Hi, Welcome to Tear Down Tuesday It's not every day we get to tear down a Fluke multimeter. but yes, we've got one. The new Cnx 3000 and it's wireless. So we got all the wireless attachments.

We got five items. Can you believe it? You know what we say here on the Eev blog. Don't turn it on, Take it apart and here it is in its nice little padded bag. We've got the Fluke Cnx 3 000 M We've got the Cnx I 3000 Wireless Flex Current Clamp We've got the Cnx uh, A3000 Wireless AC clamp and you guessed it, they keep calling them the 3000.

Get out of here Tight fit. We've got the Cnxt 3000 which is a K type thermocouple temperature wireless adapter and we've got the Cnx V3000 which a wireless Ac voltage. That's all it does. It just measures Ac voltage and we've got all the bits and Bobs as well, including this, uh, flexible current clamp.

How do you do it? There we go. just pops out like that goes in there, you lock it and that's actually a current clamp up to. uh, that's the I 2500-1 2500 amps. So we going to attempt to, uh, tear down? Well, we can't tear down this.

This is actually molded sealed. so let's tear down these and see what we got. A new fluke Beauty And here it is: the Cnx 3000 Wireless Multimeter. Check it out! It's got a dot matrix display I Won't turn it on cuz that's not in the spirit of Tear down Tuesday But there it is.

Tada It's got the big new fluke button on it for the wireless button. but apart from that, it's kind of like the equivalent of the fluke. uh, 70 series. Really? So it's effectively like a wireless um, 70 series.

That's what they want. Uh, you to think. Anyway, like instead of buying just a regular um, you know, Fluke 70 series electrical multimeter, eh, for a bit more, you buy one of these instead and if you want, then you can buy all the Wireless accessories later. That's their plan.

Anyway I Think so let's take a look at it. It's uh, changed a little bit. This won't be a review of course. I Don't like that tilting baale there.

that's a bit of a eh and once again, that just uh, that does, actually, uh, break off can actually break that off. It's got a magnetic hanger as you saw hanging around my neck at the start of the video. All of these have magnetic hangers on them and uh, couple of screws in there. They probably self tappers again, but uh, we'll find out and let's have a look inside the battery compartment.

Oh look at that. Oh, look at that. It just like Rises up. Watch this.

Oh, look at that. Beautiful and that just pops out out there. And three Ablea batteries. But what's missing here? Fuse access.

Ah fail. They put some uh, little spongy stuff. It's not actually rubber, it's it's just like foam, uh stuff around the outside of that. So that's what gave it that little hydraulic uh lift thing that's just to keep out, uh, dust and crap out of this thing.

But there you go. Looks like the uh I do like these. the um, um, uh battery contacts there are solded directly down onto the board. You can see that in there.

so let's whip it apart and have a look. Yes, it does feel real nice and solid like a proper fluke should, so no worries there at all folks. They usually don't disappoint on that front, so whip these out. These feel like soft tappers to me.

Yeah, self tappers. They're real. Yep, the uh y the classic fluke self Tapper The same design as all their other ones, so they haven't haven't decided to change that at all. Interesting to see I mean this is a cat 4 rated 600 volt Cat 4.

so I'd expect to see some decent uh, input protection circuitry, decent clearance, maybe a blast Shield or two, and a, uh, lots of big Mau protection. all the usual. Jazz Of course the two HRC fuses. they'll all be in there and uh, not much else.

probably powered by an MSP 430 again, would be my guess like they do on the uh, other flukes. So why not? So let's try and get this sucker apart. I Hate that you have to take off six self-tapping screws just to change the fuses. That's just you know that's really not on.

Um, they should have designed that. uh, bigger. You know they could have had two fuses across there. They could have designed a bigger battery compartment.

Bob's your uncle? maybe had the batteries across that way so you didn't need as much height? I Don't know they could have done it if they really wanted to, but hey, Tada There we go. There's not much doing. There's no internal shielding on the back side of the case there, so it's all on the board. Look at that.

Not much at all, but hey, you don't need need much in a modern fluke multimeter. And of course, there's one thing. I Uh, forgot to mention on the front of this thing, it does Milliamps only. There's no micro amps.

Of course it's not designed as an Electronics up multimeter, so that's fair enough. But there's no 10 amp range at all. It's just milliamps. That's it.

