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 2.GQ Geiger Muller Counter
 GMC-500+ Normal Medium High Thresholds
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Stargazer 40

USA
255 Posts

Posted - 10/24/2018 :  04:08:15  Show Profile  Reply with Quote
I'm testing the SI3BG GM tube with higher activity source. CPM are easily over 100CPM. Tube1 is off and tube2 only being used. I noticed for the first time that the Normal, Medium and High display warnings and LED color are coupled to CPM counts of <50, 50-<100, and >100CPM. Alarm works just fine at its settings, which are menu selectable between CPM, uSv/h and mR/h. So with high activity source the SI3BG tube2 shows Normal on the display until 40 uSv/h (50CPM*.797CPM/uSv/h) when it goes to Medium and High comes on at 80 uSv/h (100CPM*.797CPM/uSv/h).

We need to be able to set the Medium and High warning thresholds on the display (and LED response) for uSv/h and mR/h based on fact that different tube sensitivities are not now being considered. Given DIY addition of different tubes to meters this need to be available to the 500 and 600 series meters (haven't tested 300 series response).

Hopefully this is something that could be added while you're working on dead time count integration and Fast Estimate Time add to the firmware.

Stargazer 40

Edited by - Stargazer 40 on 10/24/2018 04:14:38
Reply #1

EmfDev

311 Posts

Posted - 10/24/2018 :  13:49:13  Show Profile  Reply with Quote
It's possible. We will see what we can do. We've been considering this change before. Thanks!

Edited by - EmfDev on 10/24/2018 13:50:07
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Reply #2

Stargazer 40

USA
255 Posts

Posted - 10/24/2018 :  15:38:18  Show Profile  Reply with Quote
Thanks!

Stargazer 40
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