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javholgu
Mexico
1 Posts |
 Posted - 06/08/2015 : 20:58:24
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Hello,
The GMC 320 Plus can detect Beta, Gamma and X ray radiation. I wonder if somebody could explain how to meassure them individually and how to set up the meter to do this and display that it is in a Beta, Gamma, or X meassuring mode an show the meassurement. I am trying to detect radiation in a granite countertop. Also, I would appreciate if you could explain the meassurement methodology for different cases.
Thank you,
Javier |
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| Reply #1
ZLM
1261 Posts |
Posted - 06/13/2015 : 08:06:43
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Detects granite counter top is not problem on this Geiger counter. However, there is no way to distinguish between different radiations due to the nature of the Geiger Tube.
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| Reply #2
hkmk23
France
1 Posts |
Posted - 07/21/2015 : 04:57:30
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Hi,
newbie here.
So can someone tell me what settings I should have to get the readings from a granite counter top? and what readings are fine and what reading means I should get rid of the top and what readings mean I should run a mile...!
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| Reply #3
ZLM
1261 Posts |
Posted - 07/21/2015 : 10:16:42
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For the background readings we suggest:
1. Safe level. Less than 50CPM or 0.25uSv/h. Means no worry at all.
2. Attention level. 51CPM – 99CPM. OR 0.26uSv/h – 0.39uSv/h . Means you need to find out why .
3. Warning level. More than 100CPM or more than 0.40uSv/h. Means do not stay in this area for long period.
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| Reply #4
usagi
USA
4 Posts |
Posted - 07/22/2015 : 00:00:10
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| BTW you can get similar CPM from granite benches in public places. parks, etc. |
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| Reply #5
Nisei
Netherlands
20 Posts |
Posted - 10/29/2015 : 02:47:44
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quote:
Originally posted by ZLM
However, there is no way to distinguish between different radiations due to the nature of the Geiger Tube.
I don't agree. You can use a shield for beta radiation so it only measures gamma. You can't do it the other way around though (only measure beta).
I'm surprised the GMC counters don't come with a shield for beta radiation. Just like the probes which have a window to expose the tube. |
John |
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GMC 320 Plus
