USTER HVI 900 - CSP Regression Coefficients

USTER® HVI 900 Instruction Manual
Uster Technologies, Inc. Chapter 4
Version 4.0 (1.99) Status - Page 4-28
The Uniformity standard value will change depending on whether ICC
(ratio) or HVI (index) cotton has been selected as the Calibration Mode.
The Length standard value will change depending on whether English
or Metric has been selected as the Length Units measuring system. The
choices are shown in parentheses beside uniformity and length.
4.18.1 Changing the SCI Equation
The SCI Equation may be modified for installations where no Rd color
data are available. This requires that the following actions be taken.
1. Estimate a typical average value for the Rd of your cotton.
2. Multiply that Rd value by 0.65 (e.g., 74.0 x 0.65 = 48.1)
3. Add the results to the -412.7 constant (e.g., -412.7+48.1= -364.6)
4. Change the Constant Coefficient (from -412.7 to -364.6)
5. Replace the Rd Coefficient with zero.
4.19 CSP Regression Coefficients
Count Strength Product (CSP), or Break Factor, is a calculated value that
is based on regression analyses and is used to predict yarn strength.