natus XLTEK EMU128 User And Service Manual
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natus XLTEK EMU128 User And Service Manual

natus XLTEK EMU128 User And Service Manual

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XLTEK EMU128
User and Service Manual

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Summary of Contents for natus XLTEK EMU128

  • Page 1 XLTEK EMU128 User and Service Manual...

  • Page 3: Publisher's Notice

    Natus Medical Incorporated Excel-Tech Ltd. (XLTEK) 2568 Bristol Circle Oakville, Ontario, L6H 5S1 Canada Toll Free: (800) 387-7516 or Fax: (888) 404-2992 Local Tel: (905) 829-5300 or Fax: (905) 829-5304 Natus Sales and Support: 800-303-0306 Email: Oakville_Techincal_Service@xltek.com ots@natus.com Website: www.natus.com...

  • Page 5: Table Of Contents

    User & Service Manual Table of Contents Publisher’s Notice .....................1 Part Number: 103727 REV D ................1 About the Xltek EMU128 Headbox..............5 EMU 128 Headbox Specifications..............5 Classifications ......................5 EMU128 Specifications (Continued)................7 Analog Specifications - EEG Channels .............7 Digital Specifications ..................7...
  • Page 6 User & Service Manual Xltek EMU 128 Headbox Digital Board ....................23 How the Digital Board Works ................23 Servicing ........................24 Problems Starting a Study ................24 Problems with Signal Quality................24 Run a Channel Test ..................24 Disassembly..................... 25 Adjustments..................... 25 Getting Help.......................

  • Page 7: About The Xltek Emu128 Headbox

    Xltek EMU128 Headbox User & Service Manual About the Xltek EMU128 Headbox The XLTEK EMU128 package, designed specifically for epilepsy monitoring, allows for flexibility in set up and configuration. Four X 32 channel input boxes can be connected to the EMU128. The EMU128 permits single or multiple channel configurations including grid electrodes up to 128 channels.
  • Page 8 User & Service Manual Xltek EMU 128 Headbox Transport and storage Atmospheric Pressure: 500 hPa – 1060 hPa Altitude: up to 4600m above sea level Atmospheric Pressure: 700 hPa – 1060 hPa Thermal Gradient: 20° C/hour max North America Power Input: from Desktop Computer equipped with Excel Tech Headbox Interface Card (ISA card) or XLTEK NeuroWorks.

  • Page 9: Emu128 Specifications (Continued)

    Xltek EMU128 Headbox User & Service Manual EMU128 Specifications (Continued) Analog Specifications - EEG Channels EEG Channels Up to 128 acquisition channels plus 1 reference channel Reference Channels User Selectable: External, Common Differential Input Impedance N/A. Inputs are not differential.

  • Page 10: Warnings And Cautions

    User & Service Manual Xltek EMU 128 Headbox Warnings and Cautions General Warnings Proper use of this device depends on careful reading of all instructions and labels that come with or on the system. Inaccurate Measures may be caused by incorrect application or use.

  • Page 11: Patient-Related Warnings And Cautions

    Xltek EMU128 Headbox User & Service Manual The system uses a three-wire power cord with a hospital grade plug. The system is earth grounded. For grounding reliability, only connect the device to a hospital grade or hospital-only receptacle. Inspect the power cord often for fraying or other damage.

  • Page 12: Assembly Instructions

    User & Service Manual Xltek EMU 128 Headbox Assembly Instructions Hardware Connections 1. Unpack the headbox and headbox cable. 2. Connect the cable between the headbox data port (labeled Connect to computer) and the acquisition system (a desktop computer or NeuroWorks Acquisition System).
  • Page 13 Xltek EMU128 Headbox User & Service Manual 5. A Reference electrode and Common electrode are required for a successful recording. With this headbox system, there are two sets of ground (common) and reference electrode ports: one set is found on the breakout box and one set is found on the headbox.

  • Page 14: Testing The Emu128 Headbox

    User & Service Manual Xltek EMU 128 Headbox Testing the EMU128 Headbox The EMU128 Headbox hardware is: Fully assembled, tested and calibrated prior to being shipped to you. • Designed to work with XLTEK NeuroWorks software. • The following sections describe how to use NeuroWorks with the EMU128 Headbox to perform a channel test.

  • Page 15: Channel Test

    Xltek EMU128 Headbox User & Service Manual Channel Test While in the NeuroWorks live recording screen, a channel test may be performed to verify the integrity of the signal processing from the amplifier input through to the display. A channel test applies a test signal to all channels. This allows you to examine the waveforms on the screen to see if all of the channels are functioning.

