Calibration With Rea Calibration Card - REA VeriCube Operating Manual

Grid non uniformity (GN)
Axial non uniformity (AN)
Contrast uniformity
(see Modulation, text below)
Fixed Pattern Damage (FPD)
*In the standard ISO/IEC 15426-2, GN and AN are described as absolute values with
tolerances +/-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
Symbol contrast
Modulation
Module size
Print growth
9.2.3

Calibration with REA calibration card

Calibration is performed by selecting the menu >configure, >Calibrate device..:
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REA VeriCube Operating Manual Version 2.16 – 11/2020
%* +/- 6
%* +/- 2
% +/- 10
Grade +/- 0
Unit Tolerance
% +/- 8
(calculated from
Rmax and
Rmin)
Grade +/- 0
µm +/- 5
µm +/- 10
reference test
report
Reference
Measurement
values on the
stamped
reference test
report
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