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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:
: o1 I! q7 M( r( q/ x1 v8 iThe relevant time constant is the product of the effective capacitance in microfarads and the
3 Z7 E' ]! |6 `- G" |# eeffective discharge resistance in megohms. If it is difficult to determine the effective
# W5 q% y0 ?, }3 q. n7 E( o7 j/ x( c5 Bcapacitance and resistance values, a measurement of voltage decay at the point of external) ~$ \9 q: s/ Q' u- [! {0 u
disconnection can be used. When conducting the voltage decay measurement, the result is
Z) I. x5 g7 Yreferred to an instrument having an input impedance consisting of a resistance of
# ^+ o+ z( F1 t+ O* @100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.# A3 o& u8 x. ~
不知道這算不算有要求 |
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