PR-680/680L User Manual
19
S
ETTING THE
N
UMBER OF
M
EASUREMENTS TO
A
VERAGE
To help improve measurement results, especially measurements where low light levels are being tested,
the PR-680/680L can be instructed to make consecutive measurements (1
–
99) and average the results.
Following a multiple measurement sequence, the spectra are averaged, and resultant photometric and
colorimetric values calculated from the averaged spectra.
1.
To set the number of measurements to average, touch the field next to
Average
. The following
serene appears:
FIGURE 64
–
MEASUREMENT AVERAGE ENTRY SCREEN
2.
Enter the number of measurements to average. The range is 1 to 99.
3.
Touch
Back
when done.
S
ETTING
S
MART
D
ARK
M
ODE
During a measurement the PR-680/680L make two separate measurements
–
one of the optical signal
(
Light
), and a second measurement of the detector dark current (
Dark
). By enabling the
Smart Dark
feature, the PR-680/680L will attempt to use the same dark current values for more than one
measurement thus reducing total measurement time by approximately half. The
Smart Dark
feature is
used when the instrument determines that the (second or successive) measurement in a series is using
the same exposure time as the first measurement. If a fixed exposure time is used for a measurement,
Smart Dark
will be used until the exposure time is changed.
Smart Dark
is a useful tool for applications such as display uniformity, or other testing where multiple
measurements of the same light level are performed.
To enable
Smart Dark:
1.
Touch the field next to
Smart dark
to toggle between
Enabled
and
Disabled.