X-Rite 500 Series, Operator'S Manual

Page: 88 / 124

C H A P T E R F I V E
5 - 34
Measuring Paper
The instrument takes the density value of the paper and
automatically subtracts it from subsequent trap measurements.
Paper is always subtracted from the trap function.
To measure paper:
1.
If not selected, press the Tab Up key
$
or Tab Down
key
@
to highlight
Paper
. <
Measure Paper
>
appears in the user dialog. The paper values
displayed are the current values set in the instrument.
2.
Center the instrument target window over a sample of
the paper, and lower the instrument to take a reading.
3.
The paper values are updated and the display
highlight advances to
OverP
.
Measuring Trap Procedure
So far, you have performed the procedures to select the
trap formula and measure Dmax and paper.
You are now ready to begin taking measurements to check
trap values. Trap is calculated after measurements of the
paper, overprint, second ink printed, and first ink printed.
NOTE: If the highlight in the measurement list changes to an
incorrect item after a measurement, use the
$@
keys to move the
highlight to the correct item before releasing the instrument.
To measure trap:
1.
After measuring paper (and Dmax for newsprint),
make sure
OverP
is highlighted on the screen and
center the target window on an overprint patch.
2.
Lower unit to target window and hold closed. Once
measurement data is displayed, release the unit.
3.
Make sure
Ink2
is highlighted on the screen and
center the target window on second ink down patch.
T R A P
-
R E F O p t i o n s
P a p e r
O v e r P
I n k 2
I n k 1
^
V 0.13
C 0.12
M 0.13
Y 0.22
<
M e a s u r e P a p e r
>
T