DSH 716 Probe impedance for plug discharge test

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DSH 716

Probe impedance for plug discharge test   a' k8 S" u5 g  r7 Q

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 6 J0 w4 \+ d$ Z! _% m6 s

/ D7 o' {% ^. |2 L* V; n  wStandard(s): No. Year
* n( l* L5 l+ N' Y6 i7 M! O1 BIEC 60065
, y& A! }' x1 OIEC 60335
7 R. H: @' {) J1 c; \( D1 S1 ?IEC 60950
IEC 61010
, W9 D, K5 M" `8 b, d% F  T+ any other as applicable
DSH-
0716
2008
0 |- n( Y4 M2 V) P, X8 F# \Category:
HOUS, MEAS, OFF, TRON,
Various…
: t; S0 O4 h; c; i) B: j0 DSubclause(s):
9.1.6
22.5
2.1.1.7
9 S+ w) L0 I. C& g6.1.2, 6.10.3
' |/ t) F) p! y! f…
Developed by: WG2
WG4
% S2 o' `  ]  }  t  P4 |Subject: Probe impedance for
plug discharge test
& d0 A2 N. U& l  ]2 _4 B8 t6 [6 U/ DKey words:
" V6 _& [: N* ~% s/ T8 A. B5 }- Z* z- Probe impedance
5 v3 Q$ y5 h$ o2 `; G2 c. W% c" l# }- Plug discharge
) g3 U: J* L5 c- >= 100 M

- 25 pF or less
Decision approved at the
2009 CTL Plenary Meeting
Question:
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
uniform and comparable results?
' T0 m. v7 e/ I6 {/ `4 |Note: IEC 60950-1/2005 specifies 100 M
± 5 M
in parallel with an input capacitance of 20pF ± 5 pF.
( ^/ b* ^( n5 y9 LDecision:
. A8 `( }% k6 `If the relevant standard does not contain contradictory requirements, a voltage probe
7 T4 h5 H! m( a0 J2 k4 F3 chaving 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
: Y. P+ F( \1 `measures shall be taken to ensure comparable results.