This part of IEC 61753 defines minimum initial test and measurement requirements and severities which a single-mode connector, either part of a pigtail, or part of a cord, must satisfy in order to be categorized as meeting the IEC standard category U (uncontrolled environment).
IEC 61753-021-3 Ed. 1.0 b:2012 History
IEC 61753-021-3 Ed. 1.0 en:2012
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IEC 61753-021-3 Ed. 1.0 b:2012
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