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User & Service Manual

Xltek EMU 128 Headbox

Digital Board

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How the Digital Board Works ..........................................................................23

Servicing .................................................................................................................... 24

Problems Starting a Study

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Problems with Signal Quality

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Run a Channel Test ........................................................................................24

Disassembly

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Adjustments

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Getting Help....................................................................................................... 26

To open the EMU128 Headbox Tutorial: .........................................................26

Содержание XLTEK EMU128

Страница 1: ...XLTEK EMU128 User and Service Manual...

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Страница 3: ...correct and complete Excel Tech Ltd shall not be liable for errors contained herein nor for incidental or consequential damages in connection with the furnishing performance or use of this material A...

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Страница 5: ...nings and Cautions 9 Assembly Instructions 10 Hardware Connections 10 Testing the EMU128 Headbox 12 EMU128 Headbox Calibration and Verification 12 Channel Test 13 Channel Test Signal Control 13 Allowa...

Страница 6: ...adbox 4 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 26 To...

Страница 7: ...e that you are looking for Summary of XLTEK EMU128 Features Flexible setup Flexible configuration Four 32 channel breakout boxes 32 64 96 128 channel setups Two trigger inputs Connects to XLTEK s desk...

Страница 8: ...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 Fuse R...

Страница 9: ...60dB Digital Specifications Sampling Frequency Standard EMU128 250 or 500 Hz user selectable Sampling Frequency Advanced EMU128FS 250 500 1000 2000 Hz user selectable Sampling Resolution EEG channels...

Страница 10: ...he presence of a flammable anesthetic mixture with air oxygen or nitrous oxide The accessories of this device may include several kinds of disposable sterile needle electrodes These needles are labele...

Страница 11: ...t Related Warnings and Cautions Disconnect the patient s recording electrodes from the system before your turn it on and off Disconnecting the electrodes prevents shock Connect all patient electrodes...

Страница 12: ...box cable 3 If provided insert the patient event switch into the Patient Event Switch jack 2 4 Connect the headbox to the breakout box with the required number of cables Ensure that the cables are plu...

Страница 13: ...set is found on the headbox Connect the reference electrode from the patient to the reference jack on either the headbox or breakout box Likewise connect the common electrode from the patient to the...

Страница 14: ...Connect the EMU128 Headbox to the acquisition station then connect the acquisition station to an XLTEK DT computer Turn on the system 2 Start XLTEK Database XLDB 3 To start a new study click New 4 Cho...

Страница 15: ...The Edit Settings window appears 2 To open the Acquisition dialog box click the Acquisition tab 3 Select Common in the Reference Electrode list box and click OK 4 To start the channel test open the C...

Страница 16: ...y of 500Hz Shape Sine or Square Amplitude Sine wave amplitude can be 79 158 316 632 1264 2527 5 5055 and 10110 V peak to peak Square wave amplitude can be 50 100 200 400 800 1600 3200 and 6400 V peak...

Страница 17: ...ge and wear Inspect cables for bent pins Replace frayed or worn cables Also regularly inspect and clean all system components including Connectors and jack ports Headbox and headbox cable Breakout box...

Страница 18: ...using a short circuit and will develop an artifact Unplug any other devices on the same circuit such as printers mechanical beds vacuum cleaners or other potential sources of interference Install a me...

Страница 19: ...rks 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 5 Click a top...

Страница 20: ...o apply a stimulus from an external stimulator to any pair of electrodes Maintains continuous signal monitoring while relay closures connect the stimulus to the selected electrode pair Components of t...

Страница 21: ...he channel numbering on this and other boards is not the same as the EEG channel numbering D Analog Board Qty 4 Handles amplification and DC removal for 32 channels Amplifiers are designed to handle s...

Страница 22: ...rator for DC removal This is equivalent to AC coupling but achieves a very low cutoff frequency without needing a large value of capacitance The Reference signal REFIN is applied to non inverting ampl...

Страница 23: ...plies the logic level to drivers U14 and U15 for generating individual differential drives to the four Digital PCBs Diode D2 is for protection only R17 terminates the twisted pair in its characteristi...

Страница 24: ...ON sets a path sheet 3 for the Channel Test signal from the Digital PCB to do an end to end verification of amplifier operation IMPON makes the path for VSIG to supply a current to channel inputs for...

Страница 25: ...Sheet 10 shows the power supply section T1 is populated for EMU128 It is a miniature ferrite transformer that steps down the 12 VAC 40KHz provided by the Headbox Interface Card in the computer Positi...

Страница 26: ...down from the general to the specific For example 1 Inspect the cables and connectors 2 To make sure the problem is in the headbox not the computer connect another EMU128 or an EEG32 to the NeuroWorks...

Страница 27: ...the channel numbers on the schematics do not correspond to the channel numbers on the screen To determine the affected channel touch a small wire to the pins of the 37 pin D connector one at a time an...

Страница 28: ...1 Close all applications 2 Click the Start button on the Windows taskbar 3 Choose Shut Down from the Start menu 4 Select Restart the computer and click Yes Step 4 Shut Down the Computer Sometimes you...

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Страница 32: ...829 5304 www natus com P N 103727 D 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 pro...

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