Service manual

LUMISCAN ACR-2000 SERVICE MANUAL – SECTION 6.0 PERIODIC MAINTENANCE
6-1
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6.0 PERIODIC MAINTENANCE
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System Maintenance is classified in four categories, Daily Maintenance, Routine
Maintenance, Periodic Cleaning and Periodic Gain Check. Daily Maintenance and Routine
Maintenance are normally performed by the system operator and Periodic Cleaning and
Periodic Gain Check are performed by a trained service engineer.
6.1 Daily Maintenance
6.1.1 Clean input guide and output tray with anti-static guard spray daily.
6.1.2 Cover unit at night with lint free cloth or ESD safe plastic sheet.
6.1.3 Clean the storage phosphor screens every day, or every 10 scans.
The physical process by which storage phosphor screens produce CR images does not
change over time. The lifetime of the screens, however, is dependent on how they are
handled and maintained. Careful handling and proper cleaning of the screens and
cassettes will extend their usable lifetime.
Screens should be cleaned after every ten uses. For very high volume facilities, this will
mean cleaning the screens at least once, if not twice, a day. Even in low volume
facilities, screens must be cleaned once a week. Because they accumulate natural
radiation, all screens should be erased once a week.
Clean the screens with a lint-free cloth (for example, KayPees towels). Paper towels,
tissue, gauze, or towels should not be used to clean the screens because they leave lint
and fibers behind.
Ethyl alcohol, in particular anhydrous denatured ethanol, is recommended for screen
cleaning. Apply a generous amount directly to the phosphorous side of the screen and
wipe softly and evenly. Also clean the rear side.
Make sure the screen is dry before reloading it into the cassette (allow at least 10
minutes for the solvents to evaporate). It is best to clean the screens at the end of the
day so that they will be ready to use the next morning.
Ethyl alcohol and lint-free towels are available from Daigger (www.daigger.com or 800-
621-7193). Specially denatured anhydrous ethyl alcohol can be purchased in 500 mL
(cat # CX1226A) or 4L (cat # CX1226B) quantities. KayPees disposable paper towels
come in cases of 500 (cat #CX5661).
Screens should not be left in the eraser for extended periods of time. Once the screen is
erased, it should be removed from the eraser.