DSH 716 Probe impedance for plug discharge test

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DSH 716 ; z2 k  H* f, K! J- p" l

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 ; ?( w  K$ U0 ~, c2 x! [

Standard(s): No. Year
/ ?6 G! v' @( s) N! ~1 ]7 FIEC 60065
IEC 60335
4 v; y; C$ Z' f: G! a9 r1 k, ?IEC 60950
IEC 61010
+ any other as applicable
DSH-
0716
+ `+ S1 M/ K, v2008
Category:
HOUS, MEAS, OFF, TRON,
Various…
  q: \" l; A5 L, kSubclause(s):
9.1.6
22.5
4 `8 q) e! y. w" X( S* N9 ?# f2.1.1.7
6.1.2, 6.10.3
…
Developed by: WG2
- `. Q- P3 b: C/ ]WG4
, j% [3 R% m( w4 [( T1 LSubject: Probe impedance for
plug discharge test
& \/ e2 E) Y' M! W, A; s0 O& ^Key words:
- Probe impedance
- Plug discharge
. _1 `2 @  l# B5 O  z6 m- >= 100 M

% L  ^$ m1 @! s  x8 k$ v( A- d- 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
, z$ R, ?6 n, l$ Euniform and comparable results?
! k/ q8 e8 q6 \; J$ r. X6 {Note: IEC 60950-1/2005 specifies 100 M
± 5 M
in parallel with an input capacitance of 20pF ± 5 pF.
Decision:
5 V4 v" [7 `. c9 NIf 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
measures shall be taken to ensure comparable results.