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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:
. W. Y) W" R' J) {' q, @The relevant time constant is the product of the effective capacitance in microfarads and the
, [, s7 u+ W. u z9 deffective discharge resistance in megohms. If it is difficult to determine the effective2 O2 X* j1 s- s& ^
capacitance and resistance values, a measurement of voltage decay at the point of external1 i% L. { Q0 A) [: Y+ D% A
disconnection can be used. When conducting the voltage decay measurement, the result is
% M% P0 c5 `2 o. k- Xreferred to an instrument having an input impedance consisting of a resistance of
0 d+ \$ R2 v) h$ i2 ^8 I100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.
/ D r+ ?% B- I% U不知道這算不算有要求 |
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