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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:
0 y9 Z" B2 C- _* ?+ ?The relevant time constant is the product of the effective capacitance in microfarads and the
9 g! @! G& @) [effective discharge resistance in megohms. If it is difficult to determine the effective
; N- J( {/ z9 y6 L: Ocapacitance and resistance values, a measurement of voltage decay at the point of external: A0 T- u: Z$ S5 K5 U
disconnection can be used. When conducting the voltage decay measurement, the result is0 E; n, M" D: Q
referred to an instrument having an input impedance consisting of a resistance of
' N& E' @& U3 n8 K! D100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.
3 Q2 M' A8 l8 F4 s& X7 w9 \不知道這算不算有要求 |
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