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|  DSH 716
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| Probe impedance for plug discharge test
2 ^5 i1 B. F: {3 ]1 {6 ? | 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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$ V8 q" |7 w6 s' j( NStandard(s): No. Year3 K w2 ^5 s' k; T9 q8 z1 x
IEC 60065& a; }* t7 t# q4 v! \
IEC 603355 U; c2 q6 M: p/ ~+ L0 n; i
IEC 60950+ U. y. v2 n% d' o" T
IEC 61010
, ? U* N# ` k2 A& l: ?8 m5 H+ any other as applicable8 |/ w- Q1 M" C. \
DSH-
9 {: [9 I. G6 g" S3 I% [5 y0716
a8 h/ y1 j1 \; s" T# \1 W20082 ?' p/ R- B+ Y( U% ~8 S6 A; |; h4 {
Category:
; J! s- B8 Z. h: jHOUS, MEAS, OFF, TRON,' P" j. e1 P4 L6 b8 B3 e
Various…/ v$ ?! t7 o) f/ G8 m# x
Subclause(s):0 h& e1 C- R1 d W
9.1.6
3 N6 n% U- Y N$ i2 Z' t& z6 i9 q& v22.5+ r, q3 p8 l# G; G; }: ?( [
2.1.1.7! W5 f4 W( E/ D7 [) N$ v
6.1.2, 6.10.33 l1 D+ J4 U' b* D1 |5 |
…* i" w; t3 l( I
Developed by: WG2, c6 C4 M6 ?% c5 T
WG4/ |: F% [* u+ {5 t3 ^) J6 x
Subject: Probe impedance for
9 J% t/ a" s: G. uplug discharge test
' O) x4 h9 A2 m* n' l/ H: |8 wKey words:9 A; ^: C4 a& k7 {0 K9 k
- Probe impedance
6 U- Y" `' |! Z3 D: Q4 X- Plug discharge$ ^1 I8 ^. p' X
- >= 100 M5 e. n/ B5 o4 s6 F0 K" N0 A
- 25 pF or less
5 Y/ x; C0 e% lDecision approved at the
. y# e) u# Q) Z2009 CTL Plenary Meeting
) m4 Q Z! m' k% v( l3 hQuestion:5 E: j, l. ^, _6 m9 i4 v+ h
When the plug discharge test is performed using a voltage probe and oscilloscope for
: |# J$ X" J7 l- y/ w8 A+ P1 edirect measurement of the voltage decay, what probe impedance shall be used to ensure
) _% P' P* L) R, x8 Buniform and comparable results?
2 W6 g4 q$ w( r1 aNote: IEC 60950-1/2005 specifies 100 M ± 5 M in parallel with an input capacitance of 20pF ± 5 pF.: ^* t0 l' ~5 F( M' z$ h+ Y
Decision:2 Y% I5 t/ z0 Y) V# d3 k
If the relevant standard does not contain contradictory requirements, a voltage probe p& W* \3 B8 y/ r5 B6 ~ T
having an input impedance of 100 M or greater in parallel with an input capacitance of
5 d% u- G$ O! z/ a/ A: o+ W25 pF or less, shall be used for this test.
* B: o3 E2 O2 J6 iFor other (automatic) equipment with special measurement techniques equivalent
% A0 g- \" o7 C4 C2 W% P/ K' l n& |measures shall be taken to ensure comparable results.
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发表于 2012-11-6 13:45
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