USTER HVI SPECTRUM, Instruction Manual, Page: 21 / 230

USTER
® HVI SPECTRUM
Instruction Manual
Uster Technologies, Inc. Chapter 1
Overview • Page 1-7
7
HVI SPECTRUM
System Modules
The
HVI SPECTRUM
system is housed in two floor-standing cabinets
(three units if you have purchased the
HVI SPECTRUM II
with the
additional Length/Strength and Color/Trash modules).
•
One cabinet contains the Length/Strength, Micronaire, and
Color/Trash modules.
•
The other cabinet contains the computer and the control box.
•
If you have purchased the additional Length/Strength and
Color/Trash modules, they will be housed in the third cabinet.
Included with the system is an IBM flat screen monitor and a color ink jet
printer. The monitor displays the menu selections, operating
instructions, and test results. As tests are completed for each sample,
the results can be transmitted to the printer and/or an external computer
system.
7.1 Micronaire Module
Micronaire is measured by relating airflow resistance to the specific
surface of fibers. An air stream is passed through a known mass of
fiber confined in a chamber of fixed volume. The pressure differential
across the chamber is then related to the specific surface of the fiber to
determine the micronaire value for cotton.
Before a sample is placed in the micronaire chamber, it must be
weighed. A precision electronic balance is provided to weigh the
sample. The testing chamber for micronaire measurements is located
directly below the electronic balance.