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本帖最后由 shuaijiachen 于 2016-8-26 22:17 编辑
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请教各位大师关于UL859:2012中section 44 的温升测试方法问题。我看标准很有歧义,公司做法跟我的理解好像不一致!
F/ `# z: X! P( J7 A. u0 S D标准原文:
* y$ n( a+ g7 c44.1.19 An electrical heating element intended for application to the hair is to be loaded with a moistened1 v+ N8 f3 }+ ^% W( G, |+ ^
cloth and then operated until the moisture has been evaporated and the heating surface of the unit has
+ y+ ^8 {) }5 B. ~5 _% Pattained a temperature of 204°C (400°F). Following a 2 minute period with the unit disconnected, during
( w0 g6 Y$ I2 |3 e+ h8 @0 Uwhich it is to be reloaded with another moistened cloth, the heating and evaporating operation is to be) I: B3 n; v4 h+ m4 [
conducted a second time. The complete cycle is then to be repeated again. Temperatures are to be
1 v B' n0 g5 k' b- k1 gmeasured throughout the test. N% b( H) ^& w1 ]5 F" g0 @
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( `# Q. u: \, X4 d5 z E44.1.21 For an appliance in which clips to be applied to the hair are heated by an external heater, the2 W' T$ o9 }* M/ E9 w
test is to consist of operation of the appliance until temperatures are constant, with the clips in place on
9 N& H5 g3 {* v, |the heater.
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疑问如下:
) g" s8 C9 U' Q, d; h7 s1,直发器和卷发器的温升测试方法是一样的吗?具体步骤是怎么样的?. V) R( ~# {3 Z# j3 a6 D. Q
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2,我看标准理解是:直发器和卷发器测试方法一致,发热板上夹湿布,开始上电,直到蒸发完成且发热板表面温度达到204度时,断电;停止2分钟,期间换上第二块湿布,再次上电,直至温度达到204度,完成测试(总共测试2cycles)。这种理解正确吗?难道只做2cycles/换2次湿布就可以完成温升测试了?好像这样温度都没有达到稳定状态。
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% U _ H% {9 N* ]" D( q3,标准说达到204度后断电,换湿布,那么如果我们的产品发热板表面温度没有达到204度,那什么做测试?. W- Q: N8 L6 x: s2 L/ Z; _
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4,为什么44.1.19中是测试2cycles,而44.1.21中却说是要一直工作到温度稳定状态?这两个条款是针对不同产品吗?指哪些产品呢?1 m5 b- V) }3 W, ` b9 A# C
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