400 milliamps Max There's probably a couple of ranges in there, you know, 44400 or something, but oh man, come on. So the input front end here isn't very exciting at all. Yeah, we've got the usual uh, 4, 40 milliamp, uh HRC fuse. here.

we've got uh, the input themister. We've got the input protection resistor. We've got our fixed current shunt there because, well, you don't need a 10 amp and multiple Uh current shunts to be switched into place. Um, and we've got our three Ms there.

and well, that's all there is to it. It's pretty boring actually. We've got a uh, little um isolation Shield there which is a little bit of a blast Shield I Guess you could call it from the thermister here and but it's just you know so it doesn't get uh, bent over onto the Precision high value resistor in there. there.

It is metal shielded of course. um to help get the noise down. but yeah, that's about it we've got. That's probably the uh, that might be the wireless under there.

We've got that under the under. a shielded can. We might be able to get a look at that later. I Don't know.

There's some circuitry around here, obviously that's connected into the battery there. We've got a little uh, uh, polyfuse there and we've got a DC to DC converter just around there and some regulation there by the looks of it. So that's all pretty standard. And up here we've got a little module which looks like it's in a socket.

We'll take a look at that in a minute, that's just wiggling around there. I don't I Don't like that at all. That thing could vibrate out of there. Not too happy.

Um, hey, no surprises. MSP 430 uh processor there. We've got our big buzzer there. We've got a uh Secret cowb button.

Looks like there's a little cow pad. Uh, there did. I Was there a matching uh button on the back little secret button there? No that. no, there's nothing there.

So yep. I don't know why they've done that as like a button uh type pad there. But anyway. um, there's the Um in circuit programming.

uh JTAG Port there for the MSP 430. We've got this going off here. It's probably for the uh backlight and then this going off to the LCD display by the looks of it. and really, there is not much in there at all.

As I said, I Do not like this module one bit. Look, it's just sitting there. You just wiggle that back and forth that would easily vibrate loose. Trust me.

I'm not putting much force in that at all. What's But anyway, um, there we go. There's our um little uh antenna down there and uh, that is our uh Wireless module inside that can. Looks like we can't get that off unless we desolder the can there.

Yeah, I don't know what type of connector that is. um I don't know. I it's probably not a custom. Maybe it's a, you know, it is uh designed for something else, but if anyone knows what that connector is, let us know.

So if that other little plug-in module was our wireless interface, what's going on under that can down in there with that uh Qfn package? I'm not sure maybe the uh true RMS converter or something. I Can see a couple of uh large SMD caps under there. but and the input Jacks there. Absolutely nothing, uh, special at all, but there's nothing wrong with them.

They're not quite as rugged as the other, uh, some other fluke meters, but uh yeah, they're not too bad. They, of course, everything's just beautifully sold and they're really, you heard that one go crack I'm assuming and uh I don't see a shake proof washer under there though. but uh, that is pretty darn good. They go in there nice and solid.

although that that is wiggling. is that me wiggling the unit? or is that yeah, that's me wiggling the whole thing. There you go. They're pretty good.

We can see down inside the Jack there. they're all nice and solid. No problems whatsoever. Not the crap, uh, split type.

good solid input Jacks and just as in the side, you can see the solid metal uh, molded in threaded insert in there. Very nice for the input jack. I Like it. Now you notice something here.

Small attention to detail they've paid in the design aspect of this thing. Here's the common terminal. Here's the Milliamps terminal over here and this is the voltage terminal. now.

the voltage terminal is the only one that has this raised bit of plastic around it now that is not uh, for support or uh, anything else. It's actually a little arc shield between the pointy, you know, the sharp points of the metal contact down there and the fuse here. So there you go. They've just put a little bit of attention to detail.

they've gone aha, we can have. potentially there's that air gap there. It's quite significant, but it's a potential arcing point. so we'll just put in that little bit of extra plastic around there just for the sharp.

Corners because, uh, primarily, um, sharp Corners are where um, arcs are going to. high voltage arcs are going to appear from and and they can just, uh, you know, kill that by just raising that plastic there. It doesn't cost them anything, but you got to think about that at the design stage. And it's not just, uh, that either.

They actually back it up with check it out, a matching one in here as well, that, uh, they've got that Shield there and that one. So really, um, you know, this is why it's Cat 4 rated because there's no way it's going to Arc From that Jack in there, over to that fuse holder in here, it's just not going to happen and you'll notice some other uh, design and build quality things here. They've also got these shields that just hold in place around the mounting posts down there. They've got them on, uh, those sides of the unit.

