FISCHER FISCHERSCOPE X-RAY XDLM 231, Operator'S Manual

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146 FISCHERSCOPE ® X-RAY
Calibration, Base Correction and Reference Measurement
Procedure
1. To start the base correction, select Calibrate > Base correction .
The window Element: Measure product‘s base material appears.
2. Position the base material, then click OK .
18.2 Calibration
18.2.1 Purpose of the Calibration
A calibration is required in the following situations:

A new measuring application has been set up.

A product was imported.

If during a reference measurement 1 a deviation was encountered that is greater than two to
three times the standard deviation s, perform a Reference Measurement first (see Chap. 18.3
on Page 152). If the deviation continues to exist even after the Reference Measurement, perform
a calibration.
The calibration sets the difference between nominal value and actual value to zero.

Actual value refers to the reading displayed by the instrument.

The nominal value is the value engraved on the calibration standard (engraved value).
Calibrating enables secured measurements : If the nominal values of the used standards can be
traced to recognized material measures or reference materials, then the measurement is secured
through the calibration.
Depending on the measuring application, it may be difficult to evaluate the result of a calibration
in individual cases. If you have any questions, please contact FISCHER via the website www.hel-
mut-fischer.com.
FISCHER can carry out a calibration service for you. In this case, you will receive a corresponding
sheet with calculations and implications for evaluating the calibration.
18.2.2 Performing the Calibration
The following is required for a calibration:
1. A reference measurement is a measurement on a reference sample with known properties.
Calibration standards Coating thickness and material composition of a calibration stand-
ard are known and have been determined using a very accurate
measuring method.
Base material (substrate
material) Specimen with the coating(s) to be measured.
Required only if the base material is not a pure element.