Techkon SpectroDrive Manual page 13

Spot measurements
How to measure
Please ensure that the sample is located on a solid and flat surface. There must not
be a distance between the measurement head and the sample where light could pass
through, because this can influence the measurement. The color of the background
material underneath the measurement sample can have an influence on the measure-
ment result. Different technical standards describe which backing material to use. In
the printing industry the following procedure is widely used: White backing for single
printed papers and black backing for double printed sheets in order to avoid that the
back printed side might shine through the paper and influence the measurement.
Manual TECHKON SpectroDrive Chapter 3 – How to use SpectroDrive
It is important that the measurement aper-
ture always covers the color patches com-
pletely during the entire scan.
• When using color bars with a patch height
smaller than 4,5 mm, the edge of the mea-
surement head of the device has to be placed
exactly at the upper edge of the color bar, to
ensure that the measurement head is posi-
tioned correctly on the patches.
• When using color bars with a patch height
higher than 4,5 mm, the measurement head
has to be placed with the measurement aper-
ture at the bottom edge of the color bar.
• To carry out a spot measurement just
remove the measurement device from the
horizontal track, position it with the mea-
surement head on a single measurement
patch and press the green measurement but-
ton shortly. An acoustic signal confirms, that
the measurement is completed and the mea-
surement data are displayed by the ExPresso
software in the window "Spot measurement".
Page 13