RE: Lantern mantles

["Daren Perrero" <dmperrero@email.msn.com>]

Dave, the use of the check source certainly provides a reasonable assurance
that the meter is responding to radiation in a consistent manner, but can
you make any assumptions regarding the instrument's linearity or accuracy
over its range of operation from a single check point?  I thought that the
necessity of an periodic (full) calibration was done for this reason, among
others.

Daren Perrero
dmperrero@email.msn.com
I'm with the government, I'm here to help you....


> -----Original Message-----
> From: radsafe@romulus.ehs.uiuc.edu
> [mailto:radsafe@romulus.ehs.uiuc.edu]On Behalf Of David Krueger
> Sent: Monday, September 21, 1998 12:23 PM
> To: Multiple recipients of list
> Subject: Re: Lantern mantles
>
> My response is that a check source only need to be long lived so that its
> radioactivity is not going to change over the period that it will be used.
> If an instrument is properly calibrated with traceable sources and its
> response to any check source (traceable or not) is documented, then
> continuing to use that source to verify that the instrument
> responds in the
> same way (gives the same reading consistantly) would appear to be all that
> is necessary. Otherwise, Mike's suggestion basically ends up calibrating
> the instrument every time it is used.
>
> Dave Krueger, CHP
> dkrueger@icnpharm.com
>
>
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