USTER®
HVI 900
Instruction Manual
Uster Technologies, Inc.
Chapter 5
Version 4.0 (1.99) Calibration - Page 5-13
♦ The chosen tolerance value may not be realistic when
consideration is given to the fact that cotton, even calibration
cotton, is variable.
If a "Fail" condition exits, the Cotton Calibration for Short Cotton Screen
reappears, and 12 more tests for short cotton must be performed until all
samples pass.
If needed, pressing the ESCAPE key can interrupt the calibration
procedure.
4.7 Calibration Mode
This selection alternates between ICC and HVI.
♦ HVI (Upper Half Mean Length, Uniformity Index)
Measurements are reported in terms of mean lengths.
♦ ICC (Spanlength, Uniformity Ratio)
Measurements are reported in terms of span lengths.
The software automatically changes the regression coefficient uniformity
value for the Calibration Mode selected.
Note: When the calibration mode is set at ICC, use International
Calibration Cottons for Length/Strength calibration. When the
calibration mode is set at HVI, use HVI Calibration Cottons for the
Length/Strength calibration. Both calibrations are stored on disk, and
the proper calibration is retrieved to match the selected mode.
Cotton calibration is invalid if the Length Standard or Lens to Break
values are modified.
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