X-Rite 500 Series, Operator'S Manual

Page: 105 / 124

I N S T R U M E N T F U N C T I O N S
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
Δ
E) 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
Δ
E
method and Observer Angle is selected under this menu
item. References are also cleared from this menu.
Δ
E 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.
C O M P — R E F 0 1 O p t i o n s
C o l o r
R e f e r e n
Δ
E 0.125
<
M e a s u r e S a m p l e
>
D 5 0 / 2
C o m p a r e O p t i o n s :
Δ
E M e t h o d : C M C
O b s e r v A n g l e : 2
C l e a r R e f e r e n c e s
<
E d i t O p t i o n
>
CMC, Lab, CIE94
C O M P — R E F 0 2 O p t i o n s
D e n s i t y
R e f e r e n
Δ
V 0.01
Δ
C 0.01
Δ
M 0.02
Δ
Y 0.01
<
M e a s u r e S a m p l e
>
T
Clears all compare
references
2, 10