Beckman Coulter Multisizer 4, User Manual

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PN A51387A
B
6-11
Analyzing a Sample
Analyzing a Sample
6
8. Select
Run > Start
on the Main Menu bar (or click
(
Start
)
in the Instrument Toolbar).
• If the Extended Size Range feature is enabled in the SOM (see Standard Operating Method:
Threshold, Current and Gain ) and the large particle count exceeds the specified threshold, a
notification dialog will appear:
• If you click “Run 60% to 80%,” then an extended dynamic range run will start and display
the size distribution from 60% to 80% of the aperture diameter. This feature is intended for
examining particles in the small “tail” of a distribution that extends above 60%.
NOTE
A 60% to 80% run uses special SOM settings which override some parameters that the user may
have set, such as aperture current and sizing threshold. To obtain results for larger particles
using customized settings, select a larger aperture tube.
NOTE
Aperture blockage is common when sample diameters are larger than 60% of the aperture
diameter. The extended dynamic range should only be used for low concentrations of spherical
particles larger than 60%. For best results, it is recommended to use a larger aperture size for
samples that contain a significant concentration of particles above 60% of the aperture
diameter.