described interaural attenuation is obtained for each ear in which the E-A-RLINK is fully inserted, regardless of whether it is the “sending” ear or the “receiving” ear. Table 4.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL 5. Background Noise Reduction A major benefit of the E-A-RTONE Insert Earphone in combination with the E-A-RLINK disposable foam eartips is the reduction of background noise that may adversely affect threshold determination. When E-A-RLINK eartips are appropriately selected and fitted to the test subject, the expected noise attenuation will typically exceed 30 dB in the frequency region 125-8000 Hz.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL 6. WRU Power management The WRU is powered by a Li-Ion rechargeable battery. When the battery is fully charged, the WRU will operate for approximately 10 hours of testing. The WRU should be charged over night in preparation for the next day’s testing.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL 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.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL Note: The WiLAT nominal operating range of 20 feet will vary, depending on the room characteristics, facility construction, and the size and proximity of metal objects relative to the WRU and WBU components. 8. Replacing the WRU battery Note: Replacement of the WRU rechargeable battery requires opening the plastic housing and removal of circuit boards.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL 9. Specifications Power Supply (WRU) Battery Pack Full Charge Operation Full Recharge Time Abbreviated Charge Time Battery Charger 3.7V Li-Ion 10 hours run time ≈4 hours ≈15 min. Input 110VAC/4.2VDC 60 Hz Power Supply (WBU) AC/DC Adaptor (supplied) Input: 100 - 240VAC, 50 - 60Hz Output: 12VDC/1.5A Energy Star Compliant Level IV Physical Characteristics Nominal Weight - WRU (w battery) 3.0 ozs.
Wilat_Op_Man_23Oct08.doc CONFIDENTIAL 10. Limited Warranty Aearo Technologies warrants each E-A-RTONE WiLAT system it manufactures to be free from defects in material and workmanship under normal use for a period of twelve (12) months from the date of sale to the original purchaser.
