RE: Ion Chamber Instruments -Reply

[Michael Williamson <m.williamson@mailbox.uq.edu.au>]

It's strange how different one's experiences with equipment can be.  I had
nothing but woe from a pair of Keithley 36150's and years of trouble free
use from a Victoreen 450B. Mind you, I keep the Vict in a desicator when
not in use...  tried it with the Keithleys but they still went bad after an
hour or so in 70% humidity conditions (as I write it's about 80%!).

I have however had some bad experiences with older Victoreens like the
470A, the 471RF and even the 450P (it doesn't seem to like elevated
temperatures (35C+)).

In a humid climate, it's best not to have to depend on an ion chamber
instrument.  I prefer to use them as air-conditioned lab instruments rather
than field survey meters.

Mike


Michael Williamson				ph +61 7 3365 4504
University Radiation Protection Adviser		fax +61 7 3365 1577
The University of Queensland			m.williamson@mailbox.uq.edu.au
Brisbane 4072
Australia

Any advice or information given in this posting is the opinion of the
writer alone and other than where explicitly stated, does not represent the
views or policies of the University.


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