Mysterious conformance mark - Page 1
Forum section: electronics / projects

author: calzap
author_rank: Frequent Contributor
timestamp: January 05, 2014, 02:51:00 am
content: I'm familiar with most conformance, warning and advice marks on electronic equipment, but there's one that mystifies me. It's a white square with a black arc running through it from the bottom edge to near the right-hand edge. There are some non-revealing letters and numerals just outside one or two edges. I've seen it on several small DC power supplies. Anyone know what it is?Mike in California

author: Rerouter
author_rank: Super Contributor
timestamp: January 05, 2014, 03:02:16 am
content: Perhaps take an image? as none of the devices i have on hand have something like you describe

author: calzap
author_rank: Frequent Contributor
timestamp: January 05, 2014, 03:40:07 am
content: OK. I put a power supply in my Epson scanner (a first for me), and the result is attached.Mike in California

author: calexanian
author_rank: Super Contributor
timestamp: January 05, 2014, 03:48:06 am
content: We need an EEV blog conformance mark.

author: Fabiusp98
author_rank: Contributor
timestamp: January 05, 2014, 02:45:44 pm
content: Good idea, "This product is EEVblog compliant".

author: lapm
author_rank: Frequent Contributor
timestamp: January 05, 2014, 03:22:31 pm
content: Actually it should say this product has passed quality review of EEVblog forum testers.

author: AlfBaz
author_rank: Super Contributor
timestamp: January 05, 2014, 03:22:54 pm
content: It doesn't seem to be any of thesehttp://www.technick.net/public/code/cp_dpage.php?aiocp_dp=guide_safetymarksYou sure it's not just a branding mark?As for eevblog compliance, any and all pcb's must use gloss black solder mask with gold silk screen

author: calzap
author_rank: Frequent Contributor
timestamp: January 05, 2014, 05:05:39 pm
content: It's possible it's a brand mark, but I really doubt it. It's nestled with all the other compliance marks, and the edge lettering appears to be a compliance or certification reference. The mark edge lettering is different on the two power supplies depicted below.OK. How many of the marks on the second power supply below can you identify without doing a net search? I've set-up an Excel-type grid system. Point totals are below. You get no points if the mark was intended specifically for the country or group of countries where you live or have lived or have worked, or if you work for a compliance or certification organization. C3/D3 is a single mark. I know them all except for C2, which is why it gets 25 pts.5 pts: E1, D2, A310 pts: A1, D1, A2, E2, B3, C3/D3, E315 pts: B1, B2, C125 pts: C2Mike in California

author: calexanian
author_rank: Super Contributor
timestamp: January 05, 2014, 06:15:50 pm
content: I think they are just making marks up now to confuse people "Well the one i need must be in there somewhere"

author: Unknown
author_rank: Unknown
timestamp: January 05, 2014, 07:07:22 pm
content: This intrigued me so I had a bit of a Google out of interest. Turns out the internet is full of idiots. Loads of articles saying 'conformance markings explained', which really means 'we know what 3 or 4 of these mean, we'll explain those and not even mention the other 15'. Dickheads.

author: Skimask
author_rank: Super Contributor
timestamp: January 05, 2014, 07:23:36 pm
content: Quote from: calexanian on January 05, 2014, 03:48:06 amhttp://eev.eevblog.com/wp-content/uploads/2014/01/DaveDukeNukem.jpg

author: Neilm
author_rank: Super Contributor
timestamp: January 05, 2014, 10:02:27 pm
content: Not all of these marks are conformance marks. The symbol A3 is the international symbol for "indoor use only".

author: calexanian
author_rank: Super Contributor
timestamp: January 05, 2014, 10:05:17 pm
content: Where is the this product is holistically balanced mark? O0

author: Maxlor
author_rank: Frequent Contributor
timestamp: January 05, 2014, 10:42:46 pm
content: Maybe it's just a misprint, and is only a part of the symbol it's supposed to be. It looks like the upper left quarter of a stylized S...

author: Unknown
author_rank: Unknown
timestamp: January 05, 2014, 10:43:47 pm
content: Quote from: Maxlor on January 05, 2014, 10:42:46 pmIt's on loads of stuff, be surprised if there was so much stuff across different manufacturers worldwide with the same printing error.

author: amyk
author_rank: Super Contributor
timestamp: January 06, 2014, 08:09:29 am
content: E1 is the noncomformant "China Export" mark...