Eberline E-520 same idea but it is actually disables external probe when x1000 selected, which probably could be useful when you are trying to measure 2 R/h :)
I cant speak for the modern 14c or its variants, but my older 14c disables the internal when its below the highest range and in reverse disables the external when on the high range. You wouldnt be able to trust the readings of either your external or internal probe if it was the case you mention.
@@jamesluck2969 yes, when 14C switched to x1000 range it disables counting but HV is still present at external connector, with E-520 there's no counting and no HV when internal tube range is selected: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-q6M9AxuteHA.html
I just watched an emergency services training video that said that anything above 300 c/min is contaminated. You might want to get out of that room. :-)
Well it hugely depends on what probe is being used, here is an ultra sensitive gamma scintillator, compared to what most what most emergency services use is a many many less sensitive Geiger muller device, :-)
