Manual de instrucciones de Hitachi McDATA Sphereon 4500

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HITACHI 4500-Il INSTRUCTIONS

The following instructions provide a guide to performing simple tasks on the microscope. Initial sections
(A to D) describe how to insert a sample and obtain an image. Subsequent sections provide information
on more COni~!CX operations such as changing the accelerating voltage or the detecton Sections K and
L provide infonnation on what to do at the end of a session.

Compared with the JEOL 840 SEM there are more variable parameters available to the operator.

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8. Press EVAC on SC AIRLOCK VALVE DISPLAY - this will pump the specimen exchange chamber. 9. Observe SEC vacuum display as status lights show vacuum goes from AIR to LOW to HIGH. 10. When SEC vacuum is FilCH (green light is on), open airlock door, by turning airlock level anticlockwise about one half turn. DO NOT FORCE THIS LEVER, it requires minimal effort to open. 11. When airlock door is open, fully insert specimen exchange rod into specimen chamber. Watch the specimen being inserte

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D. TAKING A PHOTOGRAPH 1. Obtain the image you desire. 2. Press ABC button on the image adjust section to automatically alter brightness and contrast to the correct levels for the camera. 3. Press DIRECT switch on the photographic control section. 4. Wait for the line scan to perform on cycle and expose the film. Exposure is complete when the light on the DIRECT switch goes off. 5. Withdraw the film from the cassette. WHAT TO DO WHEN IT ALL GOES DARK - DON'T PANIC: DON'T FIDDLE WI

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10. Hit ENTER to move $ sign against STIG ALIGN Y Press ENTER again 11. The image will oscillate on the screen, minimise oscillation with ALIGNMENT X and Y knobs. 12. Press PF16 EXIT to finish. G. CHANGING THE DETECTOR The 4500 has two secondary electron detectors, an upper detector which sits above the specimen and a lower detector which sits to the side of the specimen. Each detector provides a different perspective of the specimen. To change the detector: 1. Press PF2 COLUMN CON

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I. LOW MAGNIFICATION MODE Often it can be difficult to locate the area you want on a specimen. In this case use Low Magnification Imaging, here the lowest magnification is x20. 1. Press LOW MAG switch on display panel (the green light in the switch will glow). This will automatically set the magnification to x500. 2. Alter magnification using MAGNIFICATION knob to required level. Using X and V controls to obtain area of interest. 3. Turn off low magnification mode by pressing LOW MAG

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L. FINISHING A SESSION 1. Turn the SC AIRLOCK VALVE from AUTO (OPEN) to CLOSED - the green light on the HV off/ready display will turn off.. 2. Turn off the visual display by turning DISPLAY POWER to O. 3. Fill in log book.