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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:$ Q g% y9 v& @/ D0 z
The relevant time constant is the product of the effective capacitance in microfarads and the
+ k4 q. l: e5 Z) h7 Seffective discharge resistance in megohms. If it is difficult to determine the effective w; C1 o9 v1 e. a( X. X: d
capacitance and resistance values, a measurement of voltage decay at the point of external
7 z4 D& X2 I. O v6 _9 q- F* Fdisconnection can be used. When conducting the voltage decay measurement, the result is9 f S+ j6 p' }9 }0 r
referred to an instrument having an input impedance consisting of a resistance of- S4 U- a9 e0 F( ~
100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.+ d) [ Z9 U* u% [; N: P; Z: \
不知道這算不算有要求 |
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