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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:" ~, U; D5 ^" j! @$ E5 M
The relevant time constant is the product of the effective capacitance in microfarads and the* d. K. c7 R3 | ^$ g2 c
effective discharge resistance in megohms. If it is difficult to determine the effective+ ]6 M4 A( t, g; Y0 |( e
capacitance and resistance values, a measurement of voltage decay at the point of external
( c) X+ H" W" _& ldisconnection can be used. When conducting the voltage decay measurement, the result is5 g6 I8 @ m9 g# _! a z
referred to an instrument having an input impedance consisting of a resistance of
3 v5 D7 g( K2 A8 M5 c: M! W1 I100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.
! `* h4 U5 c1 \# Z, ^- w/ {不知道這算不算有要求 |
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