  • Page 16: Allowable Channel Test Signal Settings

    User & Service Manual Xltek EMU 128 Headbox Allowable Channel Test Signal Settings (At a sampling frequency of 500Hz) Sine or Square Shape Amplitude Sine wave amplitude can be 79, 158, 316, 632, 1264, 2527.5, 5055 and 10110 µV peak to peak. Square wave amplitude can be 50, 100, 200, 400, 800, 1600, 3200, and 6400 µV peak to peak.

  • Page 17: Maintenance

    Xltek EMU128 Headbox User & Service Manual Maintenance To keep the EMU128 Headbox system in good working condition, follow a regular schedule of preventive maintenance. Regular preventive maintenance does not involve access to the interior of the EMU128 Headbox and components. For service problems that require corrective maintenance and/or internal component service, call XLTEK’s...

  • Page 18: Troubleshooting

    User & Service Manual Xltek EMU 128 Headbox Troubleshooting If the acquired waveforms are flat, do not appear, or do not appear correctly (or as expected), try shutting down the computer for at least 10 seconds, and then set up the test again from the beginning.

  • Page 19: Opening The Troubleshooting Section Of The Online Help

    Xltek EMU128 Headbox User & Service Manual Opening the Troubleshooting Section of the Online Help 1. In NeuroWorks, choose Help > XLTEK NeuroWorks EEG Help. 2. Click the Contents tab. 3. Double-click NeuroWorks. 4. Double-click the Troubleshooting book. The Troubleshooting book expands to show the contents.

  • Page 20: Theory Of Operation

    Xltek EMU128 Headbox User & Service Manual Theory of Operation Introduction This section describes the theory of operation of the 128-channel EEG, Model EMU128-S. The initial discussion is primarily signal-flow oriented. Detailed board-level theory is provided later in this section.
  • Page 21 Xltek EMU128 Headbox User & Service Manual Circuit Board Assemblies Inside the Headbox: (Block Diagram) A. Analog Back Plane Board (Qty. 1) A 4 MHz crystal oscillator supplies the reference clock to all the Digital Boards. • A 129 channel, non-digitized Reference amplifier allows the user to quickly plug •...

  • Page 22: Board-Level Theory

    User & Service Manual Xltek EMU 128 Headbox Board-Level Theory Analog Back Plane (Schematic diagram SD-102196 Rev B1) U1 is a dual phase-locked loop chip, of which only the oscillator portion is used. The frequency is established by quartz crystal Y1. The output from pin 7 is filtered to an almost pure 4 MHz sine wave by parallel-resonant circuit C1, L1.

  • Page 23: Digital Motherboard

    Xltek EMU128 Headbox User & Service Manual Digital Motherboard (Schematic diagram SD-102194 Rev D3) J7 is the connector for plugging in the cable to the computer. U1 converts the +12V to +5V for powering the rest of the chips on this board. VPW1 and VPW2 are the two wires of a 12VAC 40KHz power source on the XLTEK Headbox Interface Card in the computer.

  • Page 24: Analog Board

    User & Service Manual Xltek EMU 128 Headbox R33/C11/D1 delays enabling the outputs until the Digital PCB clears any random setting at power up. No more than two relays are supposed to be energized at a time. Analog Board (Schematic diagram SD-101315 Rev D3) Sheet 1 shows the connectors.

  • Page 25: Digital Board

    Xltek EMU128 Headbox User & Service Manual Digital Board (Schematic diagram SD-102817 Rev D2) Sheet 2 shows the connectors. J1 brings in the amplified EEG signals from the Analog Board and communicates the • serial data to its shift registers.

  • Page 26: Servicing

    User & Service Manual Xltek EMU 128 Headbox simultaneously, but only one Digital Board at a time sends data to the computer. This is fundamental to serial communication. Signals HSFS, HSSCK and HSSDAT are used (U11-18, U19-11, U19-8). If a sine or square wave Channel Test signal is commanded, the PIC writes a scaled value from a lookup table to Digital-to-Analog Converter (DAC) U18 at each sample time (signals DADAT, DALD, DASTB).

  • Page 27: Disassembly

    Xltek EMU128 Headbox User & Service Manual 3. Point to the first menu on the Channel Test control bar and click Sine or Square. The Sine wave setting is good for general use. A low-frequency Square wave setting can reveal problems in the integrator of the DC removal stages on the Analog Board.

  • Page 28: Getting Help

    User & Service Manual Xltek EMU 128 Headbox Getting Help XLTEK is committed to providing you with support so you can operate the EMU128 Headbox with ease and confidence. If you need help, follow these steps to find a solution: Step 1: Document the Incident Carefully document the incident.
  • Page 32 A Total Service Solution Natus Systems are backed by a comprehensive and extendable warranty. Our support team is available around-the-clock. Our technical staff provides phone and remote PC support, while our nationwide network of service engineers can be dispatched quickly when required.

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