标题: IEC 60950-22附录D的测试问题 [打印本页] 作者: someone 时间: 2009-2-17 14:54 标题: IEC 60950-22附录D的测试问题 谁做过IEC 60950-22 Equipment to be installed outdoors中的附录D Gasket tests？ 7 Z7 E- p, L W5 Q0 o" k U3 }. P6 }+ K0 C. b# m+ l1 a3 I9 i
其中的 # a2 ~4 N9 p/ Q0 {6 B& uD.2 Tensile strength and elongation tests & m: D3 F% T( |. F% z3 jThis test is applicable to gaskets, which can stretch (such as O-rings). Gasket material, shall! R' ^! i4 S3 `& M; V
be of such quality that samples subjected to a temperature of 69 °C to 70 °C in circulating air) q: i3 b' y. K% j2 \# V4 z
for 168 h have a tensile strength of not less than 75 % and an elongation of not less than/ W: G$ f q, ~5 Z3 D7 w0 y/ x
60 % of values determined for unaged samples. At the conclusion of the tests, there shall be + s+ @& K! E9 x2 ?% ]+ c/ Lno visible deterioration, deformation, melting, or cracking of the material and the material, ?5 X# I7 y5 |# c! n
shall not harden as determined by normal hand flexing.. l1 x1 ?' j, H! y# U; ^- w