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Making measurements
Measurement - Duration
The Measurement Duration settings can be used to separately specify both the red
and blue light measurement durations.
Mastersizer 3000
Section/option
Description
Red measure-
Background measurement duration (seconds)
ment duration(s)
This facility will make a measurement using only clean dis-
persant – this is then subtracted from the sample measure-
ment by the system in order to 'clean' the data. This is often
set to the same duration as the sample measurement.
Sample measurement duration (seconds)
The optimum measurement time depends on the size of the
sample, its particle size distribution and the dispersion
accessory used. If a material is monomodal its essential par-
ticle size characteristics can be captured in less time than a
material with a broad particle size distribution, which will
need to be measured longer to ensure that the coarser parti-
cles have been properly represented.
Chapter 4
Page 4-33
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