DSH 716 Probe impedance for plug discharge test

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DSH 716

Probe impedance for plug discharge test

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

$ D4 z7 |% M# @" b9 @
2 X% r3 w( X4 `Standard(s): No. Year
3 ^+ D) m' b# W7 o" Q5 ?, WIEC 60065
2 Z3 d! g& a; G; `6 A, _( KIEC 60335
$ @/ ?- E2 T3 u) f% b+ rIEC 60950
8 n) I' S1 v: h8 [$ r% h, |) \IEC 61010
+ any other as applicable
DSH-
2 P- [- ]! B- p/ l4 B0716
% S9 L3 g: r8 x* p2008
Category:
HOUS, MEAS, OFF, TRON,
Various…
' B* I2 C$ g. O2 FSubclause(s):
* J( c) K9 H$ @9.1.6
  I: U7 w7 S( k: S! X; h22.5
2.1.1.7
; n) W# D  G6 s! Z6.1.2, 6.10.3
…
Developed by: WG2
$ f8 P5 Y9 M( ~. ?! G% ]4 tWG4
$ R3 Y) s/ Q2 S! H# qSubject: Probe impedance for
. K2 V- ?* v- w0 w( oplug discharge test
$ W1 D) S) h. gKey words:
7 C0 f: ^! i' M% E* u* d5 w( J- Probe impedance
( g- M: h6 T" H+ @* x/ ?. o5 @2 D8 S- Plug discharge
- >= 100 M

  M0 Z, q6 g6 d  s- 25 pF or less
Decision approved at the
) y" d( m: D* c' z6 X2009 CTL Plenary Meeting
6 d9 B; Y% ?, Y5 M1 w9 `. VQuestion:
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
/ [# V: r8 i+ Xuniform and comparable results?
Note: IEC 60950-1/2005 specifies 100 M
± 5 M
in parallel with an input capacitance of 20pF ± 5 pF.
Decision:
. T  a9 ]$ R2 ^+ u) [, ZIf 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.
For other (automatic) equipment with special measurement techniques equivalent
$ z1 B) |' k1 X4 X) p8 y% smeasures shall be taken to ensure comparable results.
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