Standard Practice for Establishment of Calibration Cottons for Cotton Classification Instruments
Importancia y uso:
5.1 The purpose of this practice is to provide standardization in the value setting of calibration cotton standards to be used for cotton classification instrument calibration.
5.2 The practice provides procedures for the value setting for calibration cotton standards. These procedures are for use by cotton fiber testing organizations that establish standard values on candidate bales that will be utilized as calibration cotton standards for cotton classification instruments on the level of the benchmark cottons.
Note 1: Benchmark cottons are of high value and of limited supply. Long term accuracy and stability of the internationally recognized USDA cotton standards are dependent on long term maintenance of the benchmark cottons. Therefore, distribution of the benchmark cottons will be tightly controlled by the USDA.
Subcomité:
D13.11
Referida por:
D7139-20
Volúmen:
07.02
Número ICS:
59.060.10 (Natural fibres)
$ 954
Norma
D7642
Versión
12(2020)
Estatus
Active
Clasificación
Practice
Fecha aprobación
2020-07-01
