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 2.GQ Geiger Muller Counter
 Gmc 320 V5 High Background Readings		  New Topic  Reply to Topic
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Boyalon

Ukraine
2 Posts
Posted - 08/27/2019 :  00:55:31  Show Profile  Reply with Quote
I just bought a new GMC 320 v5. It is always giving high readings above 0.20 usv. Is it possible that my geiger counter is contaminated? Maybe during factory calibration with radioactive source?
Reply #1

EmfDev

2250 Posts
Posted - 08/27/2019 :  09:31:48  Show Profile  Reply with Quote
Hi Boyalon, what is the CPM in your unit? Have you tested it somewhere else? It's impossible that it got contaminated during factory calibration.
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Reply #2

Boyalon

Ukraine
2 Posts
Posted - 08/27/2019 :  10:55:59  Show Profile  Reply with Quote
About 50 cpm. Maybe because of radon?
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Reply #3

EmfDev

2250 Posts
Posted - 08/27/2019 :  11:24:57  Show Profile  Reply with Quote
We're not sure yet. Where is it 50 CPM? Have you tested it outside or other places?
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