So when you put this in here like this, you put in there like that. it fits over that mounting post and just provides a more rigid, uh, in, you know, less movement room so that when the thing gets shocked, it uh, you know, and the case maybe gets, uh, warped a little bit. It's You know that mounting post just isn't going to break off and the mounting post is molded integrated with the side of the case there and it's you know. It really is quite solid.

They've uh, you know, the mechanical person who's uh, who's designed that really knows what they're doing I really like it. And there's the wireless module there. and of course it's a a Zigby uh type. It uses the Zigby hardware layup, but it does use a proprietary uh fluke protocol layer called the FW CS so they don't, um, plan on opening uh, that up.

but they say it's not very difficult if you want to. uh, if you did want to tap into it or something like that. So there's our little uh, surface mount Zigby antenna there and it's all under the shield and that is bummer, Soldered down? well. I've got a soldering Ir and there's no huge surprise is there? It's an offthe shelf Texas instrument CC 2530 F18 and that is a Zigg Control chipset.

It's actually an 8051 processor, 128k of Flash and all sorts of paraphernalia built in. We'll take a look at the block diagram in a second, but you can see the uh, they've got an oscillator there. It's probably 32 mahz oscillator. Is that another Uh Crystal there? Possibly for Real Time clock and up Here we've got our programming interface, so you could just solder a connector directly onto that and hack this thing if you were really that way inclined.

But uh, apart from that, there's not much else on there. There you go: there's the 32 MHz Crystal oscillator and there's the other Crystal there and it's got 24324 marked on it. and uh, I Entirely expected that to be a 32.768 khz watch crystal there, but um, it maybe it is and it's just not marked differently. I mean there's 32 there? so I don't know? Um I Think it's probably got to be.

And here's the block diagram for this thing. As you can see, it's got pretty much everything but the kitchen sink. We've got reset Watchdog timer, two oscillators uh, marks and calibration on chip uh, voltage regulator uh Brown Out we' got sleep timers, power management, a memory memory arbitrator, an 8051 CPU core 8 Kobes of SRAM This one has 128k of Flash and we've got interrupt control. There's a fairly powerful Dma in there.

There's an analog comparator, there's an opamp. there's a 12-bit Delta Sigma ADC It's got AES encryption and decryption. Um I don't think this thing uses the encryption at all I think it is uh sent as plain text. so I you know, so you should be able to read it.

If you can intercept it, you can probably uh, read the data. It's got the radio registers uh, Csma. all that sort of stuff. Radio interface uh D Modulator ADC rece chain the frequency synthesizer the transmit the modulator.

it's all there. Fifo and all the frame control to handle all that. plus a couple of uarts throwing in couple of four timers in there. and Bob's your uncle and these little surface mount Crystal packages seem to be all the rage these days.

I I Rather like them, actually. they're quite neat and here we go. We've got the board out, got a bit more circuitry on the back, which we'll take a look at, and uh, here's the LCD and interestingly, the LCD just sits in there like that and it's just uh, pushed in place, held in place with that foam back in. that's very unluk like.

um, you know I would have expected to see that on cheaper meters I Don't know why they've decided to, uh do that, but anyway, they have. It's a um Lcd's manufactured from hand. Tronics They're a large, uh manufacturer of reputable manufacturer of LCD displays. hello I can see myself hello and there we go.

It's uh, chip on board. you can see, you can can probably see the little chipping there. There we go, it's all potted up in there, but that's a this is a dot matrix uh display of course. I'm not sure of the exact resolution on it, but uh, there you go.

Got a huge, uh, even backlight on the back of that thing. so I expect that to be nice and even. but uh, apart from that, there we go. we'll take a look.

Got a bit more circuitry on the boards up here and uh, standard fluke rain switch by the looks of it. if we take a look down here there, it is standard Fair they haven't uh, they haven't rocked the boat there at all. It's exactly the same as uh, the mechanism they've been using for a long time. Not a problem.

So let's take a look at the boards. and of course we find our standard Diode Bridge plus one extra diod in there for our fuse protection as well. When the fuse blows and they've used some large mou resistors there, the old mou package I do like the mou package and they've used that to get high voltage of course, have put them in series there. There's where that uh blast Shield goes around there like that.

