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|  DSH 716
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7 t! _. g2 Z8 c6 u2 }+ v | Probe impedance for plug discharge test7 w8 M6 t$ f l# S% x
| 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) |4 f! m# Y& _( N7 W
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( w. H% ~, v0 H2 U; ^Question:! d* x" A1 Z6 P0 Q
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 M2 t6 b2 u1 u4 \Note: IEC 60950-1/2005 specifies 100 M ± 5 M in parallel with an input capacitance of 20pF ± 5 pF.
+ C0 S) b; u% U1 x' Y2 wDecision:; G- j, J) c+ Z9 a
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.9 B! r/ i# X( V2 Y. i* r% Y: Z
For other (automatic) equipment with special measurement techniques equivalent measures shall be taken to ensure comparable results.: U/ h# `/ o/ ^& Y8 }+ Q4 k8 F
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发表于 2012-9-8 13:00
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