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 Real Event or GMC500 Fault		  New Topic  Reply to Topic
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Phildel

Australia
8 Posts
Posted - 03/28/2023 :  02:27:37  Show Profile  Reply with Quote
I have GMC500 NW of Melbourne Australia. Its been online for about 5 years.
On 26March2023 I had a 10+Million CPM count.
Coincidentally my region has been getting extreme Auroras.

?,, could this be a real reading or is it more likely a machine fault.

The unit has been stable at an average count 60+-2CPM for the past several years so the big hit is interesting.
Phil
Reply #1

ullix

Germany
1171 Posts
Posted - 03/28/2023 :  02:50:48  Show Profile  Reply with Quote
If I am not mistaken then the coulmn headings are:

	CPM 	ACPM 	uSv/h

The uSv/h data are the same a CPM data, except for a factor of 153 (= tube sensitivity), e.g.: 56 / 154 = 0.36

It does seem mathematically impossible that ACPM - the avarage of CPM - is orders of magnitude higher than the CPM average. And it is equally impossible that the average rises from 58.62 to 10 million in a single record within 6 sec.

Thus a counter defect. Also possible: a server defect
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Reply #2

Phildel

Australia
8 Posts
Posted - 03/28/2023 :  22:50:21  Show Profile  Reply with Quote
Thank you for the clarification.
Phil
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