We've got a guard ring going around that that's our um, thick film hybrid resistor Network on the top that's also shielded, but apart from that, there's not much else on here. There's a couple of little uh components around couple of LEDs You'll notice that uh, note the soft button up there. check that out. They've just uh, put the Led directly in the middle which of course lights up through the uh rubber through the clear rubber uh button on there.

but they've got still got the same uh dual like you know, similar sort of uh pattern on their Serpentine pattern. that uh allows them to detect the carbonized rubber on either side which presses down and presses the button. but apart from that, it's boring folks. Sorry, there's nothing under the rubber at all and this thing hasn't been released very long.

but check it out, they're up to to rev 8. There's another guard ring up there, don't know what that's guarding but uh, something under that can H there we go. I've lifted up another shield and it's the LT flk2. it's a fluke Uh custom special under there so that would be doing uh the you know the input uh, switch in and uh, probably uh, some true RMS stuff as well.

And on the bottom of the range, switch there very nice. uh. dual wipe contacts. not a problem and um, looks like very good quality gold plating on there on the board as you'd expect.

Sure, it's very thick, so there you have it that's inside the fluke Cnx 3000 and it's a classic, excellent uh fluke design and build quality. I uh, rather like it and in. Interestingly, um, if you remember my fluke 28 Series 2 Um, these inductors here seem to be a weak point in the design in terms of uh, uh, shock because that inductor actually broke, uh, twice on me. very similar inductor cuz Ferite is quite, uh, brutal.

So you know, in terms of uh shock, you know that's probably one of the first things to go. actually. Surprisingly, um, would be that Ferite inductor there as you can. and if you haven't seen it.

uh, semi fluke 28 uh Torture video where I take it through a canyon and drop it, do all sorts of things. Yeah, that sucker broke twice. So there you go. But anyway, thumbs up.

That is. uh, superb classic fluke. build quality come can't be beat. And yes, folks, it does work when we turn it back on.

Tada There it is with its dot matrix display. Not too happy with that. But yeah. anyway, so this is the CX A 3000 Wireless clamp meter Uh, 400 amps.

uh Cat 3 600 volts Cat 4 300 volt rated of course. Classic. Uh, you know, clamp configuration like that? We'll get in there. You can have a look at the laminated cores inside there, so crack this open.

And by the way, um, yeah, these things do have data login and the data login is done, if you're curious, is done internally to all of these remote units. The uh, Cnx 3000 multimeter itself does not have logging capability. it just acts as a star. n uh, the uh.

the star controller for the wireless network and that's pretty much it. So yeah, the multimeter itself. no data loging. but these things do have data loging built in.

so let's check it out. And uh, we open this up here: Battery Compartment TDA Two Aa's nothing very exciting there. three screws and we'll lift this sucker right out there. you go.

you can see the uh, laminated core right down inside the clamp there and that goes all the way. There's multiple laminations in there on both sides and that goes all the way around to the sensor which will be in the main unit itself. Ah, look there we go. We have have the same module again.

We got a matching module. we won't have to take that apart again. I'm sure. look at that.

Quite nice. uh. build quality there I Like it. that's a real nice Big Spring Clamp mechanism I Don't think that's going to fail anytime soon.

and yeah, I Have no doubt that modules are absolutely identical. Um, you know, might have some firmware differences of course, because this isn't the uh star Hub controller or something. or maybe it is identical. Uh, firmware? I Don't know.

but yeah, um. I'm not going to take the can off that that'll be absolutely identical. Same connector system and as with the Cnx meter itself and all, uh, fluke meters. uh, lovely deep ridges on the case there that go around inside there just in case there is any uh Arc over or anything like that.

it's not going to blow your hand off, it's going to be, uh, any explosion is going to be pretty well contained inside the case now. Sorry folks, but I don't seem to be able to prize these two Hales apart here. Maybe they glued or thermally bonded or something like that after manufacturer. I Mean, you know it, it wouldn't surprise me in fact.

I'd uh, expect them to be uh, uh, fused together somehow. So sorry. um I'm not going to be able to show you the uh Hall sensor in there. Bummer.

Ah, actually sorry, that's not going to be a hall sensor because uh, this is not a DC Uh current clamp. It's AC only. So that's just going to be a current Transformer in there. Not a hall effect type, but that's a fairly high quality, uh construction here.

