USTER HVI1000, Инструкция по эксплуатации

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USTER®
HVI 1000
Instruction Manual
Uster Technologies, Inc. Chapter 1
(3/08) Introduction
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Page 1-6
3.3 Color and Trash Modules
The instrument for measuring color for cotton (lightness and yellowness)
is located in the micronaire cabinet. The color and trash tests are
performed simultaneously.
The color and trash trays, where the operator places the cotton sample
to be measured, are mounted on the tabletop
(M1000).
To measure
color and trash, the operator presses the Start button (mounted flush
with the tabletop) to perform the test.
•
To measure color, the system uses a xenon flash bulb to illuminate
a cotton sample during testing.
•
Lightness and yellowness, the two color components of cotton, are
measured as reflected light passes through filters and is deflected
by photodiodes.
•
Lightness is expressed as a percent reflectance (%Rd)
•
Yellowness is expressed in Hunter's scale (+b) values.
•
These values are converted into the equivalent USDA color grade
codes that are based on the universal standards for grading
American Upland and Pima cottons, or a custom standard.
The Trash Module is an automated video image processor that measures
the amount of visible leaf or trash in a cotton sample of cotton. The
digitized image produces results for three measurements:
1.
Trash Area —the percent of the cotton sample viewing area
occupied by trash.
2. Trash Count —an indication of the number of trash particles
≈
0.01 inch in diameter or larger.
3. Leaf Grade —a code value related to the trash area and particle
count, or
Trash Grade – This value is measured by the Trash Module and
can consist of up to four alphanumeric characters, or
Trash Code — The range where the tested cotton sample falls
according to the levels determined during calibration.