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xiaoning 发表于 2016-5-26 22:18
4 C* q$ B9 U# a谢谢指教,B尺寸有个最大值和最小值,但是我们测量的时候只能有一个值,可否理解为这个实测值要介于标准计 ... $ i0 }+ s7 u/ |( C F( C
兄弟, 一切还是要看标准, 具体的测试我没有怎么实际操作过, 但是标准明确写了, B 有两个值, 一个是25度下的常温存储下的值, 还有一个Btmin 最小值(客户 宣称或者-20度), 然后你去根据下面的公式去计算出B1, 看是否符合标准要求呗.* U& I1 ?5 _6 N7 x/ D: R9 z
The following formulae apply: ; c# n R! C" V. }, p+ M# y" M
A1 = Atmax + ΔA – A25°C (tmax – 25 °C) .11,7*10–6
0 _' E% U" ~ q' m$ `0 aB1 = Btmin – A25°C (tmin – 25 °C) .11,7*10–6 + Z8 N3 D; Q9 `/ Z) N H6 T* r
Compliance is checked as follows: – Dimension A1 shall be within the limits of the corresponding dimensions according to the relevant lamp data sheet from IEC 60081. – Dimension B1 shall be within the limits of the corresponding dimensions according to the relevant lamp data sheet from IEC 60081. |
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