Really, it should be fairly reliable. They've got a threaded metal insert down in there. nice big, uh, solid. uh Threaded Screw which you know holds the main uh pivot point for the main clamp down there.

so it should be. uh, really rugged and last, uh, quite some time and we' found the memory there. It's an ATL 25 DF 081 and that's an 8 mbit flash memory, but it's very low voltage. It's 1 65 Vol um.

interface there. so looks like we have a bunch of uh, test points there there. Maybe for production or uh, programming something like that I don't know. um.

soldering of course. Absolutely. First class. Maybe we' got some sort of uh.

amplifier or something there? perhaps? um, but there's yeah, there's not much on here. um, some more test pads down there, but there not much on the top side here at all. So uh, we got to find the processor probably on the bottom side and that chip. There's got Uh 25 TI AFB on it.

so I'm not entirely sure what that uh sucker is. Um, it looks like it's you know, it looks like some sort of uh regulator or something like that based on the huge uh uh tracks coming out of it and relatively huge. and the uh caps as well. Huge huge big ceramic cap there.

I've got a tanem on the input. so yeah, that's probably some sort of uh regulator. So let's pop this thing over and uh, see if we can look at the processor on the bottom. and there's the big fluke button on the Uh front there and you can see it lights up.

Of course, there's there's the LED in the center of it. and then they've got uh, no less than four pads there. So that's going to be a pretty reliable uh switch on that sucker. And there's the input there from the sensor and uh, you can see a uh, resetable poly switch fuse there.

not much else, some analog, uh stuff. Probably got some uh amplifiers in there and uh, couple of miscellaneous components, but it looks like, um, the LCD is, uh, got a zebra strip in it and uh, we're going to have to take out that it's going to have the processor underneath the LCD cuz there's nothing else on this board at all. What's an Argent A? no idea. And there's the LCD with the Uh zebra stripes on it.

Nothing much doing there. And if we have a look under the main board here, we can see the Uh lead backlight on the thing. You can see the Uh two LEDs up the top. There There they are and yep, you guessed it.

TI MSP 430 Yet again. and here you go. you can see that uh light pipe backlight there. The light enters along this edge here and then it curves into there.

and of course they've got uh, reflective, uh strips along the outside there which helps contain the light in the middle and then it's uh, emitted. um evenly spread, should be spread fairly evenly. This little bit of rubber up under there. when you put those together, it somehow holds that module in place like puts pressure on it.

I Wonder if the Uh Cnx 3000 did that? I I won't take it apart again I'll have to review my uh photos or video footage and sorry folks, That's All She Wrote on that. Nothing much more interesting to show you I'm afraid. Next, and if you want to see the screen on that, turn it on tells you it's the A3000 and eh, not much doing. Next up the Cnx V 3000 Wireless Ac voltage.

That's all it does folks is uh, measure Ac voltage. cat 3 Cat 4 600 volts a that looks really nice and rugged. I Like it? Um yeah, they've all got these B these magnetic um, hangers on them of course. really super strong and it woohoo latches onto the battery there.

It's curious to note that on the clamp meter, they actually use one of these uh, latching retaining hooks for the battery. uh, compartment. but on this one, eh, oldfashioned screw? go figure. But it is at least metal threaded insert.

So let's uh, how do God how do you pop that open? That's a bit. that's a bit silly. There we go. Two AA batteries and four screws I Think this suck is just going to pop open.

It's almost begging to be opened. Tada And there we go. Ah, looks, here we go. We got of course we got the same module again and yeah, look, we've got a little in that's that.

that's actually rubber. There you go, that's actually a rubber insert. There's the metal plate in there for the Uh for the magnet system to retain against and that's a little rubber molded rubber thing which then holds that module in place. All right.

So we have our Zigg module there. We have another uh uh DC Todc converter with the inductor. There we have as a little poly switch down in there. Under there.

we have exactly the same uh, custom fluke chipset as we saw in the multimeter. Got the programming header interface there. We got the LCD on top once again. I It's almost as if like, you don't have to take it.

not pointless taking the thing uh apart. Actually, you go, you know it's going to be the same. under there, it's going to be an MSP 430 uh processor. and that's all she wrote on the input uh side here.

Check this out. Of course this is, uh, different because they've got a different uh, um, input connector form factor, but this looks really solid. I Like this, you know, big solid molded connection on there for the Uh for those, uh, banana Jacks And really, there's um, you know, and they bolted it directly onto the board there uh with these two screws and they've got one mou resistor there. you'll notice that there's no Ms on this thing at all, which is, uh, quite surprising.

Oh, unless they're on the other side. but I don't see any through hole uh pads for the MS at all. So there you go. All they've got is this m input protection resistor.

