FED-STD-228A
5. RESULTS
5.1 Calculation. The size of the yarn in cotton wraps or servings of the specimen shall be calculated as
follows:
Size of yarn = 0.015 x N x L x P
W
where:
N=the number of ends of yarn in covering
L=the length of the specimen, inches
P=the ply of the cotton yarn
W=the weight of the specimen, grams
5.2 Unless otherwise specified in the detail specification, one specimen from each inspection unit shall
be tested.
5.3 The size of the yarn in the wrap or serving of the inspection unit shall be the result obtained from the
specimen tested.
5.3.1 When more than one specimen is tested, the size of the yarn in the wrap or serving of the
inspection unit shall be the average of the results obtained from the specimens tested.
5.4 Yarn size of the yarn in the wrap or serving of the inspection unit shall be recorded to the nearest
whole number.
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