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|  DSH 716# Z* s2 {- ]2 X; Y. R$ a
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| Probe impedance for plug discharge test+ b8 ]' _/ a4 ? d2 e# L8 }
| 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
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8 l8 K7 ? J0 U- S/ zQuestion:) S" ?8 P0 G6 O1 x+ s( ]
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?
& R l; Y7 a8 @Note: IEC 60950-1/2005 specifies 100 M ± 5 M in parallel with an input capacitance of 20pF ± 5 pF.
{+ D H( H4 U2 gDecision:
# } r4 Y e8 u1 xIf 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.
% W6 L- t( p# C. ^" tFor other (automatic) equipment with special measurement techniques equivalent measures shall be taken to ensure comparable results.' g: m: _: E& K3 p& t" U9 B5 x7 M
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发表于 2012-9-8 13:00
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