DSH 716 Probe impedance for plug discharge test

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DSH 716 ' W6 [/ l' {: I' l2 _1 S7 c

Probe impedance for plug discharge test ( @7 Z" H1 H( E% S3 e8 B

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

; T8 G: l; s) m' z: @Standard(s): No. Year
1 w5 @# e3 {# J  k+ j" zIEC 60065
IEC 60335
! f+ k) N% u0 {# j9 z4 `9 V) T" HIEC 60950
2 N. h# o5 z7 R% ?/ C$ oIEC 61010
$ m) z$ Y0 h! }: F0 `+ any other as applicable
3 ]8 E& I. ^; Z, p; h2 ?: gDSH-
0716
4 K! _0 w4 `7 ^( Z2008
Category:
& c5 l- c; K1 l9 i8 I3 WHOUS, MEAS, OFF, TRON,
- g) O6 N% L5 LVarious…
5 ]4 P% H% e- H* g0 R2 ISubclause(s):
3 {9 j) l8 v4 O- I9.1.6
/ B6 t5 J- L3 ]+ G; {) @+ g$ z22.5
2.1.1.7
6.1.2, 6.10.3
…
Developed by: WG2
% ]8 _: h" A" ~% [1 O, r" ^8 v# gWG4
Subject: Probe impedance for
plug discharge test
Key words:
- Probe impedance
- Plug discharge
2 r1 \6 d  x& c" M1 |- >= 100 M

- 25 pF or less
$ q9 Y0 l1 `5 p; l3 iDecision approved at the
2009 CTL Plenary Meeting
* [0 A3 ^# \4 ?& g4 P# M+ aQuestion:
When the plug discharge test is performed using a voltage probe and oscilloscope for
* c/ g! b# U: M  _1 edirect measurement of the voltage decay, what probe impedance shall be used to ensure
) Y% ]* C% O, y+ B0 e% M( muniform and comparable results?
Note: IEC 60950-1/2005 specifies 100 M
± 5 M
in parallel with an input capacitance of 20pF ± 5 pF.
Decision:
( h0 m+ P' y2 e/ C5 }' H  _* u/ BIf the relevant standard does not contain contradictory requirements, a voltage probe
0 m; Z9 x& r% R# h, g; ^0 Phaving an input impedance of 100 M
or greater in parallel with an input capacitance of
# h2 A2 `5 I5 X, r3 A25 pF or less, shall be used for this test.
For other (automatic) equipment with special measurement techniques equivalent
' x1 [3 J9 t  y1 }2 Wmeasures shall be taken to ensure comparable results.
- K5 a& G# O7 @