Ken:
Analog meters are inherently good low pass filters and will mask any high
frequency components. The same is truefor most DMMs unless they have been
specified for higher frequencies. Typically, don't expect much accuracy
beyond 100Khz for soem of the best DMMs.
You can always use a scope wi
If anyone is curious, I have a graph of the frequency response of Annex D using
an excel spreadsheet. Contact me off-line.
Regards,
David.
David Gelfand
Regulatory Approvals
Memotec Communications Inc.
Montreal Canada
---
This message is from the IEEE
Dear Ken
In EN 60950 and UL1950 appendix D you can find a description on how to
measure leakage current and the specifications for the meter. This is taken
from another standard which I don't know the number of. If you don't use a
meter with the right data you will never know what is the right
.org
List-Post: emc-pstc@listserv.ieee.org
Date: Tuesday, October 03, 2000 3:04 PM
Subject: Re: Leakage Current Measurements
>
>
>
>
>Hi Ken:
>
>
>> I found something interesting today. While measuring leakage current
with a
>> digital multimeter, I
Rich Nute
cc: emc-p...@majordomo.ieee.org
Sent by: Subject: Re: Leakage Current
Hi Ken:
> I found something interesting today. While measuring leakage current with a
> digital multimeter, I noticed a high amount of leakage. The unit
> incorporates a switching power supply, with some EMI/EMC circuitry. Anyhow,
> I read somewhere that DMMs are some times inaccur
You need to add a network in series with any meter that isn't specifically a
"leakage current meter". This human body network model is typically a 1500
ohm resistor in parallel with a 0.15uF cap. Obviously without it you get a
very much higher reading than with it.
If you did have that netwo
sday, March 17, 1999 5:00 PM
To: emc-p...@ieee.org
Subject: RE: Leakage Current Measurements
Interesting. During an audit of the facilities of a former employer, the
auditor specifically requested that we didn't use the Simpson 228 for
EN60950 because of the roll-off of the analog movemen
Hi Frank:
> Interesting. During an audit of the facilities of a former employer, the
> auditor specifically requested that we didn't use the Simpson 228 for
> EN60950 because of the roll-off of the analog movement above 100Hz. The
> suggested fix was to build the network as descri
Interesting. During an audit of the facilities of a former employer, the
auditor specifically requested that we didn't use the Simpson 228 for
EN60950 because of the roll-off of the analog movement above 100Hz. The
suggested fix was to build the network as described in the standard, with a
hi
Peter,
We use a fixture described in the EN 60950, IEC 61010 or EN50178 standards
along with an analog meter movement, as described in the standard. The
reason for the analog meter, according to the inspector is that many of the
digital meters have an aliasing problem at low frequencies. However
> A meter for IEC 60950 may not be adequate for IEC 61010,
> especially if the unit under test has a reasonably high
> frequency switch mode power supply.
The high frequencies generated in a switching mode power supply
are negligible in the presence of the mains-frequency leakage
cur
is
www.ergonomicsusa.com.
Daniel Mis
-Original Message-
From: me...@aol.com [mailto:me...@aol.com]
Sent: Monday, March 15, 1999 7:37 AM
To: ri...@sdd.hp.com; jo...@exchange.scotland.ncr.com
Cc: pe...@itl.co.il; emc-p...@ieee.org
Subject: Re: Leakage Current Measurements
ED&D Inc.
: pe...@itl.co.il, emc-p...@ieee.org
Subject: RE: Leakage Current Measurements
Date sent: Mon, 15 Mar 1999 11:50:33 -0500
Send reply to: "Russell, Ray"
> Greetings,
>
> I have used the ED&D leakage current for my previous 2 emp
.org
Subject: Re: Leakage Current Measurements
ED&D Inc. also offers several Leakage Current Meters specific to different
Standards. They are located in Morrisville NC 919-469-9434
Ed
-
This message is coming from the emc-pstc discussion list.
To cancel your subscription, send mail t
ED&D Inc. also offers several Leakage Current Meters specific to different
Standards. They are located in Morrisville NC 919-469-9434
Ed
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This message is coming from the emc-pstc discussion list.
To cancel your subscription, send mail to majord...@ieee.org
with the single line: "unsubscr
2 Mar 1999 04:38:08 -0500 (EST)
> Message-ID: <286215c2ca1ad211a13500a024535b58424...@eukscpo3.dundee.ncr.com>
> From: "Crabb, John"
> To: "'pe...@itl.co.il'" , emc-p...@ieee.org
> Subject: RE: Leakage Current Measurements
> Date: Fri, 12
Hi Peter,
We use a Fluke 8010A to measure current directly, instead of voltage. We
have correlated with UL's meters very closely & have had no disagreement
with UL, CSA, or TUV engineers.
Mike Harris/Teccom co.
tecco...@i-cafe.net
707-258-1360/fax 1361
--
> From: Peter Merguerian
> To:
We use a Yokogawa 3226 Universal Leakage Current Tester
together with a 3227 Test Box. The meter has both an "AC" and
an "AC+DC" current range, and switchable 1K, 1.5K, and 2K
input resistance. The test box has a polarity and an on-off switch to
simplify testing, and has a US mains socket into w
Peter,
We use Simpson model 229-2 even for UL1950 3rd edition and a UL engineer
told us that would be fine. However UL themself use model 228 for 3rd
edition and 229-2 for 2nd edition. We also use the in-house kit that has
been built in accordance with Annex D/G for production line. This is as
goo
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