USTER®
HVI 900
Instruction Manual
Uster Technologies, Inc.
Chapter 14
Version 4.0 (1.99) Appendix - Page 14-13
10 Initial Category Setup
10.4 How the Category System Works
Each sample is placed into a Category for each fiber property. The
Category Definitions require an estimate of the average value and
range of each property for the samples being tested. Steps to determine
these values are explained in this section.
If you export the data to BIAS, you should use the same Category
Definitions for HVI 900, 940 DataManager, and BIAS Categories.
For yarn spinners, it is important to keep in mind that the number
(quantity) of Categories for each property should be kept to the
minimum required to adequately cover inventory and to allow for the
small shifts the average inventory might make over a period of time.
The Number of Categories actually used for analyzing the cotton might
not be the actual number you enter for Number of Categories.
For example, to allow for a shift in property value trends you might enter
10 as the Number of Categories. Realistically, most of your range
should fall within the middle 5 categories. If you are analyzing your
cotton by Category, you might put all samples with a value less than the
highest value of Category 3 in Category 3 and all samples with a value
greater than Category 7 in Category 7. This allows you to have only 5
Categories for the property as divisions.
From a spinning mill's warehouse storage point, it is probably not
feasible to have more than three or four Categories assigned for each
property. As explained above, this does not mean you must enter 3 or
4 as the Number of Categories.
The steps in the first part of this section outline the procedures that are
used for gathering information for initial Category analysis. The
information gathered should be analyzed to provide the information
required to define the Categories based on the range in a fiber
property.
10.4.1 Why Category Definitions Should
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