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 2.GQ Geiger Muller Counter
 France - French - Hight CPM		  New Topic  Reply to Topic
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JL

France
1 Posts
Posted - 09/27/2019 :  08:16:56  Show Profile  Reply with Quote
Hi,
this morning I had a 100 cpm alert on my 320+ in my home.
I moved my detector inside my home.
And when I tilted the backward bottom of my detector towards the sun, I had CPM peaks at over 30,000.
is that normal?
currently outside and not directed towards the sun, the counter displays 650 CPM.
What do you think of that?

this is my ID :
h**p://www.gmcmap.com/historyData.asp?Param_ID=28255107050
HI
Edited by - JL on 09/27/2019 09:06:44
Reply #1

EmfDev

2250 Posts
Posted - 09/27/2019 :  09:50:04  Show Profile  Reply with Quote
Hi JL, the 320+ has a problem with light. Some of the 300/320 has this problem. So please dont put the tube directly under sunlight. Tube is located at the bottom.
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Reply #2

the_mike

Switzerland
53 Posts
Posted - 10/01/2019 :  10:02:58  Show Profile  Reply with Quote
HI Emfdev

...as Ullix has found out, the problem can appear out of the nowhere...

Do you have an idea what triggers the "sun-sensitivity" and what can be done against it? (except getting an SBM20..?)
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Reply #3

EmfDev

2250 Posts
Posted - 10/01/2019 :  11:50:39  Show Profile  Reply with Quote
You can put it in a black colored box/bag. Or cover it with a black tape? Also you can order a m4011 black tube from support.
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