Re: GM counter and Two-Way Radios

[Chris Davey <cdavey@med.phys.ualberta.ca>]

On Mon, 23 Oct 1995, Alex Zapantis wrote:

> 
> >>We did the same thing using a Victoreen 450P (pressurized ionization 
> >>chamber), whilst making measurements of radiation from a linear 
> >>accelerator.  The meter actually registered way down (negative, with 
> >>readings in milliR, as it is a LCD equipped meter). 
Of course, I should have been more precise and said mR/hr
> 
> Is it possible that your ionisation chamber has become "wet" somehow? That
> might explain negative readings. Victoreen makes an RF shielded ionisation
> chamber detector. Is the 450P that one? I can't remember.
> 
No, this meter is not shielded!  And no, its pretty dry here....
Actually, I remember getting really impressive readings with a Keithley 
36150 meter (also ionization chamber) but this was a couple of years ago, 
and I just thought it was amusing at the time
> > 
> 
>                         Alex Zapantis
>                         Radiation Safety Officer
> 
I liked the humorous responses... who says scientists aren't funny?

Chris Davey, RSO