Here, they've got an input uh cap and then AC coupling cap and then they've just got uh, the hybrid thick film uh, resistor divider Network and that's um, that's pretty much all she wrote. I mean, but this thing doesn't have to do any uh, range switching or anything I don't think um, well, a couple of lower ranges from the divider, but that's it I mean so really, it's just fixed functionality. but I did uh, expect to see at least some Ms in there. so I don't know, um, fluke know what they're doing on the input protection.

uh side of things. this is uh Cat 4 600v rated so I guess they've determined, uh that due to the limited functionality in this thing, they simply don't need input Mo protection. Now this is a bit fascinating. Check it out.

Here's the positive input: uh Jack here and it just goes through that M resistance on the top in series with the M resistor goes through that VR and then on a center layer around this cut out here which has this uh, rather large uh uh shield on it. Look, they've actually put like a blast shield around there which then goes in the middle of the board so they're almost like that's like a fusible track or something. So on. Gross overload conditions that's designed to uh, uh, break I'm assuming.

Then there's the AC input coupling cap of course, and straight into the divider and you know, really, that's all she wrote. And then they've got an inductor down here on the Uh surface mount inductor on the negative line, but that's rather fascinating. There you go. Um, that's all you need for a um, a fixed AC measurement.

Uh, you know, effectively, like a multimeter input. Uh, that only does um, high voltage AC But once again, folks, as you'd expect, very rough, ruged, very rigid, well-designed case. I Mean even that half of the case if I try and flex it like that. It's very strong, very rugged.

I Really like it. They've done the same uh thing around here with the post look at that. They've embedded them in there so and then this is directly molded into the top side of that there. very strong, very rigid.

That's why when you put these together like this and they go in there and you know and you try and twist these things, you just cannot. You know there's no giving these. They're super strong, super rugged. I Really love the design of this thing and that input jack there fully molded into the bottom of that look at that.

There's huge big threaded metal inserts into that massive I Really like it. Solid. Last you a lifetime. and yeah, I'm not going to bother with the LCD I Did have a quick look on exactly the same MSP 4 430 as before.

So next, let switch that one on on as well. That's the V3000. Look like a U, but that's all they could do there. There you go.

Terribly exciting Volts Ac. It's got a log button, it's got a RF zigby connect button and a backlight. and uh, really, that's all there is to it. It's not that even actually, you can see the hot spots on the LED.

There's so yeah, that uh, that light pipe. It works okay, but jeez, it's not as good as some meters, that's for sure. And I'm telling you I really like these things. They just built so solid and tough you could throw them in the toolbox.

and oh, they're built like the proverbial brick dny love it. And by the way, it doesn't actually say where they're made, but I assume that they're made in uh, the Everett plant in Washington. But yeah, I don't know. they don't actually say made in China So with fluke you got to assume that it's USA but I'd be stamping made in the United States of America Uncle Sam approved.

Next up, the Cnx I 3000 Wireless Iflex that was that funny looking. Flex Uh Current Uh, clamp. Well, it's not a clamp, It's a flexible interface and as you can see, they got like a custom interface. It looks like they got three connections there, but it's actually not.

This one over here is just a dummy one and they actually use both of these. So I'm not sure why they've decided to do that. You can see that this maybe you can't see down there, but that one's just a dummy. Um, the two contacts are actually there and there, so not sure why they decide on that crazy.

Well once again, this will be very quick folks. Not much to write about at all. Um, they've done it. Looks like they've used.

uh, have they used. like the same case down here? They may have with the same cut out there, but the two two connections are over this side now, so they may have used the same mold in there. Interestingly, there's a cap missing there, which, uh, and they've actually, um, put paste on the pads. which, uh, you know you don't normally.

uh, find there's another unpopulated one up there. It's got some paste on there, but yeah, nothing much happening. They've used the Uh two, uh, terminal screw interface here. Looks like there's a looks like there's a polyfuse there and well, not much else.

Is that an amp? We'll have to take a look at that. that ship there looks like an analog Devic is uh Op 1966, but uh, I can't find info on that anywhere. They got the Poly switch there for the battery contacts and there's the 18 Mega SPI flash again and we got our zigby module and a bunch of other analogy type stuff. Um, yeah, not that exciting.

sorry. I'm not going to go into detail. it's like, yeah, whatever. I don't even think I'll take the rest of the board out because well, we know what's on the back of it.

but that is basically the uh, input circuitry pretty much there for that uh clamp system. Well, the um for that flexy sort of current clamp system up to 4,000 amps. Oh excitement. Plus here folks, there it is.

the I3000. Woohoo! Last but not least, we have the Cnx T3000 Wireless K type thermometer. There you go. Standard K type thermocouple input 30 volts Max Not terribly exciting.

