USTER
®
HVI SPECTRUM
Instruction Manual
Uster Technologies, Inc. Chapter 8
Reports • Page 8-5
2.3 Changing the Pre-Defined Categories
When the categories are defined, the highest value of the first category
is the starting point at which the intervals between the categories are
added. The operator must determine what that interval will be and how
many categories are necessary to cover the range of measured fiber
properties. Cotton is categorized based on where the property's
measured value falls within the established categories.
The CATEGORIES screen (refer to Figure 8-5) is divided into three major
columns that are used to determine the category range of each
measurement taken by the
HVI SPECTRUM
system. These are Highest
Value of First Category, Interval, and Number of Categories.
• Highest Value of First Category—This is the value at which the
fiber property's first category should end. All samples that have a
measured value at or below this value will be included in this
category.
• Interval—This is the range or width between categories. The Data
Manager uses intervals to determine where each category begins
and ends. Sample test results are assigned to categories according
to where they fit in the categories.
Intervals between categories differ according to the fiber property. If
the intervals are small, an excessive number of categories might be
created. Having large intervals between the categories for yarn
spinners may not allow good control of the variation within a mix or
between mixes.
• Number of Categories—Each fiber property can have up to 10
categories. In order for yarn spinners to keep warehousing as
simple as possible, the number of categories should be limited to the
smallest number reasonable for the range of cotton in inventory.
o Enter the numbers in the appropriate columns according to your
specific needs. When finished, select the OK button to save the
information.
Reports and graphs can now be designed in order to meet particular
requirements and tests.
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