SPURIOUS COUNTS FROM STATIC PROBLEMS
SUGGESTIONS FOR A CLIENT IN ISRAEL
Static can and usually does cause spurious counts by activating the phosphor inside the cell. The solution usually is as simple as using a static spray on the PVC parts of the chamber. Purchase a good static spray at one of the chemical spray manufacturers. EN/Stat #MS-966 by Miller-Stephenson Chemecial Co. Inc, Danbury, CT, U.S.A. (Phone 203-743-4447) is an excellent static spray. You may also be able to find a static spray in at a TV supply store, however, I know that this one works and does not cause other problems, such as melting the foam or PVC.
1) Remove the foam from the top of the chamber cap and spray both the foam and the inside and outside of the PVC chamber cap.
2) Let the foam and the PVC chamber cap dry thoroughly and then reassemble.
3) Don't forget to spray the chamber extension and its foam insert as well.
4) This spray job will last you for a long time, you may only have to do this once or twice a year, however long it takes to wear off the coating, through handling.
5) Make sure that the foam is not holding the chamber cap from completely seating on to the aluminum lower section.
6) If the foam is keeping the PVC cap from seating you will let in some light and you might have to either adjust the foam thickness by re-seating or carefully trimming the foam.
7) Please inspect your chamber and cap fit before you make modifications..
8) Do not hesitate to E-mail me if you have further questions.
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