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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:8 X! x7 r" Y# c
The relevant time constant is the product of the effective capacitance in microfarads and the
& t7 ?# |$ ?6 M* Z1 P2 t" ieffective discharge resistance in megohms. If it is difficult to determine the effective& ]1 W+ t- H: S* b
capacitance and resistance values, a measurement of voltage decay at the point of external; D. X- Y# S* m, x
disconnection can be used. When conducting the voltage decay measurement, the result is" Y. N' J' b) u5 D* J
referred to an instrument having an input impedance consisting of a resistance of/ K" V2 z5 N% m K. t$ k( q
100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.
+ J- {! N" w" ~2 J8 M7 ~. ?: H不知道這算不算有要求 |
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