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mimichris
France
21 Posts |
 Posted - 02/28/2025 : 06:00:33
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Hi,
When I start my GMC-500, it displays anything, jumps from 5CPM to 4800CPM and to 2850CPM.....and this without stopping, it seems to be broken, it has been a long time since I used it. |
Maxime |
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| Reply #1
EmfDev
2318 Posts |
Posted - 02/28/2025 : 14:22:16
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| try to do a factory reset. If still does not work, tube may need to be replaced with m4011 / j321 |
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| Reply #2
mimichris
France
21 Posts |
Posted - 03/01/2025 : 01:40:37
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quote:
Originally posted by EmfDev
try to do a factory reset. If still does not work, tube may need to be replaced with m4011 / j321
Hi, Factory reset done, didn't change anything, still the same problem. |
Maxime |
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| Reply #3
EmfDev
2318 Posts |
Posted - 03/03/2025 : 11:15:56
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| need to change the tube. |
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| Reply #4
mimichris
France
21 Posts |
Posted - 04/15/2025 : 04:13:02
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Hi,
I changed the tube but I couldn't find a black tube, it seems to work well, I tried the old tube on another Geiger counter and it works, I didn't make any comparative measurements but the gas is inside otherwise it wouldn't work. Strange......... |
Maxime |
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| Reply #5
EmfDev
2318 Posts |
Posted - 04/15/2025 : 13:02:28
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| you can use a black shrink wrap instead. or check for light sensitivity if you need to do it. |
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Topic |
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GMC-500
