Re: Nové dětské hodinky Xiaomi Mi Rabbit Watch 4C umí videohovory i 4G (Hodnocení: 0)
Od: Anonym - Čtvrtek, 16.09. 2021 - 04:02:33
IEC 60794-4-1-22:2017 defines test procedures for establishing uniform environmental performance requirements for:
1. Fibre optic cables for telecommunications equipment and equipment using similar technologies, and
2. Cable with both optical fiber and wire.
Fiber optic cable
Throughout the document, the term "optical cable" may also include optical fiber units, microtubule fiber units, etc. For reference guidance on all types of test methods and general requirements and definitions, see IEC 60794-1-2. The second edition cancels and replaces the first edition published in 2012. This is a technical revision. The second edition includes the following major technical changes related to the previous edition:
1. New test method, named F16-combined flow (drop)[E14 in IEC 60794-1-21];
2. New test method F17- cable shrinkage test (fiber protrusion);
3. New test method F18- mid-span temperature cycle test.
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