okay so we bought this new LCR meter and it comes with four wire Kelvin clips but
they're a little bit short and they don't work well for these capacitors
right here and a few other components I just like them a little bit longer so
what we did was we bought some inexpensive 4 wire Kelvin clips on
Amazon now I've read some reviews that some of them aren't wired properly
they're not separated top at bottom half into the actual 4 wire that they're
soldered together here and then I've also read that some of the grounds are
also attached in here so we're just going to verify that real quick when the
meter on ohms before we actually wire them in and we bought an extra one I
bought an extra one of these TL 20 ones that way I can save the original no one
will just will wire whichever set we like better into here
okay so looking at this capacitor you can see these really don't get on
there very well so we bought both these sets we weren't really sure which one
would work better I thought these might but they they actually they're not going
to get on there very well either that's going to pop off kind of do I'm not sure
how much I like that I do like these alligator clips though just maybe not
for this application so then we may we may end up just using these I don't know
that's probably what we'll do we'll test them both out but we'll probably wire
these into here one thing I should know and we'll look at it closer when we
disassemble this is the four wire leads do come together on the same bottom half
of this and aren't actually separated on this
so for super precise measurements that may be a small factor I don't think it's
going to affect us any I just wanted these longer for the most part but if
these are actual true wire true for wire they should be a little bit more precise
okay in order to verify that these two wires are separate the whole way
separate to a top half and a bottom half will use an ohm meter
well separate these and then just dome out each one and you can see you can't
really get in there very well with a meter so we'll use the help of a Pomona
panel Jack so right just go ahead and stick one on each one of those so now
that it's open and separated we shouldn't have any continuity between
the two if we do it's because they are actually soldered together here which
it's not really the end of the world for us for super precise measurements it
kind of is some people will be uptight but considering these are inexpensive
$20 leads it wouldn't make me terribly upset but they are advertised as true
for wire so let's see if they really are to do that you go ahead throw the
alligator clips will not close the shrouds on those fluke leads and then
just we're set up on homes already just go ahead and clip the each side okay you
see we're still reading open so they are true for wire once he removes that clip
we should read a dead short and we do and if this was a relay at work I would
toggle it several times but it's not so we can trust that okay so right now we
do know that it is a true four wire just for the heck of
let's find out if that gray does correlate with that grade in order to do
that through your clip back in your poker chip and now we'll leave the black
lead on here let's just ohm out to the the top and the bottom and see which one
ohms out okay so it ohms up to the bottom let's go to the top and it
doesn't okay so unless it's just coincidence the the gray does correlate
with the the gray on the bottom so that one checks out we'll just do a quick
check of this one make sure everything's good on it just do the same thing pull
the jacks out throw them in there okay so we do read a short and we do read and
open okay so let's check again and see if that gray does correlate with that
one so throw up a chip in two separate them and it looks like it does go to the
top cool okay so these are $20 Kelvin clips and honestly I'm kind of happy
with the quality the the leads feel good the silicon alone feels good yeah it's
not a bad quality at all for the money spent for the house if you're using them
at work or what now you should always buy the top quality but for the house
these will be fine alright so we're happy with those let's now the concern
is with these what I'm most concerned about is that ground let's go ahead and
as we unscrewed that let's take a look at this so you can see the shield is
folded back over and pin to this so it should on out to this casing go ahead
and do that right and get the clips off and let's check actually you can leave
one a clip on clip right here and then just see if you all out there
what you should okay so the shield is attached to that like it should be now
this is the which one is that is that the black one yeah that's the black one
so now what I'm curious to find out does that shield is it connect it inside here
I don't really want to cut this heat-shrink open if I don't have to so
just go ahead and I let's put the meter lead in there see what we read okay so
it's not the shield is separated so that's good
the next test we want to do is we want to make sure that both of these are
actually separate from both of these so throw a poker chip in the middle bones
should we open and it does so if we can pull that poker chip out we should read
a short and we do okay so that one reads out good - these are electrically
isolated from each other the top goes to one side the bottom goes to the other
it's a true for wire and the shield is not connected in here so let's just take
out test out the red one and then we'll know that these are good and then we'll
go ahead and take this apart and we can see it's it's open so the shield is not
connected either one of these keep that right there and I'll just move over to
the other one same thing okay so we're good on that so just throw a poker chip
between them okay so they are separate now let's see if we have a short and we
do so we know they're good all right cool so that's money well spent then
question is which one do we want to wire up here it's probably going to be this
set and then what I may do is actually I don't think they would all fit but it
would be kind of cool to attach these in here so I could plug different ones in
true for wire if you don't want for wire you can just use your regular lead like
this and then put you know different accessories on the end like alligator
clips which I believe for all our measurements is going to be fine mainly
I want this for capacitors and to do some motor test the motor test I may
actually want to for wire for low ohms and inductance but for the capacitor I
don't really believe I need that I just want to know the ESR maybe the
dissipation factor that's that's about it I don't really think we need true for
wire for any of that but it doesn't hurt to have it like I said for the motors
and whatnot so I would like to instead of just putting my fluke leads in here I
would like to have some different options here and it would be cool to to
plug them into a true for wire because they make these same thing with this
style plug as a matter of fact we just ordered a said today
you