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看了寒烟翠以下链接的文章后,真是受益颇多。只是对试验稳定条件建立时所对应的时间没有明确的定义。$ D- u' M0 \: N
http://www.angui.org/read.php?tid=8740
8 s# S0 s: v D/ I: L2 c1 _. x在有些标准中有定义:
; `; `! o$ ^- }2 c1.引用kuiyin001 \Hand-held appliances are operated for 20 min.
9 [8 `. A. x) E* F8 [+ N- E' {Other appliances are operated until steady conditions are established.--60335-2-32 章节11.73 ]2 b" k- a1 J; G- K3 T a& r6 Q
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2.The temperature is considered to be stabilized when three successive readings, taken at intervals of 10 percent of the previously elapsed duration of the test but not less than 5 minutes indicate no change.---UL859 /37.1.10% q6 m: R, D0 Z. j- w( \7 O* a
3.引用caballo3157+ N: {6 M3 f. c( J0 c, Q( N
IEC60598:8 C) \) b- n, t% C0 q9 S6 z
12.4.1 f Measurements shall not be taken until the luminaire has stabilized thermally, i.e. temperatures are changing at a rate less than 1 °C per hour.
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21.1.6 A thermocouple-measured temperature is to be considered constant if three successive readings, taken at not less than 15-minute intervals, indicate no upward change.8 H m2 C% q C( l3 T2 d* X
UL1278:: S' j: S/ X. g6 a, @
39.1.8 To determine whether a heater complies with the requirement in 39.1.1, it is to be operated continuously until constant temperatures have been reached. A temperature is considered to be constant when three successive readings, taken at intervals of 10 percent of the previously elapsed duration of the test (but not less than 5-minute intervals), indicate no change.$ T% g* G+ n4 `2 l+ u& g
4. 引用寒烟翠:所谓的稳定的意思是一个小时内温度上升不超过1度就可以停止测试,当然是指所有的点;不知是通标EN60335中哪个章节?5.UL1082第33.1.8条等等- Q R4 r6 w$ X5 C% L: R, K
请各路高手多多指点及补充。 |
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