Tektronix LumaColor II J18, Instruction Manual

Page: 38 / 114

Tutorial
2–8 J18 Photometer Instruction Manual
5. Press the HOLD/RUN button again to return to the direct
measurement mode.
Comparing Measurements
NOTE
. The DIFF/REF button will only work with the J1810
sensor-head.
Press the DIFF/REF button to enter the differential mode.
Repeatedly press the DIFF/REF button to step to a reference
memory location.
The differential mode displays the differences between the current
and stored values. The color bars on the left side of the display show
the relative color differences of the red, green, and blue components.
The numeric display indicates the magnitude differences in the
color-coordinate system. See Figure 2–3.
+
–
Figure 2–3: Typical Differential Measurement Display
NOTE
. The bargraphs are nonlinear to provide improved resolution
when approaching the reference values.
Tutorial
2–8 J18 Photometer Instruction Manual
5. Press the HOLD/RUN button again to return to the direct
measurement mode.
Comparing Measurements
NOTE
. The DIFF/REF button will only work with the J1810
sensor-head.
Press the DIFF/REF button to enter the differential mode.
Repeatedly press the DIFF/REF button to step to a reference
memory location.
The differential mode displays the differences between the current
and stored values. The color bars on the left side of the display show
the relative color differences of the red, green, and blue components.
The numeric display indicates the magnitude differences in the
color-coordinate system. See Figure 2–3.
+
–
Figure 2–3: Typical Differential Measurement Display
NOTE
. The bargraphs are nonlinear to provide improved resolution
when approaching the reference values.