AW: [ RadSafe ] DHS Tests of Radiation Detectors WereInconclusive, Report Says

Doug Aitken jdaitken at
Thu Mar 6 17:50:36 CST 2008

Sandy et al:
I agree with your definition of calibration (as required, for instance, but
regulation in many instances). But in addition, I guess there is what is
(loosely) called a secondary calibration (or better referred to as a field
check or function check), where the user checks his instrument against a
known reference (normally supplied by the instrument manufacturer to the
user) to verify that it is functioning correctly.

IMHO, anything beyond the normal calibration and a field check with the
user's own references (and NOTHING supplied by the persons evaluating the
instrument performance) would be "fudging"......


-----Original Message-----
From: Sandy Perle
Your first example is how I define calibration (and NIST does as well).

-----Original Message-----
From: Franz Schönhofer <franz.schoenhofer at>
........ To make it short: "Kalibrierung" is something which
can be done in the respective laboratory, using sources provided by
institutions or companies tracing their results to some internationally
accepted standards. 
Doug Aitken     Cell phone: 713-562-8585
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