Connector for Cambridge / LOM-510a Micro Ohm meter - Page 1
Forum section: electronics / testgear

author: nikonoid
author_rank: Regular Contributor
timestamp: May 20, 2017, 05:00:15 pm
content: I have a Cambridge / LOM-510a meter, but I do not have leads for it. I was able to just plug pins into connector to verify performance. Now I would like to make a proper set of leads.Would anyone know the proper connector type for it and possibly specific connector that might offer low emf capability.I would also appreciate any suggestion on a source for good shielded wire to use for kelvin clips. Thank you.

author: radhaz
author_rank: Regular Contributor
timestamp: May 20, 2017, 07:03:48 pm
content: http://www.ietlabs.com/pdf/Manuals/LOM-510A_im.pdfThe connector looks like a 5 pin DIN plug. Maybe this?https://ast-labs.com/shop/kelvin/kelvin-clip-5-pin-din-plug-lcr-meter-test-probe-2-ft/

author: nikonoid
author_rank: Regular Contributor
timestamp: May 22, 2017, 03:03:29 am
content: These look right, the only thing is I need the male connector and these are female. The search continues....

author: korlatos
author_rank: Regular Contributor
timestamp: May 22, 2017, 04:47:14 pm
content: This connector is what I used - it fits perfectly.www.digikey.com/products/en?keywords=CP-1060-ND

author: Shock
author_rank: Super Contributor
timestamp: May 23, 2017, 01:41:03 am
content: If you are still looking for the test clips here are some I recommend, these should take shrouded or unshroulded banana plugs.http://www.ebay.com/itm/142267585778Here are some new leads I've found but not tried. They are unguarded/shielded if that makes a difference to you, but look better than 90% of what is out there.http://www.ebay.com/itm/332008183641

author: nikonoid
author_rank: Regular Contributor
timestamp: May 23, 2017, 03:11:42 am
content: Thank you, korlatos and Shock.The connector looks like a direct fit. It is nickel plated.Do you see any thermal EMF effects with this meter or is switched mode canceling them out effectively?Currently I am using Pomona 5940 (http://www.pomonaelectronics.com/pdf/d5940_100.pdf) with Keithley meters and that set seems to be excellent.If thermal is no problem I am considering building a shrouded set to go from DIN 6 connector to banana plugs. This way I can measure standard resistors as well as use clips like Shock suggested.I am also considering building low EMF binding posts right into the body of the LOM-510a meter, so I can use existing clips. Any reasons not to do that?

author: Shock
author_rank: Super Contributor
timestamp: May 23, 2017, 05:30:42 am
content: Did you see Robrenz's threads and videos on his precision probes, cables and modification for a pulsed/hold measurement switch?https://www.eevblog.com/forum/testgear/ie/https://www.youtube.com/user/ROBRENZ/videos

author: korlatos
author_rank: Regular Contributor
timestamp: May 23, 2017, 03:47:50 pm
content: I don't see any thermal EMF effects, but I am only using switched mode. I made an adapter box with banana jacks for it - here is the photo of it measuring a 1 milliohm resistor:

author: HighVoltage
author_rank: Super Contributor
timestamp: May 23, 2017, 06:43:15 pm
content: I have the LOM 510 and use this connector:Amphenol Tuchel #T3374-501

author: Shock
author_rank: Super Contributor
timestamp: May 23, 2017, 10:00:53 pm
content: Quote from: HighVoltage on May 23, 2017, 06:43:15 pmThat is the one Robrenz used? Does it fit okay without modification? I was wondering if the collar interferes when it's plugged in.

author: nikonoid
author_rank: Regular Contributor
timestamp: May 24, 2017, 06:44:49 am
content: Thank you, Guys. I did watch most of Rob's videos with fascination. I even have a milling machine. Unfortunately my skills do not compare to Rob's.I do like the idea with junction box. It offers a lot of flexibility between Keithley meters and this box.I will be ordering stuff tomorrow.