USTER HVI 900 - Page 231

USTER® HVI 900 Instruction Manual
Uster Technologies, Inc. Chapter 10
Version 4.0 (1.99) Synthetic Fiber Testing - Page 10-19
4.5.5 Front Position
Front Position should be left at 120 unless the sample near the comb
prevents the beard from entering the optics cleanly (i.e., thick areas may
jam). In this case, the front position can be changed to 160 to provide
more room for the sample near the comb to enter the optics.
4.5.6 Strength @ %Elongation
This is the percent elongation at which the secondary strength
measurement is calculated. In some situations, this may indicate the
blend ratio of the sample.
4.5.7 Work @ %Elongation
This is the percent elongation at which the secondary work measurement
is calculated. In some situations, this may indicate the blend ratio of the
sample.
To change the value of any of the items on this menu, follow these steps.
• Select the item from the menu using the arrow keys, then press the
ENTER key.
•
A window is displayed with the name of the parameter to be
defined. Type the new value, then press ENTER. The window will
close and the FIBER DEPENDENT INSTRUMENT CONSTANTS MENU will
display with the new value displayed beside the parameter.
• If you want the value to remain unchanged and have not typed
anything in the blue box, simply press ENTER to return to the FIBER
DEPENDENT INSTRUMENT CONSTANTS MENU.
• If you accidentally enter a value in the window, use the backspace
key to delete the information you typed, then press ENTER. The
original value will remain.