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 GMC 320+ v4.2 CPM Spikes
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housinit

USA
2 Posts

Posted - 03/06/2017 :  14:52:06  Show Profile  Reply with Quote
I recently purchased the 320+ v4.20 and a few times a day I get spikes on my logger software on my laptop. I have it hooked up via USB and generally get normal background radiation counts, but every once in a while I get counts up to 250 for a short period of time (1 to 2 minutes). I have never actually heard it happen or been able to see it happen, I only see it on my logger pro software. Any ideas? Could this be some kind of grounding issue? Another thing is that the device itself doesn't show that the max is 250, it usually shows about 30 to 35 as the maximum CPM.

Thanks!

-Housinit
GMCMAP user/contributor
GMC-320+
Reply #1

Distelzombie

Germany
188 Posts

Posted - 03/07/2017 :  01:25:42  Show Profile  Reply with Quote
My guess is the software then. It has many problems related to the serial connection. You could try one of the python programs. If they show the same error its probably the USB port of something related to that. You could try it on another pc too.

GMC-300E+ V4.20 with sbt-11a alpha tube

My statements are "stuff-a-hobbyist-says" and not in any way professional.
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