Kelvin clips

[wiss]

Hi

Does anyone have opinions on these kelvin clips?
http://www.ebay.de/itm/2-Messpinzetten-2x-Einzeln-oder-Kelvin-mit-4mm-Steckern-fur-LCR-Meter-und-DMMs-/261267737565?pt=Mess_Pr%C3%BCftechnik&hash=item3cd4c54bdd

They seem to be ok (for the price).

Should I buy a pair?

[plesa]

Depends on what you are going to measure. In my next order list are Kelvin clip 6440 they seems to be fine for smaller packages.
Agilent has some decent kelvin grabbers, byt they are quite expensive.

[wiss]

I plan to use them for normal legged resistors and the like. When you want something hooked up quick. If I have a reference I can take my time and connect 4 wires

[tszaboo]

Depends on what you are going to measure. In my next order list are Kelvin clip 6440 they seems to be fine for smaller packages.
Agilent has some decent kelvin grabbers, byt they are quite expensive.

Isn't all the agilent probes nowadays re-branded Pomona probes?

[plesa]

I plan to use them for normal legged resistors and the like. When you want something hooked up quick. If I have a reference I can take my time and connect 4 wires

For such a stuff the clips you mentioned seems to be quite big. I will rather use for clips bellow
http://www.ebay.com/itm/AGILENT-HP-5090-4356-Mini-GRABBERS-IC-CLIPS-PKG-20-NEW-/321315296037?pt=LH_DefaultDomain_0&hash=item4acfe25325
They are reliable and cheap.

[wiss]

Are those kelvin?

[georges80]

OP:

That style of 'clip' is common on Ebay. Quite a few vendors sell/ship just the kelvin clips. I have a set that I wired up to use with my Rigol HP1116A power supply which has a 4 wire mode.

The clips are reasonably quality (for the price...) and are true Kelvin clips. They are LARGE - which is fine for my power supply use running a bunch of amps. I wouldn't use them for measuring anything small

... and no - the small HP/Agilent clips of the other post are NOT kelvin - they are commonly supplied with their logic analysers etc.

cheers,
george.

[robrenz]

I still have one set of these kelvin clips that I made available.

Edit: Sold

[wiss]

Judging from the picture they are 10 or 12 cm long? (2 banana-plugs)
Ok, that might be rather large, I'm not going to use them in-circuit anyway so large size would not be catastrophic, only inconvenient.

Maybe these would be better?
http://www.ebay.de/itm/newv-LCR-Meter-Low-Resistance-Test-Leads-LCR-test-Clip-Terminal-Kelvin-Test-/111050454976?pt=Mess_Pr%C3%BCftechnik&hash=item19db1f77c0

These looks cool but way too low price for 4 BNC, and the BNC would be very inconvenient for me.
http://www.ebay.de/itm/newv-LCR-Meter-Test-Leads-LCR-test-Clip-Terminal-Kelvin-Test-Line-High-Quali-/121112664114?pt=Mess_Pr%C3%BCftechnik&hash=item1c32e09832

[DmitryL]

Are those kelvin?

No, they are not. They are a high-quality grabbers, but not Kelvin type; I have a bunch of them.

[edpalmer42]

Those prices seem high to me.

A couple of years ago I bought a pair of cheap kelvin clips (they're available from multiple vendors on ebay) and added my own cables.  My milliommeter shows 0.01 milliohms when they're shorted together.  They're a bit of a hassle to solder the leads onto.  It's hard to do the job without touching the iron to the plastic.  There's no strain relief for the cable so you'll have to figure out something for that.  But, for the price, they're good enough for me.

Ed

[lowimpedance]

I have seen Agilent use 'Mueller' BU-75K clips which are compact but can be a bit fiddly stay on component leads. Which depends on how stiff the leads connecting the clips to the meter are.
 Digikey have them for US $11.30 each , others have them also.

[edavid]

Those prices seem high to me.

Me too!  Why is it so much cheaper to buy the kind with 4 BNC connectors instead of the kind with 4 banana plugs?

A couple of years ago I bought a pair of cheap kelvin clips (they're available from multiple vendors on ebay) and added my own cables.  My milliommeter shows 0.01 milliohms when they're shorted together.  They're a bit of a hassle to solder the leads onto.  It's hard to do the job without touching the iron to the plastic.  There's no strain relief for the cable so you'll have to figure out something for that.  But, for the price, they're good enough for me.

You can remove the jaw/terminal completely from the plastic shell to solder it.

[edpalmer42]

Those prices seem high to me.

Me too!  Why is it so much cheaper to buy the kind with 4 BNC connectors instead of the kind with 4 banana plugs?

A couple of years ago I bought a pair of cheap kelvin clips (they're available from multiple vendors on ebay) and added my own cables.  My milliommeter shows 0.01 milliohms when they're shorted together.  They're a bit of a hassle to solder the leads onto.  It's hard to do the job without touching the iron to the plastic.  There's no strain relief for the cable so you'll have to figure out something for that.  But, for the price, they're good enough for me.

You can remove the jaw/terminal completely from the plastic shell to solder it.

I wondered about that, but I didn't see an obvious way to do it so I decided not to 'Take It Apart!'.

Ed

[georges80]

The cheap LARGE clips like on Ebay can be dis-assembled easily. You just pull out the 'floating' spring inside and then the metal contacts just slip out. Solder your wires on and then slip them back into the jaws and reinstall the 'floating' spring without getting it into your eye

cheers,
george.

[georges80]

Here's a pic with one dis-assembled.
cheers,
george.

[edpalmer42]

Here's a pic with one dis-assembled.
cheers,
george.

Yup, those are the ones I've got.  I didn't look close enough.  I thought there was a shaft through the pivot of the connector and since it appeared to be plastic, I didn't want to take the chance of breaking it.  Oh well, I got the job done, even though it won't win any beauty contests!

Ed

[wiss]

Thanks for the tips!
You have talked me out of ordering those from ebay but I got interested in the siamese clips, I will probably try to make a pair!

[AlfBaz]

Speaking of shit kelvin probes, check out the quality assembly of these cheapies I got from fleabay




I pulled the plug out of the socket and was left with this



I shudder to think whats going on under the heatshrink

[CaptnYellowShirt]

The cheap LARGE clips like on Ebay can be dis-assembled easily. You just pull out the 'floating' spring inside and then the metal contacts just slip out. Solder your wires on and then slip them back into the jaws and reinstall the 'floating' spring without getting it into your eye

cheers,
george.

I second george.

I bought two pairs directly from China. Buy just the clips -- pay no attention to the auctions with the wires already hooked up.

Get the clips (super cheap), hook them up any way you want. That way, you'll know for sure what's what.