USTER HVI 900 - Temperature and Humidity Constants

USTER® HVI 900 Instruction Manual
Uster Technologies, Inc. Chapter 4
Version 4.0 (1.99) Status - Page 4-30
Once you have established the regression coefficient values, they should
not be changed.
4.19.1 Using mN/tex Instead of CSP
If you want to use mN/tex instead of CSP, enter the following coefficient
values.
Constant -41.02
Strength (g/tex) 0.53
Mic - 6.37
Length (mm) 2.17
Length (inch) 55.11
Uniformity (Index) 0.98
Uniformity (Ratio) 1.78
Rd 0.96
b - 1.81
Trash 0.00
4.20 Temperature and Humidity
Constants
The optional Temperature and Relative Humidity probe checks the
stability of the testing environment, gives constantly updated readings on
screen during testing, and reports the testing conditions on the test
results printout. The system allows you to set limits for temperature and
relative humidity and it signals an alarm when conditions are outside
those limits.
For testing cotton, most cotton standards organizations recommend that
the instrument be operated in a controlled environment in the range of
20°C ±2°C (65°F to 72°F). The relative humidity should be 65%, ±2%.
The accuracy of the relative humidity and temperature probe is ±2% RH
from 0-100% RH at 77°F and ±1.0°F from 20 to 130°F.