Pulse Generator RiseTime 260ps (PulseWidth 600ps) TDR - New Year  - Sale 38 $ - Page 1
Forum section: electronics / general

author: max-bit
author_rank: Frequent Contributor
timestamp: December 27, 2015, 09:31:29 am
content: Pulse Generator RiseTime 260ps (PulseWidth 600ps) TDR (based Jim Williams PG)Ready to UsePrice only 38$Shipping cost ~6 $ (5 Euro)Payment via PayPal (please contact via personal message)LasteBay auction: #262228339623

author: acbern
author_rank: Frequent Contributor
timestamp: December 27, 2015, 02:03:36 pm
content: How are you selling this into the EU without a CE mark/test? To protect yourself, you shouldn't.

author: grumpydoc
author_rank: Super Contributor
timestamp: December 27, 2015, 02:41:28 pm
content: Quote from: acbern on December 27, 2015, 02:03:36 pmIt's not clear this falls in a product category which requires CE marking. In fact, I'm pretty sure it doesn't

author: acbern
author_rank: Frequent Contributor
timestamp: December 27, 2015, 03:53:18 pm
content: Why would it not? It uses power, it is an apparatus intended for the end user (see excerpt attached).If you have another valid view, please explain, I am glad to understand.

author: c4757p
author_rank: Super Contributor
timestamp: December 27, 2015, 03:59:30 pm
content: Intended for incorporation into an apparatus => NO => excluded, it's generally not used that way. Though it's possible that one should follow the "finished appliance" path for this one, not sure.In any case, I see he's still covering his ears and ignoring the comments about how it's 1) useless and 2) dishonestly measured in terms of rise time.

author: EV
author_rank: Frequent Contributor
timestamp: December 27, 2015, 04:10:46 pm
content: Quote from: c4757p on December 27, 2015, 03:59:30 pmWhat is it for? You can not test real rise time with it!

author: grumpydoc
author_rank: Super Contributor
timestamp: December 27, 2015, 04:57:23 pm
content: Quote from: acbern on December 27, 2015, 03:53:18 pmI think you went through that decision tree following the wrong route - I would say it is a finished appliance intended for the end user.However to need CE marking it needs to be in one of the designated product categories which are listed herehttp://www.ce-marking.org/what-product.htmlOf these only "Measuring Instruments" looks at first glance as though it will apply - "Low Voltage Electrical Equipment" actually covers 50-1500V (so, anything mains powered), not battery powered devices.But measuring instruments actually covers a narrow range of devices mainly for liquid measure - seehttps://www.element14.com/community/servlet/JiveServlet/previewBody/51607-102-1-264611/CE%20Mark%20-%20Measuring%20instruments.pdfandhttp://ec.europa.eu/growth/single-market/european-standards/harmonised-standards/measuring-instruments/index_en.htmSo I don't see that battery powered test equipment would need marking.Quote from: c4757p on December 27, 2015, 03:59:30 pmTrue - you need a pulse with a duration long enough that the signal gets to a maximum value and stays there for a period of time, you can't really measure 'scope rise time with a quick blip like that.

author: acbern
author_rank: Frequent Contributor
timestamp: December 27, 2015, 10:54:04 pm
content: @grumpydocyes, I concurr, it is a finished appliance, I coppied this dwg from elsewhere, and the color marked path did apply to that, note here, sorry for confusion.The point you bring up re. CE is interesting, seems measuring devices do not apply (refers to others as you say, not even a standard battery powered multimeter would normally fall under this), and the voltage the pulse gen needs is clearly below 75V DC.That would be nice, actually, but can it be true? It would mean e.g. that any say measuring device operating from battery or a low voltage DC (example measuring amplifier...) does not need a CE mark.And what if it has a USB socket for powering (example MP3 player), why would this be CE marked (not the charger, the device itself)?

author: grumpydoc
author_rank: Super Contributor
timestamp: December 27, 2015, 11:50:44 pm
content: Quote from: acbern on December 27, 2015, 10:54:04 pmBased on the legislation I looked at something like that might not need CE marking - but I wouldn't take my word for itI looked at the CE regs last year - I was thinking about putting together some calibration checkers for PAT testers but when I looked into it the legal ramifications of putting a 1Mohm resistor in a BS1363 plug top and selling it did not bear thinking about. Unfortunately my "day job" means that I have to play completely by the rules or risk loosing my professional registration.But I did come to the conclusion that something battery powered, which was not a toy or medical device nor using wi-fi or other RF link wouldprobablybe OK without a CE mark, but then I have more than a a few such devices kicking around which do appear to carry a CE mark so either I misunderstood the legislation or there is some over-zealousness with making going on.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: December 28, 2015, 08:29:50 am
content: Test equipment is exempt, IIRC.The requirement, then, is to operate such equipment only in an enclosed, filtered environment.Tim

author: acbern
author_rank: Frequent Contributor
timestamp: December 29, 2015, 01:01:29 am
content: Do you have a reference for this other than what was mentioned above? Would be interested. For FCC, you are right, but except for reasons explained above (which still may be ambiguous) I have not seen any such excemption.

author: max-bit
author_rank: Frequent Contributor
timestamp: January 05, 2016, 09:47:18 pm
content: LasteBay auction: #262228339623

author: orion242
author_rank: Unknown
timestamp: January 06, 2016, 03:48:01 am
content: sold and i could give 2 $hits less if its CE

author: fivefish
author_rank: Frequent Contributor
timestamp: January 06, 2016, 06:25:34 am
content: Some CE on finished goods actually mean "China Export"

author: Dave
author_rank: Super Contributor
timestamp: January 06, 2016, 07:58:05 am
content: Quote from: fivefish on January 06, 2016, 06:25:34 amNope.Read.

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: January 07, 2016, 07:02:51 pm
content: Quote from: fivefish on January 06, 2016, 06:25:34 amNo, it doesn't. That has always been an Urban Legend.That's what the body that is responsible for the legislation around CE has to say about that:http://www.europarl.europa.eu/sides/getAllAnswers.do?reference=P-2007-5938&&language=FR