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|  DSH 716
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" T1 w0 n9 K! P8 L u" F | Probe impedance for plug discharge test" ~1 z6 Z7 R. }4 h
| 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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5 R, |5 Z; m! i& C1 ?) l7 g jQuestion:; c. _0 y- }% J1 T6 c
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?; b/ A8 s! C! k* `
Note: IEC 60950-1/2005 specifies 100 M ± 5 M in parallel with an input capacitance of 20pF ± 5 pF.
% M3 o, m' A6 GDecision:
* U" g# f8 q9 |( H0 O# X0 eIf 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.
/ @3 E% i+ m: S+ I8 RFor other (automatic) equipment with special measurement techniques equivalent measures shall be taken to ensure comparable results.* ^8 C; T' z z
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发表于 2012-9-8 13:00
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