USTER HVI SPECTRUM - Changing the SCI Equation; Length (Inch); Table 10-3: SCI Equation for no Color or Trash Measurements

USTER
®
HVI SPECTRUM Instruction Manual
Uster Technologies, Inc. Chapter 10
Bale Manager • Page 10-21
For example:
Property Range
Length 5/16 - 1 3/8 inches (23.8 -
34.9 mm)
Strength 18 - 36 grams/tex
Micronaire 2.8 - 5.8
4.4.5 Changing the SCI Equation
The following equation should be used for installations when the HVI
SPECTRUM instrument has taken no color or trash measurements.
Constant -322.98
Strength 2.89
Micronaire -9.03
Length 43.53
Uniformity 4.29
Table 10–3: SCI Equation for No Color or Trash Measurements
If it is necessary to change the equation, the following
steps are required:
1. Estimate a typical value for that parameter.
2. Add the result to the coefficient and the typical value to the
constant term.
3. Replace the coefficient with zero.
It is not recommended to change the other SCI
factors unless extensive fiber-to-yarn experiments have
been carried out over an extended period of time using
advanced statistical analysis methods.