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 2.GQ Geiger Muller Counter
 500+ Tube 2 still counts in Tube 1 mode?

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T O P I C    R E V I E W
UnstableIsotope Posted - 12/05/2023 : 20:13:31
I turned on the individual CPM1 / CPM2 counts in the menu.

In dual tube mode, when close to my Uranium ore I got about 1400 counts on CPM1 and 20 on CPM2. The two were summed for the final CPM value.

I then selected Tube 1 only mode and power-cycled the unit as required.

It still showed similar counts for CPM1 and CPM2 but only used CPM1 as the final CPM value.

I assumed it would disable or power down Tube 2 in this mode and logically remove CPM2 from the display.

Am I expecting this incorrectly?
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UnstableIsotope Posted - 12/06/2023 : 09:29:04
I tested Tube 2 only mode and that acts like I would expect. Not only does CPM1 show no counts, but when I check the tube voltage for tube 1 it shows 12V (41.33%) indicating that indeed, Tube 1 is powered down. However, the Tube 2 voltage option only shows percentage not voltage like tube 1. Another bug?

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