FISCHER FISCHERSCOPE X-RAY 5000 Series, Operator'S Manual

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Measurement device monitoring for the Fischerscope X-RAY When and how to carry out corrections?
104 FISCHERSCOPE
®
X-RAY
and of the substrate material) of the measurement application,

testing of the spectra library (see below).
With a Fischerscope XRAY with WinFTM software, the spectra of
the ”pure elements” are not measured anew during the
normalization but instead are accepted from the spectra library that
contains their spectra when the switch ”Measure elements” of the
DefMA is disabled. In this manner, the measurement application is
not changed during normalization, and therefore not corrected,
except for a potential substrate material correction. For such
measurement applications, normalization cannot provide any new
information.
Spectra that have been measured some time ago are no longer up-
to-date if the instrument has changed in the meantime. A test needs
to be performed to test if the spectra library is current. In this test,
the spectrum of Ag is measured anew and it is determined if it still
corresponds sufficiently to the Ag spectrum in the spectra library. If
this is not the case, an initialization (new measurement) of the
spectra library is recommended (”Init SPK library”). After renewed
measurement of the spectra library, the user must re-normalize all
measurement applications that have obtained their spectra from the
library in order to load the ”new” spectra into the measurement
application. The user is automatically made aware of this necessity
with each measurement application that he selects after the
initialization. Thus, the renewed measurement of the spectra library
complements the normalization as a corrective measure for those
measurement applications that do not require the measurement of
the pure element spectra. However, such a measurement
application otherwise never requires the measurement of the
involved pure elements. At most a base material correction is
required for the correction.
The measurement application should be checked once more after
every corrective measure. If the limits are still violated, we
recommend a re-calibration of the measurement application. Due to
its high stability, corrections of the measurement applications of a
Fischerscope XRAY are typically required only after several weeks
or months.
NOTE: Note: All measurements for monitoring of the mea-
surement devices as well as all potential corrections
should only be performed once the instrument has
been measuring for a sufficient length of time, that is,
it has generated ”radiation”. 15 – 30 min of operating
time are sufficient for this purpose. Thus, measure-