Transient Testing the KAIWEETS KM401 4000 count DMM

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4 ай бұрын

Testing the KAIWEETS KM401 DMM
UNI-T UT181A Part 2 Comparing the grill starters waveform against the IEC standards.
• The UNI-T UT181A Datal...
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The data for the meters I have tested may be found here: docs.google.com/spreadsheets/...
Answers to Frequently Asked Questions may be found here: docs.google.com/document/d/1g...

Пікірлер: 22

@VoeViking 4 ай бұрын

Not to bad for a cheap meter. After watching your videos I bought the brymen 869S and I love it. Thank you for this in-depth reviews. Cheers.

@joesmith-je3tq 4 ай бұрын

If I had to buy a new meter, the BM869s is still by far my favorite.

@mohsenSL 3 ай бұрын

@@joesmith-je3tqor sanwa pc7000 the best ver of brymen 869 👌🏻

@grahamhall2662 3 ай бұрын

I have had the previous model KAIWEETS HT118A for two years now. A s a novice , hobbyist I love this unit and is my go to meter even though I have more expensive ones. Like the most that the display is really clear. Great review Joe, heart leaps in my mouth at those high voltages. 😄

@qzorn4440 4 ай бұрын

Wow. So many neat test equipment products. Thanks.

@chongli297 4 ай бұрын

Pretty amazing. This meter costs less than a set of replacement ceramic fuses for a Fluke! I wonder how good these fuses are.

@gamiwv 4 ай бұрын

Joe will you provide a link for the "tweezers soldering iron" you are using in this video ? I'm seeking for something like this

@joesmith-je3tq 4 ай бұрын

Pace MT-100 Mini-Tweez. The base and tips are sold separately. paceworldwide.com/mt-100-minitweez-surface-mount-rework-tweezer-handpiece-intelliheat

@gamiwv 4 ай бұрын

@@joesmith-je3tq thanks but to expensive for me

@wktodd 4 ай бұрын

Have you considered automating these tests (or at least the function tests)?

@joesmith-je3tq 4 ай бұрын

No. I wonder how much effort that would take. Maybe a couple of cameras with some recognition software to determine the various modes. Some sort of stepper to drive the knob and solenoids to press the buttons. If you make such a fixture, post about it.

@andersvandegevel8355 4 ай бұрын

One (unfortunately destructive) test I'd like to see, is if there's sand in those "HRC" fuses. It's quite common for it to be omitted in the cheaper stuff

@joesmith-je3tq 4 ай бұрын

I've had several apart during these videos and so far, all were sand filled. Now would I trust any of these meters where this would even be a concern? Not a chance!

@colinreid7305 4 ай бұрын

Another well presented and informative video. Most trades people will have more than two multimeters and perhaps a cheap meter as per your test, for electrical tests under 50v ac/dc. Perhaps low-cost meters have a place, and qualified tradespeople will know not to trust cat ratings on such meters. I was in the market for a decent replacement meter and having been bitten by Uni-t in the past I purchased a Brymen BM829S, I will see how that performs, At least it has a cat rating that may mean something.

@absurdengineering 4 ай бұрын

Not a bad result. Still fails to be up to the spec it claims, but not too shabby. The fast clamp failed shorted and protected the chip. How dependable this may be who knows, but so far so good.

@joesmith-je3tq 4 ай бұрын

Typically with the 5mm PTCs, their case fails and they arc. Then there is nothing to limit the current to the camp except the 2 ohms source and what ever else is in the circuit (leads, switch, traces, connectors..). Once they arc, the transistors typically open up taking out the next device in the chain (controller). No doubt had I continued to increase the test level, this would have happened.

@LawpickingLocksmith 4 ай бұрын

Are you telling dodgy Dave that his Brymen in his EEVShop is now beaten by a Kayweet?

@joesmith-je3tq 4 ай бұрын

LOL, was that your take away?

@LawpickingLocksmith 4 ай бұрын

@@joesmith-je3tq I was thinking of blowing up some of my excess meters that I have lost count of. Looking how much Jerryrigseverything makes on scratching, burning and bending phones I think the whole world has gone mad. I was once a lab technician for Schaffner where we built transient generators for testing automotive components. The company got spun off and is now called Teseq.

@LawpickingLocksmith 4 ай бұрын

@@stiaankruger2699 Now he has become a bird watcher when he reviews a safe made in Germany.