4 wire measurement (Kelvin clips) - handheld LCR meters

• 4 wire measurement (Kelvin clips) - handheld LCR meters
  Posted by bozidarms on 20 Dec, 2016 09:11
• Hi to the group,
  
  on some sites  can bee read that DE-5000 LCR meter is capable for 4 wire measurement, in contrary Agilent U1733C not.
  Can someone, please, explain why - both LCR meters have the same  3 connections: plus,  minus  and  guard?
  
  Thanks in advance
• #1 Reply
  Posted by PedroDaGr8 on 20 Dec, 2016 19:15
• Quote from: bozidarms on 20 Dec, 2016 09:11

  Hi to the group,
  
  on some sites  can bee read that DE-5000 LCR meter is capable for 4 wire measurement, in contrary Agilent U1733C not.
  Can someone, please, explain why - both LCR meters have the same  3 connections: plus,  minus  and  guard?
  
  Thanks in advance
  

  
  On the Der EE, the slots are actually two connections in one. They are a kind of clip, where each side of the clip is a part of the five wire connection (traditional kelvin four wire plus guard). The adapters use a double sided PCB that slides into those slots breaking it down into the individual connecitons.
  
  You can see more in my teardown here:
  https://www.eevblog.com/forum/testgear/der-ee-de-5000-unboxing-and-teardown/
• #2 Reply
  Posted by TurboTom on 20 Dec, 2016 19:27
• Before buying any LCR meter with one of the Cyrustek chipsets, and if the somewhat higher spending is not an issue, I would strongly recommend the Applent AT826. After I purchased one of these for my "basement lab" and showed it to the engineers at work, we meanwhile bought there two more since all the users were really amazed about these instruments. Moreover, the AT826 comes with a set of kelvin clips and a really decent pair of SMD tweezers which already makes the price look much more competitive. At least I never regretted the money spent on that instrument since it's always been a joy to use. Accuracy and measurement ranges are really great.
  
  Cheers,
  Thomas
• #3 Reply
  Posted by TimFox on 20 Dec, 2016 21:52
• On the DER DE-5000, when you plug in one of the auxiliary cables into the slots, using the banana jacks only for mechanical support (plastic pins in the mating connector) you have the four wires needed for a Kelvin connection.  The alligator-clip connector connects two wires to each clip at the clip.
• #4 Reply
  Posted by bozidarms on 21 Dec, 2016 00:41
• Thanks for responses, i was just curious.
  Besides, decision is already  met before - Agilent,
  but this  Applent AT826 seems to be very interesting.
  By the way - my "lab" is also in basement
  
  Regards