Techkon Spectro Jet Manual page 15

Spot measurements
How to measure
Please ensure that the device always has a firm stand on a solid and flat surface. The
rubber wheels prevent the device from slipping in the vertical direction. 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 back-
ground material underneath the measurement sample can have an influence on the
measurement 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 measure-
ment.
Manual TECHKON SpectroJet Chapter 3 – How to use SpectroJet
Here the optional available guiding track
SpectroJet Track is a helpful tool.
• 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 posi-
tion the device with the measurement head
on a single measurement patch and press the
green measurement button shortly.
During the measurement process all LEDs
flash up simultaneously. A double sound con-
firms, that the measurement is completed
and the measurement data are displayed by
the ExPresso software in the window "Spot
measurement".
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