GE Typhoon 9200, Руководство по эксплуатации

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Typhoon Operating Instructions 28-9623-56 AA
35
Operation 4
Preparations before start 4.3
c) Provide enough time to register the contamination as an image on the screen.
d) After storage, scan the screen (see Section 4.4 Performing a scanning‚ on
page 39 ) and examine the image.
• If contamination is still present, clean and erase the screen again and re-
check for contamination.
• If no contamination appear on the image the screens is ready to use.
Storage phosphor screen
exposure
Note: This section is valid only when performing Storage phosphor screen
autoradioagraphy.
Recommendations for storage phosphor screen exposures
• Use an Exposure cassette to expose the screen to the sample.
• Expose thick samples, such as wet gels or TLC plates which are too thick to fit in
an Exposure cassette, together with a screen in a light-tight drawer or similar.
• To expose multiple samples on the same screen, make sure the samples have the
same thickness.
• It is important to place the screen on the sample correctly the first time. Adjusting
the position of the screen can result in a double exposure.
• If you must adjust the position, remove the screen and erase it.
Exposure procedure
1 Select the Exposure cassette size and style that matches the Storage phosphor
screen you want to use with the sample, see
Appendix A.2 .
2 Use a damp cloth to clean the grid surface inside the Exposure cassette and
remove any radioactive contamination.
NOTICE
Do not put uncovered wet gels in an Exposure cassette.