1.1 This test method covers the classifying and counting of faults in spun yarns using capacitance testers.

1.1.1 Protruding fibers or yarn hairiness, or both, are not determined as part of this method.

Note 1—For measuring protruding fibers or hairiness, or both, refer to Guide D5647.

1.2 This test method provides for grading yarns by fault level and type.

1.3 This test method is applicable to all single or plied spun yarns from natural or manufactured fibers or blends of each.

1.4 The values stated in SI units are to be regarded as standard; the values in inch-pound units are provided as information only and are not exact equivalents.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.