EEVblog #894 - Keysight U1461A Insulation Resistance Multimeter Teardown

Inside the Keysight U1461A Insulation Resistance Multimeter

HY3131 datasheet:

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[Elixz]

Every time he says street price I always imagine some guy with a black trench coat standing in a dark ally saying: Psss hey there little guy, wanna buy some electronic test gear?

[Psychlist]

The blue on that common jack looks like machining marking/layout fluid. No idea why it would be needed here.

Also, you keep forgetting to put the overlay links in the video when you say "click here". This time, it was for a Fundamentals Friday video on voltage multiplier. I forget what it was in another recent vide.

[TheJennetteFan]

0:10 the latches have Agilent logo on them.

Have you actually tested the power consumption of the two different displays?

[Petertronic]

I wanted to see if you could get an arc from that 1000V

[ChipGuy]

3:42: The curving of the EEVBlog meter fits the Keysight meter perfectly. Looks like they are snuggling ;)

[electronicsNmore]

Nice piece of test equipment. Great teardown!

[jfaria]

I think Keysight include lithium primary batteries on their multimeters with OLED displays as they are designed to operate in extended temperature ranges and those energizer lithium batteries are rated at -40° to 60°C, while regular alkaline primary cells are rated at -18 to 55°C. My agilent U1273AX (OLED version) also came with lithium primary cells. The battery life with the OLED display is not that bad (I'm using Ni-MH rechargeable batteries). The display is readable but clearly worse than the LCD version in the sunlight, but indoors the contrast is just amazing.

[marcelomedeiros]

Dave is fast approaching the 1000th video!! Way to go man, keep up the good job. I just wonder if he is preparing a mega surprise for us, finishing that power supply project maybe?

[greganagnostopoulos]

The blue machinist dye was most likely used to mark the bending positions of the jack bases. They were probably cut and bent from the same strip.

[cdsmith]

Was that an Hp28S calculator on the bench at 21:10? I had one back in university days. Well, I still have it somewhere but it is no longer in working order, due to an incident with some Mountain Dew entering the keyboard. Replaced it with a 48GX, which I still have and still works great.

[AraCarrano]

Cut @ 20:18, Unit looks to have entered power-save and dimmed the screen. Or was it a lighting/exposure change?

[CliveChamberlain]

Love that soldering by the HV transfo, but what happened to C130 and C131? For a new product, I guess they didn't need the extra multiplier stage. Wah wah wah... Anyway, on the absence of a 10amp internal shunt, with all those adapters why couldn't they have rigged something external for current?

[DoRC]

I like how the label on the case says keysight but the latches say agilent. a collector item:)

[hardrocklobsterroll]

the soldering on the right spring for the shielding looks pretty crusty. I know its nitpicky but I couldn't stop looking at it

[krisztianszirtes]

1:50 Well, more components that are pretty delicate and they could trash the one-piece PCB more often, weight, size of the case and mostly of all these, battery life. A bluetooth module really likes to chew batteries.
5:53 We are talking about ~1000V DC so maybe- MAYBE to stop arcing and corona effects. I'm mostly thinking of the latter.

[eek]

I don't need to click here but all your links are missing. Nice review btw

[BrekMartin]

Can the Energiser lithium ever leak if left in devices? It doesn't feel like a lot of mass inside them.

[nickheywood]

hmm the purple colour on the common jack almost looks like layout fluid/engineers blue/Dykem, same colour anyway (on the video) its used for marking out lines on metal for cutting etc, odd place to put it though....

[OneBiOzZ]

It really should hold when you hit the button on the other ranges!