PR-680/680L User Manual
7
H
OW TO
M
AKE
L*
U
*
V
*
OR
L*
A
*
B
*
M
EASUREMENTS
1.
Touch the
▼
or
▲
icons in the
Measurement Mode
field to select
L*u*v*
or
L*a*b*
.
2.
To make
L*u*v*
or
L*a*b*
measurements, it is necessary to first select a white reference
(
Illuminant
). Touch
Select a
t th
e bott
om of the Illuminant column. A screen similar to the
following ap
pears:
FIGURE 50 - L*U*V* SETUP SCREEN
FIGURE 51 - FILE RECALL SCREEN
3.
To access factory stored illuminants, touch the
▼
or
▲
icons in the
Current View
field until
Standard Illuminants appears.
An
Illuminant
may also be a previously measured AND STORED
file
–
for example a florescent lamp. If it is desirable to use a previous measurement then select
Internal RAM
or
External SD Card
(if an SD card is inserted).
OR
Press the
MEASURE
button then touch
Back
then
Recall
to accept the measured data.
FIGURE 52 - STANDARD ILLUMINANTS SCREEN
4.
If using a pre-stored illuminant, at the top of the screen that pops up, the title of the
lluminant
appears.
Touch
Next
(or
Previous
) to scroll through available choices.
5.
Touch
Back.
6.
Touch
Recall
to select the illuminant of choice. The
Standard Illuminant
screen updates to show
the data of the illuminant selected.