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|  DSH 716
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| Probe impedance for plug discharge test
! W6 d% K/ Y+ l0 F* n/ R0 b) i0 F: b | 9.1.6 (IEC 60065) 22.5 (IEC 60335) 2.1.1.7 (IEC 60950) 6.1.2, 6.10.3 (IEC 61010) + any other as applicable! v. A+ _1 {$ b1 x2 b" w' n3 A K
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Question:5 m) h. d0 c) E: L U- o' \
When the plug discharge test is performed using a voltage probe and oscilloscope for direct measurement of the voltage decay, what probe impedance shall be used to ensure uniform and comparable results?
8 ]' l. B8 x' R$ W) w: B @; E/ SNote: IEC 60950-1/2005 specifies 100 M ± 5 M in parallel with an input capacitance of 20pF ± 5 pF.# n2 K0 L; M: p2 @
Decision:6 V$ G' U$ i7 U C2 e/ ~/ k5 s) g" Z( t
If the relevant standard does not contain contradictory requirements, a voltage probe having an input impedance of 100 M or greater in parallel with an input capacitance of 25 pF or less, shall be used for this test.- F# }6 A8 v9 U; P: @% o0 [( X& B
For other (automatic) equipment with special measurement techniques equivalent measures shall be taken to ensure comparable results.
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发表于 2012-9-8 13:00
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