Bio-Rad Personal Molecular Imager™ (PMI™) System - Manual (Page 26)

Cleaning Protocol for the Imaging Screen-K/Tritium
Caution: The phosphor matrix of the tritium screen has no protective barrier and should
NOT be cleaned with or exposed to any liquids.
Any particulate matter should be gently removed with a soft, dry brush or gentle dry gas
stream. The screen should be used only with H³, any other isotope will contaminate the
screen.
5.2.4 Storage of the Imaging Screens
Always erase the screen prior to storage. The surface of the screen should be completely
protected. Do not place heavy objects on top the imaging screen. With proper care the
imaging screen should maintain its performance through years of use.
Always store the screen "flat" in an exposure cassette, in the original shipping box or storage
bag.
5.3 Exposure Cassette Maintenance
These devices do not require regular maintenance other than regular cleaning to remove
any residue or possible radioactive contamination. To clean, wipe with a lint-free paper
towel moistened with a mild detergent solution such as Bio-Rad's Cleaning Concentrate
(catalog #161-0722) that has been diluted 1 in 20 with distilled water.
5.4 Screen Eraser Maintenance
The white plastic filter requires occasional cleaning to remove accumulated dust from its
surface. To clean the filter, gently wipe with moist, lint-free paper or a soft cloth. Do not use
abrasive cleaning solutions, as they will scratch the filter.
5.4.1 Changing Bulbs
To order replacement bulbs (catalog #170-7869) contact either Bio-Rad Laboratories or
your local distributor.
The Screen Eraser uses four 15 W fluorescent light bulbs. To replace a light bulb, use the
following procedure.
1. Identify the defective light bulb.
2. Turn off the eraser.
3. Wait five minutes for the bulbs to cool.
4. Unplug the power cable.
5. Open the four hex screws on the front of the eraser, using the hex tool stored on the
rear panel of the unit.
6. Remove the white plastic filter.
7. Remove the foam on both sides and replace the defective bulb.
8. Reassemble by reversing steps 4 to 7.
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