DSH 716 Probe impedance for plug discharge test

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DSH 716 - q1 a% Q) \; \* V8 p: _) a

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 $ i; \2 D' `7 F2 h; @

2 d+ P; w5 e1 V3 i8 N+ MStandard(s): No. Year
IEC 60065
IEC 60335
IEC 60950
8 V; w  O. N  K+ J* GIEC 61010
+ any other as applicable
DSH-
2 z! C* s" p7 j& Q- S0716
2 S1 a& J! w- g# h2 S% l/ p2008
" x: ~8 w5 r' o$ P, f* j. R1 J0 FCategory:
" c5 \0 q4 X8 b+ k8 I: ~/ \HOUS, MEAS, OFF, TRON,
Various…
0 T  m4 X/ e# x. `+ VSubclause(s):
9.1.6
22.5
2.1.1.7
+ e6 S% \8 V" @) l: |6.1.2, 6.10.3
…
" [$ P4 i1 T+ G, f3 {7 r5 _Developed by: WG2
- D2 s$ H7 m: a! N7 O. iWG4
4 d3 J) T% S0 S' S, PSubject: Probe impedance for
' w: o' q1 I2 P( z( `plug discharge test
Key words:
( `% V! y& _- V- F6 D. D- Probe impedance
- Plug discharge
; Z) S4 k1 Q( G' T4 I- >= 100 M

8 T4 |. D* }/ o- 25 pF or less
" @6 {* u4 l3 J, E- R1 dDecision approved at the
2009 CTL Plenary Meeting
Question:
& t- U3 o& X8 Y3 Z2 AWhen the plug discharge test is performed using a voltage probe and oscilloscope for
" Q$ n8 I5 H2 e/ wdirect measurement of the voltage decay, what probe impedance shall be used to ensure
7 S- a% z& x+ E& Euniform and comparable results?
! f& u3 a4 K0 A4 MNote: IEC 60950-1/2005 specifies 100 M
± 5 M
in parallel with an input capacitance of 20pF ± 5 pF.
Decision:
If the relevant standard does not contain contradictory requirements, a voltage probe
5 B; u" K8 M4 `9 t/ X- j+ g' vhaving an input impedance of 100 M
or greater in parallel with an input capacitance of
' s. G5 C8 ^; i+ o8 a+ ^- z, v2 k25 pF or less, shall be used for this test.
For other (automatic) equipment with special measurement techniques equivalent
measures shall be taken to ensure comparable results.

; K$ z/ i" ~0 a. Q; A. X