USTER HVI 900 - Micronaire Module

USTER® HVI 900 Instruction Manual
Uster Technologies, Inc. Chapter 1
Version 4.0 (1.99) Introduction - Page 1-4
♦ The comb track is now enclosed within the Length/Strength cover.
To access it, lift the door located on top of the brusher and place the
fibrocomb in the track. The Length/Strength start button is then
pressed to initiate the measuring process, or it can be automatically
prompted using the software.
♦ The main power and blower switches are located on the
Length/Strength Module plexiglass cover.
♦ The vacuum box has been replaced with a lint/waste box and
blower system. The lint/waste box is located behind the left door of
the Length/Strength Module cabinet. The blower can be turned off
when not required for measurements.
♦ Two buttons, located on both sides of the Color/Trash mechanism,
must be pressed simultaneously to initiate the Color/Trash Test.
5.5 Micronaire Module
Micronaire is measured by relating air flow 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 and is protected by an acrylic guard (the optional bar code
reader can be attached to it). The testing chamber for micronaire
measurements is located directly below the electronic balance.