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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:
" |- N' h' X2 q' B: |The relevant time constant is the product of the effective capacitance in microfarads and the
" b' F9 c4 m$ t. peffective discharge resistance in megohms. If it is difficult to determine the effective7 Z! }2 K l9 R N1 N
capacitance and resistance values, a measurement of voltage decay at the point of external4 M) h* W' r- [- n; ~! E
disconnection can be used. When conducting the voltage decay measurement, the result is
+ x9 p: Y" A3 g$ rreferred to an instrument having an input impedance consisting of a resistance of- e/ U" \+ o' T0 ^' c. C3 @: O
100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.: V% N5 A, Z6 O; k0 l- _4 o7 i& f) K
不知道這算不算有要求 |
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