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 1.Geiger Counter World Map(www.GMCmap.com)
 gmc-500+ not reading anymore
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skiredall

Georgia
2 Posts

Posted - 05/21/2022 :  22:24:11  Show Profile  Reply with Quote
Hi everyone,
Couple of weeks ago, I purchased gmc-500+ and configured to upload data as well. It was normally functioning and reading around 15-30 CPM normally.
Yesterday it stopped to read any data and showing O CPM only.
I have tried factory reset as well as removing the battery but nothing helped.
Can anyone help me?
Reply #1

skiredall

Georgia
2 Posts

Posted - 05/23/2022 :  00:09:25  Show Profile  Reply with Quote
I have found the problem was in broken tube 4011.
Can I substitute it with other compatible tubes?
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Reply #2

EmfDev

2132 Posts

Posted - 05/31/2022 :  10:48:02  Show Profile  Reply with Quote
Hi skiredall, you can just compatible tubes as long as they can fit in the tube holder, you may need to solder/recalibrate if tubes are different. But you can just buy same M4011 tube to replace the old one.
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