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 2.GQ Geiger Muller Counter
 GMC-300E : Can I get cumulative dose ?		  New Topic  Reply to Topic
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myf

France
6 Posts
Posted - 10/06/2013 :  08:23:02  Show Profile  Reply with Quote
Hello,

I have a GMC-300E and I try to get the cumulative dose in Sv from total count, not the average dose per hour from CPM.

It seems that :

0.5 * 10**-6 * CMP = Sv/h

So I expect that : is it right ?

0.5 * 10**-6 / 60 * TotalCount = Sv

An other question : how does the inner CPM counter compute ?

Is there a small array with 60 index for each second per minute, and CPM value is : NowTotalCount - PreviousTotalCount60SecondsAgo.

Many thanks !

F. happy with this little Geiger-Muller counter.
Reply #1

myf

France
6 Posts
Posted - 10/06/2013 :  11:57:58  Show Profile  Reply with Quote
And I forget to divide by 100 :

The coefficient must go from 20CPM to 0.10microSv/h
not to a hight 10microSv/h.

So I replace 10**-6 by 10**-8 in the previous formula...
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