DSH 716 Probe impedance for plug discharge test

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1 I8 N0 w/ I, x! S

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

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Standard(s): No. Year
IEC 60065
7 m+ h: Q. u2 h  }( V: RIEC 60335
IEC 60950
IEC 61010
+ any other as applicable
6 R' ?) \% |0 L/ EDSH-
0716
2008
Category:
HOUS, MEAS, OFF, TRON,
5 f) V! Z$ [- I- lVarious…
8 v& n+ y3 \& ~3 p; z2 o& H0 QSubclause(s):
- W. W/ ^, [9 v- s9.1.6
/ u. Y5 z6 j4 C/ V  s# a22.5
6 p; j7 Z1 E" K2 N7 K. J$ v2 W2.1.1.7
6.1.2, 6.10.3
…
' q0 h- F" e3 H. ?Developed by: WG2
WG4
Subject: Probe impedance for
plug discharge test
Key words:
& s3 P, G7 c+ _7 m& {- Probe impedance
- Plug discharge
3 V% c, b8 X! r- >= 100 M

1 o) N" P# x$ d- 25 pF or less
7 L+ q4 _: _. Z% }( q' ZDecision approved at the
2009 CTL Plenary Meeting
$ g9 ?: q# a0 r) ?Question:
When the plug discharge test is performed using a voltage probe and oscilloscope for
- Q; Z+ w  ]2 S- o2 E$ t& @7 B8 ~direct measurement of the voltage decay, what probe impedance shall be used to ensure
uniform and comparable results?
) c* H% J! ^# I( J2 ANote: IEC 60950-1/2005 specifies 100 M
± 5 M
in parallel with an input capacitance of 20pF ± 5 pF.
! Z* s3 S' E; E, e2 uDecision:
If the relevant standard does not contain contradictory requirements, a voltage probe
, c, V5 n; O( D8 h. o1 \4 j9 {( Zhaving an input impedance of 100 M
or greater in parallel with an input capacitance of
5 p9 G$ R, m0 K  ]  S+ ]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.



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