All Forums  GQ Electronics Forums  2.GQ Geiger Muller Counter  Checking GMC-320S accuracy after long storage

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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by smanna[/i] [br]Hi everyone, I recently pulled my GMC-320S out of storage after not using it for almost two years, and I’m noticing that the CPM readings seem slightly higher than what I used to get in the same environment. Before I assume the tube is drifting, is there a reliable method to verify whether the CPM readings are still accurate? For example: Is there a recommended low-cost check source or calibration reference for home users? Does long-term storage affect the M4011 tube’s baseline readings? Should I perform any internal reset or firmware check before testing accuracy? Thanks in advance for any guidance! [/quote]    Insert an Image File Check here to include your profile signature.