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目前显示的是 六月, 2022的博文

Guidance notes for IK impact tests

  1.  When is an impact test appropriate? An impact test is appropriate for equipment likely to be used in areas with non-restricted access and where impacts are likely to occur. For equipment destined for areas with restricted access, an impact test may be appropriate but is likely to be of a lower severity.   2.  Choice of test apparatus The part of IEC60068 provides three test method which, as far as is practicable, are intended to give similar results. To obtain repeatable and reproducible results, this test is more dependent on the details of the test apparatus than is usual in IEC60068 standards. The choice of the test apparatus depends on the orientation of the surface to be tested and on the energy level. Not all methods can be used in every case. It is self-evident that a pendulum hammer can only be used on vertical surface without overhangings. Similarly, the vertical hammer can normally only be used on accessible horizontal surfaces. When the specimen ca...

IEC60068-2-68 method La2 Step-in Dust Chamber

 https://www.pegotester.com/step-in_dust_tightness_test_chamber.html#_jcp=3_18 1.   Introduction Dustp roof  test chamber is designed according to   IEC60529 for IP5X&IP6X tests and IEC60068-2-68 method La2 (constant air pressure), the object of this test is to determine the degree of protection against ingress of fine dust into electrotechnical products, like outdoor luminaire, household appliance, auto parts and other similar electrical products. This is a dust tightness test in which the specimen is exposed to a heavily dust-laden air flow containing non-abrasive powder of particle size < 75 μ m, and checking the the physical and other relevant properties of the product to provide the basis for product design, improvement and verification. The test does not simulate natural or induced environments, a vertical downwards air flow is specified for the test. Enclosures of a specified category are tested with the internal air pressure lower than the surrounding...