Hach-Lange SPECTRO COLOR d-8 - Manual (Page 18)

BDA 387/2
19
Measuring procedure
• Place spectro-color
®
in perpendicular
position to the reference sample.
• Press the measure button to trigger
measurement. Do not move spectro-color ®
as long as the display shows a clock.
• Measuring is signalled by a measuring start
and end beep.
• The display shows the colour values of the
reference in the selected colour system.
• Place spectro-color
® in perpendicular
position to the sample.
• Press the measure button to trigger
measurement. Do not move spectro-color ®
as long as the display shows a clock.
• Measuring is signalled with a beep.
• The display shows the colour difference
values of the sample in the selected colour
system.
• With the Grf key (graphics) the spectral
reflectance curves of reference and sample
are displayed and the lettering of key T1
changes to Lab (CIE-L*a*b*-diagram).
• Pressing the Prt key (print) opens the
print option menu (see below).
• Press the Lab key to display the CIE-
L*a*b*-diagram with the axis scale adapted
to the colour difference.
• Pressing the Prt key (print) opens the
print options menu.
Reference values _
M
L* = 83.03
a* = 0.09
b* = 7.82
×
ΔC D65/10/SPIN
ΔE* ΔL* Δa* Δb* Grf
DIM
ΔE* = 0.41
ΔL* = 0.39
Δa* = ‐0.04
Δb* = ‐0.12
Mi = 0.03
×
Lab
Prt
R%
80
60
40
20
0 _______________________
400 500 600 700
×
Grf
Prt
Δ L*
2 +Δb
1
.1
0
‐Δa
‐.1 .1
+Δa
‐1
‐.1
‐2 ‐Δb
Ч