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 2.GQ Geiger Muller Counter
 2.57 Software is showing odd difference to device

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T O P I C    R E V I E W
Luke_Thighwalker Posted - 05/16/2019 : 14:16:07
Hey all,

I am using my brand new GMC 600 and the GMC Data viewer, and I am seeing an odd discrepancy between my device and what is being displayed on my desktop client. For example:

device: 26 CPM
client: 29 CPM

Device: 0.067
client: 0.167

zoom set at x.05

Also, if anyone would be willing to explain to me what the "zoom" is, It'd be appreciated!
4   L A T E S T    R E P L I E S    (Newest First)
EmfDev Posted - 05/24/2019 : 08:55:50
Hi paul, you need to make sure the calibration in the viewer is the same as in the device. You need to read calibration from your 600+.

Edit: Viewer calibration is under Settings->Terminal
paul Posted - 05/24/2019 : 08:53:01
My 600+ and the viewer read more or less the same CPM
but the uSv/h are very different,sometimes nearly double.
600 = 0.229 viewer = 0.384
600 = 0.163 viewer = 0.241
600 = 0.154 viewer = 0.357
600 = 0.180 viewer = 0.410
600 = 0.143 viewer = 0.331
definitely not linear.

viewer is 2.57
600+ is 2.07

whats up ?
SolarSurveyMonitor Posted - 05/17/2019 : 20:57:15
Just a side note: Using realtime monitoring doesn't read counter's data as it's shown on screen, rather it would start counting on its own, by being measuring counts per second (CPS). The device sends to PC the detected CPS in each second.

Zoom is for counting graph magnification, for normal backround radiation X2-X10 should be fine, however if you measure high counts per second, like for instance 10,000 CPM or more you problably like to shrink graph to fit on screen.
EmfDev Posted - 05/16/2019 : 14:57:33
Hi Luke, maybe need to wait 1 minute till the device is completely synced with the data viewer.

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