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|  DSH 716
$ {# \ w; b! h; W1 F5 K2 G$ B! I7 b% l& }0 `
| Probe impedance for plug discharge test
" u. Q/ W: N. n$ 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 applicable8 R" a0 g+ \$ g6 T
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5 G. D c' I7 sStandard(s): No. Year9 H" Y- i) B2 u* h* D4 X
IEC 60065+ ^, z: ~. p0 f- f' x
IEC 60335. s5 |" e# i7 h) r. P+ o) D+ u
IEC 60950$ c& N, j: ~$ H$ b
IEC 61010
1 Z; O1 X" T2 q7 c' c8 H' m, w( S+ any other as applicable2 B% V& l$ c5 r+ n$ n, V+ Y( T8 X
DSH- \3 q) x9 I- }4 g' N
0716
: ]7 H1 X# t2 k5 O5 z+ ^' X4 [7 b$ r2008
/ A3 f6 A- ?8 E+ JCategory:
: c A- w$ h! Z; p8 Q5 U t5 L! ^HOUS, MEAS, OFF, TRON,* {/ f9 d; G2 {# X
Various…
4 e* t2 j9 ~6 C. CSubclause(s):
- e% ?) B1 U- M2 t/ f- x% z+ h9.1.6
% z5 R/ M, Z2 ]5 h! z22.5
$ q# {4 F- |( b& `3 ]' t3 b1 h2.1.1.7
: z# P U- M4 b9 {) S& Q* p1 O% d* t6.1.2, 6.10.3) k. G1 c* B/ G
…
- K9 |% y+ S5 G6 H ]0 q' jDeveloped by: WG2: o9 E# ]) @, \3 [# J9 C% W
WG4
1 e2 w' y0 T* t& B4 u6 ^3 ASubject: Probe impedance for$ c: T z Z* X; p' U: X9 J
plug discharge test8 Y0 ^: D; N& T) W8 A; t9 F
Key words:
$ s! ~0 j3 M i$ w ~- Probe impedance
2 V9 a: K& [* T- Plug discharge3 i( F7 f6 k3 K1 e& @
- >= 100 M L/ v$ h* ~8 j
- 25 pF or less
: P0 ~) L" q/ e1 ~) d I' eDecision approved at the6 P2 g b; k {; B: I6 Y; }
2009 CTL Plenary Meeting
$ n7 O1 s4 A. XQuestion: o7 U. z4 e6 B3 R! w9 a1 \
When the plug discharge test is performed using a voltage probe and oscilloscope for
; @4 v3 D& z+ D$ sdirect measurement of the voltage decay, what probe impedance shall be used to ensure' u q7 }3 |% P* T) \& Z5 a
uniform and comparable results?9 C, p6 m$ Y8 x- M% G( A" [+ I6 G
Note: IEC 60950-1/2005 specifies 100 M ± 5 M in parallel with an input capacitance of 20pF ± 5 pF.7 e7 a, z6 b+ {: J, {
Decision:
. i. n N% [# P, |0 \3 BIf the relevant standard does not contain contradictory requirements, a voltage probe8 i, G6 A* u; E2 |" C8 l* {
having an input impedance of 100 M or greater in parallel with an input capacitance of
& m1 }, h8 b2 n9 w25 pF or less, shall be used for this test.
' X' v5 K0 A1 E3 C2 fFor other (automatic) equipment with special measurement techniques equivalent$ Z" _4 G) [7 f, I
measures shall be taken to ensure comparable results.; r1 r! J! Z9 d+ y; s
8 d0 S$ d0 q. s6 E( q/ u
+ M# r+ h/ L; ^0 F% A1 [3 ^
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发表于 2012-11-6 13:45
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