X-Rite 500 Series, Руководство оператора

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I N S T R U M E N T F U N C T I O N S
5-25
NOTE: As halftones become lighter and lighter (< 25%), the resulting
"color" tends towards the shade of the substrate itself. This may be
different from the shade of the ink or plate emulsion. If the Auto
Color mode is enabled there is a chance that the instrument will
select an undesired filter. To avoid this, manually select the
appropriate color filter when measuring regions with small dot
percentages.
To set dot color option:
1.
With the Dot Options menu displayed, press the Tab Up
key
$
or Tab Down key
@
to highlight the
Color
option.
2.
Press the Enter key
#
to access editor.
3.
Use the Tab keys
$@
to move the highlight to desired
color setting.
4.
Press the Enter key
#
to select highlighted setting.
5.
Continue with additional option settings, or press
Escape key
!
to exit options.
nFactor
Your instrument is preset at the factory to use the Murray-
Davies formula (Off) to calculate dot. The Yule-Nielson
formula (On) allows you to compensate for the amount of
reflected light (absorbed or trapped) lost when taking a dot
measurement.
The numeric option allows you to adjust the value to meet
your requirements. The numeric value can range from 0.500
to 9.900. The value set only applies when the nFactor is set to
Yule-Nielson (On).
Approximate "n" values for various materials:
Uncoated paper 2.700
Coated paper 1.600 - 1.700
Newsprint 2.500
To set "n" factor:
1.
With the Dot Options menu displayed, press the Tab Up
key
$
or Tab Down key
@
to highlight "
nFactor
" option.
Press the Enter key
#
to access
nFactor
menu.
2.
To adjust value, use the Tab keys
$@
to choose the
desired digit (arrows above and below designated
selection). Press the Enter key
#
to access the editor.