Vernier LabQuest 2 - Manual (Page 18)

LabQuest App
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number of samples could lead to performance issues. You can still collect data
using these settings; however, you may have undesirable results.
The red warning indicates one of the following, and you cannot exit the dialog
box until the warning condition has been resolved:
 The rate has been set to a value slower or faster than what a connected
device and/or sensor configuration can support
 The number of samples exceeds the storage available
 The number of samples exceeds 2000 (for rates faster than 80,000
samples/s)
Triggering – Triggering is only available
in the Time Based mode. When enabled,
LabQuest waits for a trigger condition to
be met before beginning 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.