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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:
: |* ]; u7 |+ _2 s, w0 D7 P: L3 @The relevant time constant is the product of the effective capacitance in microfarads and the( i: G! {; F) C/ k& L
effective discharge resistance in megohms. If it is difficult to determine the effective- x+ y( C4 T/ y8 V
capacitance and resistance values, a measurement of voltage decay at the point of external; v% C1 ]$ ]+ a# G6 z
disconnection can be used. When conducting the voltage decay measurement, the result is
8 Z# g7 p/ V0 t/ r }. Greferred to an instrument having an input impedance consisting of a resistance of' C3 }$ ^ P$ `/ H3 h* A
100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.
. t1 O9 t4 I8 A: o5 Q- N5 A. }7 |不知道這算不算有要求 |
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