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看了一下IEC 60950-1 2nd的clause 2.1.1.7裡面有一段敘述: j6 r$ X' I; [
The relevant time constant is the product of the effective capacitance in microfarads and the7 ^# X+ F3 f" Y6 @& P& \. y
effective discharge resistance in megohms. If it is difficult to determine the effective
8 Q1 f+ L% |9 j+ Y+ {capacitance and resistance values, a measurement of voltage decay at the point of external8 a3 T$ p# q. d' ^
disconnection can be used. When conducting the voltage decay measurement, the result is
G; h' S/ w0 dreferred to an instrument having an input impedance consisting of a resistance of
7 K6 h8 M+ h6 n! M100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.
5 ~& @/ `& D( X2 ~ D8 N/ I不知道這算不算有要求 |
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