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 2.GQ Geiger Muller Counter
 GMC-320 plus is no longer counting
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thinkengineesco

Guyana
1 Posts

Posted - 10/19/2017 :  11:51:02  Show Profile  Reply with Quote
For more than a year now my GMC-320 plus is no longer counting. It comes on and the software works, but counts zero. It worked well for over a year after I bought it.
Your advice will be highly appreciated.

Alfred Bhulai
Reply #1

flukeguy

USA
13 Posts

Posted - 10/22/2017 :  06:04:25  Show Profile  Reply with Quote
Hello Alfred,

Just throwing my thoughts out there. Perhaps the GM tube is broken, damaged? I have seen them on Ebay for ~$30 US. Might try contacting GQ Electronics directly support@gqelectronicsllc.com to see what they think.

--Terry
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Reply #2

ZLM

1194 Posts

Posted - 10/22/2017 :  07:38:46  Show Profile  Reply with Quote
Check the Tube voltage too. With 10M internal meter, it should read about 150V on 1000V range. With 2M internal meter, it should read about 35V on 1000V range.
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