X-Rite 504 SpectroDensitometer Betreibershandbuch Seite 105

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Seitenansicht 104
INSTRUMENT FUNCTIONS
5-51
Compare Function (520, 528, 530 only)
The Compare function is used to compare sample
measurements to previously stored references. A total of
24 references can be stored in the instrument's Compare
function. After a sample is measured, the instrument
automatically locates the closest reference match (lowest
ΔE) and displays the difference.
NOTE: When no references are stored only Compare mode appears
in the display.
Compare –Ref Mode
A sample is compared to a reference using colorimetric
(L*a*b*) or densitometric (VCMY) calculations. Density
or color cannot be selected manually, but is based on the
setting of the Reference Option.
Colorimetric Densitometric
Setting Options
Pressing the Enter key # with the Options menu
highlighted opens the Compare Options menu. The ΔE
method and Observer Angle is selected under this menu
item. References are also cleared from this menu.
ΔE Method
The instrument supports three tolerancing methods: CMC,
Lab, and CIE94. The 520 only has Lab available.
Refer to Color Function earlier in this section for
additional information on available
Δ
E Methods.
COMP—REF 01 Options
Color
Referen
ΔE 0.125
<Measure Sample>
D50/2
Compare Options:
ΔE Method : CMC
Observ Angle: 2
Clear References
<Edit Option>
CMC, Lab, CIE94
COMP—REF 02 Options
Density
Referen
ΔV 0.01
ΔC 0.01
ΔM 0.02
ΔY 0.01
<Measure Sample>
T
Clears all compare
references
2, 10
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