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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:
( A6 K" _$ a3 |5 w" pThe relevant time constant is the product of the effective capacitance in microfarads and the/ x( j! y' |: Y* }% E
effective discharge resistance in megohms. If it is difficult to determine the effective* J* A% k& y1 q& ]9 d5 ?- ?& Y& U
capacitance and resistance values, a measurement of voltage decay at the point of external
8 {% [; f7 \5 H/ H. ^disconnection can be used. When conducting the voltage decay measurement, the result is
b3 m( ?) E* a" creferred to an instrument having an input impedance consisting of a resistance of: w9 D7 E/ W3 H/ T8 s; O& B- \
100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.
2 d/ d; k& B: I+ l不知道這算不算有要求 |
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