Kelvin clips - Page 1
Forum section: electronics / testgear

author: Giallograle
author_rank: Contributor
timestamp: November 07, 2024, 06:50:32 am
content: I need some Kelvin clips for a used Agilent 34401A multimeter, through hole and tweezers for SMD.I'd like decent quality, and as I'm in Asia, I'll be looking on Taobao. Are there any good-value brands to look out for?Thanks!

author: squadchannel
author_rank: Frequent Contributor
timestamp: November 07, 2024, 06:54:48 am
content: ETA ETA3108not bad for the price.https://en.tw-eta.com/index.php?c=category&id=22

author: Giallograle
author_rank: Contributor
timestamp: November 07, 2024, 11:32:17 am
content: Good value, but unshielded?Have I missed something?

author: HighVoltage
author_rank: Super Contributor
timestamp: November 07, 2024, 12:00:41 pm
content: Quote from: Giallograle on November 07, 2024, 11:32:17 amWhat are shielded kelvin clips?

author: coromonadalix
author_rank: Super Contributor
timestamp: November 07, 2024, 12:42:11 pm
content: the 5th wire, some are coax shielded and all 4 probes shield are connected together (5th) to a ground body of the instrumentas for efficiency

author: squadchannel
author_rank: Frequent Contributor
timestamp: November 07, 2024, 12:49:56 pm
content: I don't know what you mean by shield kenvin clips, but usually coax cable shields are used with a guarded(BNC GND ring) on the meter side and unconnected on the kelvin clip side.the 34401, it is a regular 4mm banana, so you can cut a high-quality banana cable(pomona etc...) and connect it to the kelvin clip.

author: tszaboo
author_rank: Super Contributor
timestamp: November 07, 2024, 01:10:13 pm
content: Quote from: coromonadalix on November 07, 2024, 12:42:11 pmWhere do you connect it on your multimeter?

author: AVGresponding
author_rank: Super Contributor
timestamp: November 07, 2024, 01:37:44 pm
content: Solartron 7075 has a 5-pin Fischer or Lemo connector with the guard being one. Some other older meters, like Fluke 8300A iirc just have an extra banana/binding post

author: tszaboo
author_rank: Super Contributor
timestamp: November 07, 2024, 02:21:36 pm
content: Quote from: AVGresponding on November 07, 2024, 01:37:44 pmSure, and the old 3458A at work had that.How about the Agilent 34401A like the OP has?

author: Kean
author_rank: Unknown
timestamp: November 07, 2024, 02:44:36 pm
content: Quote from: tszaboo on November 07, 2024, 02:21:36 pmThe 34401A and 34465A manuals mention this in the sectionLow-Level Measurement ErrorsQuoteFor reference, the Keysight Kelvin probe set P/N 11059A uses RG174 cable with the shields terminated to the 5 banana plug (open at the Kelvin clips), and an extra alligator clip at the other end.They are quite expensive, but I bought mine a long time ago when they were significantly cheaper (but obviously not as cheap as decent Chinese ones).https://www.keysight.com/au/en/product/11059A/kelvin-probe-set.html

author: Giallograle
author_rank: Contributor
timestamp: November 12, 2024, 06:51:18 am
content: Thanks everyone.After ordering the ETA4551 (Kelvin clips to 4mm plugs, unshielded), I eventually found the ETA3206 adapter plug - 4mm plug to 4mm socket suitable for sheathed connectors - onwww.tw-eta.com. ETA has a shop on Taobao where I got them for $1.5 each which will allow the use of the usual test leads across devices.Lots of other useful leads in a wide range of formats, and test fittings on this site, eg BNC set to SMD so I'm ordering a few more leads.

author: timeandfrequency
author_rank: Frequent Contributor
timestamp: November 12, 2024, 08:02:52 pm
content: Hello Giallograle,Check out thissmall clip with a strong spring.