Vernier LabQuest 2, Руководство пользователя

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LabQuest
®
App
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Tap OK to keep this function and display the modeled function on the Graph screen. To exit
the Model tool without applying the function, tap Cancel.
TIP! If no function appears when modeling, your parameters are likely defining a curve that
is outside of the plot window.

Advanced
– Choose Advanced from the Analyze
menu to access advanced analysis tools including a
Baseline Adjustment, Fast Fourier Transform
(FFT), and Peak Integration.
o
Baseline Adjustment
– This tool applies a factor
that raises or lowers the x-axis. Because
LabQuest App uses the x-axis as its baseline
when calculating an integral, adjusting the
baseline may result in a better integral. This
tool is typically used when analyzing
Spirometer data.
o
FFT
– The FFT tool calculates a Fast Fourier
Transform of the selected data. The FFT is
displayed in a separate graph that can be
analyzed. Tap OK to return to the main graph.
The peak frequency will be displayed on the
graph legend. The FFT tool is typically used
when analyzing Microphone data. For more
information, see www.vernier.com/til/2310
o
Peak Integration
– This tool calculates the integral for a selected portion of a graph. It is
most commonly used with the Vernier Mini GC, but it can be applied to any data plot.
Peak Integration differs from the Integral tool in that it does not use the x-axis as the
baseline. Instead, the integral for Peak Integration is evaluated from the minimum y-
values to the left and right of a selected peak.
o
Pivot Data
– This tool is only available in Data Matrix mode. It transposes the rows
(usually graphed as the x-axis and representing the sampling site) with the runs (usually
selected by tapping on the button to the left of the Filing Cabinet and representing the
sampling day). This field data can be viewed as the location changes, or pivoted and
viewed as the day changes.