© REA Elektronik GmbH, Teichwiesenstraße 1 D-64367 Muehltal
REA VeriCube Operating Manual Version 2.16 – 11/2020
Page 53 of 119
The following data must be examined in order to make sure that the correct symbol
with the settings for the test equipment monitoring has been used.
Further
measurement data and threshold values, which are shown, in addition, in
the test report in the context, shall be ignored for this testing.
Aperture
1
16 mil, 0.406 mm
Light type
660 nm - 45° from all four sides
Symbol
Passed 4.0
Symbology
Data Matrix ECC200
Code content
30Q324343430794<OQQ
The following table lists the criteria, which must be examined according to ISO/IEC
15426-2.
Allowed tolerances for calibration with red light:
Measurement parameter
Unit
Tolerance
Reference
Rmax
2
(see the histogram)
%
+/- 5
Measurement
values on the
stamped
reference test
report
Rmin
3
(see the histogram)
%
+/- 3
UEC
4
%
+/- 0
Grid non uniformity (GN)
%*
+/- 6
Axial non uniformity (AN)
%*
+/- 2
Contrast uniformity
(see Modulation, text below)
%
+/- 8
Fixed Pattern Damage (FPD) Grade
+/- 0
*In the standard ISO/IEC 15426-2, GN and AN are described as absolute values with
tole/-0,06 and +/-0,02. For better understanding, we report these
parameters in %. So we do have a tolerance of +/-6 and +/-2.
In the standard ISO/IEC 15426-2, Modulation is specified instead of contrast
uniformity. This is also correct in the sense of the control, but difficult to follow. A
footnote in ISO/IEC 15426-2 states that it is a per cent value. This per cent value
refers to the Contrast Uniformity value specified for the test symbol 5 (see the card
with the REA article number 90031704). Contrast uniformity is one detail value of
many used to determine Modulation for the entire symbol.
1
Aperture – Synthetic aperture according to the definition of ISO/IEC 15415
2
Rmax – Maximum Reflectance according to ISO/IEC 15415
3
Rmin – Minimum Reflectance according to ISO/IEC 15415
4
UEC – Unused Error Correction – defined in ISO/IEC 15415
