© REA Elektronik GmbH, Teichwiesenstraße 1 D-64367 Muehltal
REA VeriCube Operating Manual Version 2.16 – 11/2020
Page 55 of 119
Grid non uniformity (GN)
%*
+/- 6
reference test
report
Axial non uniformity (AN)
%*
+/- 2
Contrast uniformity
(see Modulation, text below)
%
+/- 10
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.
Further testing criteria
Measurement
parameter
Unit
Tolerance
Reference
Symbol contrast
%
+/- 8
(calculated from
Rmax and
Rmin)
Measurement
values on the
stamped
reference test
report
Modulation
Grade
+/- 0
Module size
µm
+/- 5
Print growth
µm
+/- 10
9.2.3
Calibration with REA calibration card
Calibration is performed by selecting the menu >configure, >Calibrate device..:
