USTER®
HVI 900 SA
Instruction Manual
Uster Technologies, Inc.
Chapter 15
Version 4.0 (1.99) Glossary - Page 15-10
T — Trash. Appears as a report header.
Test — A measurement, either a single observation or the average of
several observations, taken by the instrument on a sample.
Test Series — A group of tests performed on a sample, for example,
the color, trash, micronaire, length, strength, uniformity, and elongation
tests performed on samples.
Trash — The non-fiber portion of cotton. It consists of stems, hulls,
whole or parts of seeds, motes, grass, sand, dust, oil from machinery,
etc. Using the video camera, all areas darker than a threshold level are
counted as trash. The discrimination between trash and background is
made on the basis of absolute reflectivity rather than trash contrast, so
variations in cotton background do not affect the readings.
Trash Area — The ratio of the accumulated areas of all the trash
particles to the area of the viewing window of the instrument.
Trash Code — The range where the tested sample falls according to
the levels determined during calibration.
Trash Count — The number of individual particles of trash in the
sample that are 0.01 inch in diameter or larger.
Unf — Uniformity. Appears as a report header.
Uniformity — The ratio, expressed in percent, of two length
measurements.
Upper Half Mean Length — The average length, by number, of the
longer half (50%), by weight, of the fibers in a sample.
USDA Color Grade — A three-digit code associated with the
Universal Standards of American Upland Cotton.
Version — The revision level of the software.
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