| Reply #1
ullix
Germany
1107 Posts |
 Posted - 04/07/2018 : 07:51:30
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It will certainly be wrong if you have zero counts. Expect something beyond 10 CPM, most likely less than 30CPM (if you lived in an area with higher background, you would probably know)
There are may ways these Geiger counters can fail. Since this happened after a longer time of no use, and the batteries are ok (?), chances are the tube is broken. Open the case (careful, high voltage at the tube contacts!) and look at the tube: there should be a faint rainbow shine inside the glass tube (from a vaporized metal deposit). If this is absent, in particular when you see a powdery appearance instead, then most likely the tube is cracked, air came into the tube, and the metal vapor deposit became oxidized. A new tube is needed.
If that is ok, electronic defects are the likely cause; repair is needed.
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Edited by - ullix on 04/07/2018 07:52:32 |
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Showing No counts with GMC 300.. what to do??
