LabQuest
®
2 – User Manual
15
Triggering
– Triggering is only available in the
Time Based mode. When enabled, LabQuest
waits for a trigger condition to be met before
recording data collection. To set the trigger
condition, choose the sensor and set the
threshold condition. You can also set the
number of points to be saved before the trigger
condition is met.
Advanced
– The Advanced field has three options that can be independently enabled by
selecting the associated check box.
Oversampling
can be used with data-
collection rates less than ten samples per
second. When enabled, the sensor will
sample at a higher rate than the number of
samples per second that you set, and then
LabQuest averages those readings and
records the averages in the data table. This
setting can be used to reduce measurement
noise by combining a burst of readings into
one value. As an example, oversampling
can sometimes reduce the influence of
unseen but real variations, such as as those
from a flickering light source.
Repeat
can be used with data-collection rates less than 250 samples per second.
When enabled, a new data-collection run is started as soon as the current run has
ended. Data for each run is overwritten when a new run is started. This setting is
helpful when doing exploratory investigations.
Enable Data Marking
can be used to mark
points of interest during a time-based data
collection. When enabled, a Mark Data
button
will appear during data
collection. Tap
to mark that particular
point as a point of interest. After completing
data collection, data marks can be named
using the panel to the right of the graph.
Photogate Mode
is used for photogate experiments that also use a time-based sensor
such as a force sensor. Examples include impulse and momentum and centripetal
force experiments. See
Photogate Timing
.