3-5Lasair® Pro Aerosol Particle Counter Operations Manual
Chapter 3 : Your System
Use the HOME screen for viewing sampling data in a variety of formats. All data formats
can be viewed by swiping across the screen to the le or right. The screen position dots,
circled in Figure 3-2, indicate which of the five total formats you are viewing.
A
B
C
D
Figure 3-3. Other data formats
In Figure 3-3, the following formats will display by swiping le once:
• A. Dierential and Cumulative Normalized Counts
• B. Environmental Data Table
• C. Cumulative Normalized Counts Real-Time Graph
• D. Cumulative Raw Counts Bar Graph
Dierential count () refers to a number of particles of a specific size that are found in
one sample. Cumulative count (∑) refers to a number of particles of a certain size and
larger that are found in one sample. Normalized counts refer to the total particle data
counted in a unit of volume. Raw counts refer to the total number of particles counted
during sampling and are unitless.
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