Crack it open. Expect to see exactly the same stuff now. this one's a bit more interesting. We've got a bit more uh input circuitry down in here.

Up the top, Exactly the same. You know we've got. it's the same molding, same casing. Everything works same as before for the other modules, but uh, down here, we have a thick film hybrid.

there. There it is. there's the uh, no, there's a Um linear technology part there. We'll take a look at another Qfn package there and down in there looks interesting.

It's all like gunked up, but that's the Uh input connector. Let's take a look and there's an LT 6010 there. Uh Precision Opamp designed for oh surprise surprise. Uh Thermo couples.

you know, low input? uh, bias current. you know, 100 Pico amps or something like that. So pretty. Shmo little part.

and there's that LT Flk2 fluke custom chipset again pops up all over the place. So apart from that, we've got Uh, there's the two input uh pads down in there. You can see they're huge and chunky. Check those out.

Oh enormous. They got two inductors leading from them. you know, totally differential look. You can see the Uh two inductors there.

You can see the Uh cap AC crossbow from two more inductors. So we got input filter in there and that all goes into uh, some Uh Precision resistors there and that's measured by the LT fluke and so I'm not sure what the Uh Precision Op amp all all the way up there is doing. If it's look like it's not like near the input to the U uh, thermac couple down here, but this could be just a switching uh chipset or something like that. could just be switching it through and then it uh goes into the 610 up there.

who knows. Um, not sure. We got a couple of Uh five and six pin so 23s and uh, that's all she wrote. So let's see if we can get that board out.

at least now you can see the Um input jacks down in there. they're actually a spring terminal and those Spring contact inputs of course. Uh, contact these two large studs here which are actually press fitted into the board down and press fitted and solded into the board down here like that and you can see the massive Uh tracers up there. I Don't you know they're not doing it for the Uh current? They're doing it for uh, thermal reasons I can only assume.

And there you go. Rt1: There's a themister in there which measures the temperature directly at those two input contacts. so they're obviously trying to compensate for um, any effects due to the Uh metal. Any thermal effects due to the metal contacts.

right down at the input. They've gone to a lot of trouble to do that. Fantastic, because of course, what is a thermocouple? It's just, uh, a contact with two dissimilar metals and there's the thermocouple probe right there. and uh, really? um, that's effectively a similar thing which is going to happen or could potentially happen on your input.

Jacks here. if you have dissimilar Metals Um, it can generate a voltage and that changes with temperature, so you got to be very careful. So they've added the extra themister in there. So I'm not actually sure what uh, metal they've actually used in here, but they've determined that it's going to have a, uh, enough effect that they have to measure the temperature at that point and potentially, uh, compensate for it.

So wow, that is. That's really quite interesting I Like that. and I was going to say maybe that's with that 610 is doing there. It's actually reading that individual Channel there.

but yeah, I can't really seem to see where it goes. It seems to go into this uh, resistor Network down in here. so that's just a compensation uh, Network or something. Not sure if they actually separately measure that into the analog uh to digital converter and then uh, uh, do something in software with that or whether or not that's just it.

It looks like it just may actually be. you know, um, compensating in an analog uh fashion. But yeah, not entirely sure. Well, this module is, um, you know, rated at like a half a degree.

uh, absolute, uh, accuracy and uh A.1 de resolution Celsius of course and .01% full scale um, temperature coefficient per degree C So you know it's a reasonably highs speec uh, temperature module, that's for sure and we'll switch that one on for fun. T3000 Sounds like Terminator 24.9 de here in the lab there. It is not terribly exciting, So there you have it. that's the fluke.

Cnx 3000 Wireless multimeter series Very very funky. Um yeah, haven't used them yet. so I can't give you a review on these things yet. but uh yeah.

very interesting, very wellb built. uh as you'd expect from Fluke. Absolutely first class and uh, worth every cent I'm sure hope you enjoyed it. If you want to discuss it, jump on over to the EV blog Forum Catch you next time.

Oh damn that hurts. Hi! welcome to tear down Tuesday hey oh I didn't hook up the bloody mic a.