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标题: DSH 716 Probe impedance for plug discharge test [打印本页]
作者: 小米    时间: 2012-9-18 11:27
标题: DSH 716 Probe impedance for plug discharge test

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DSH 716
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Probe impedance for plug discharge test
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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& S! f' _# j  V
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Standard(s): No. Year
; s! f1 |( e/ M8 l& P/ ^, b+ ]2 wIEC 60065" I* n' m/ O. o) m* n/ ~6 O
IEC 603358 l; `$ ~" @: ?
IEC 60950' l( ^$ e9 ]( r
IEC 61010
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DSH-
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' T$ ^& [6 j. v2008, t5 t+ R$ B) l# J7 ^7 U/ Q7 H
Category:( G! e3 ]+ |$ {7 Y) O* m) [" ^% U8 B5 v
HOUS, MEAS, OFF, TRON,- t: M- C) M  \; M* B
Various…
" a. p5 y% H/ d  s. u  {, D6 CSubclause(s):
2 J0 A# ^" ?- k4 T9.1.6, \" [7 {  i$ E* N) x0 w
22.5  U* v3 ~7 M, l' C' P, H
2.1.1.7
4 j0 b, _, y$ D/ u' b6.1.2, 6.10.35 W8 D) `) F4 G) x, F7 N" |' T
…
2 b: Y& N. }0 |0 T" o8 H% hDeveloped by: WG2
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Subject: Probe impedance for' g) ]4 k4 j$ n0 t3 B  i
plug discharge test$ |( U9 d' l! T: |
Key words:
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- Plug discharge4 [3 A0 W6 Q" G3 _1 d6 Y
- >= 100 M& p; `3 {+ g+ r7 T8 m+ d
- 25 pF or less
0 Z7 O( i& W, V) [5 \/ cDecision approved at the
' C, t8 F8 s* B( }% {- l" A- }2009 CTL Plenary Meeting
% E3 ~, O7 b: p9 W& f" jQuestion:/ P/ W. k7 l( S2 E) u% ?5 s% J
When the plug discharge test is performed using a voltage probe and oscilloscope for4 @$ _3 Q( m% i2 P5 a, F0 P$ b
direct measurement of the voltage decay, what probe impedance shall be used to ensure& w9 m1 k9 n' _* b% L
uniform and comparable results?
+ U5 @4 i% _; |" ~Note: IEC 60950-1/2005 specifies 100 M ± 5 M  in parallel with an input capacitance of 20pF ± 5 pF.2 {! Z/ K6 ^; k/ w4 t0 b
Decision:
" E/ ?" s, F$ d2 nIf the relevant standard does not contain contradictory requirements, a voltage probe1 M% }0 U( h! B" \" ^5 E
having an input impedance of 100 M or greater in parallel with an input capacitance of2 P5 v; }+ `& S9 Z
25 pF or less, shall be used for this test.
/ g  ]/ F& T# b9 s% DFor other (automatic) equipment with special measurement techniques equivalent- b, h. q$ |3 A$ H* F' m5 g+ F
measures shall be taken to ensure comparable results.# I) ]7 a5 v2 h! A( H  J+ y- d
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