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UNI-T UT61E Multimeter teardown photos.

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kcbrown:

--- Quote from: joeqsmith on May 26, 2017, 11:30:33 am ---I would say ANY time someone would modify a handheld meter it would make it worse!  It's just being stupid!  If you are a child or novice, even more so.  Adult's I would expect would know better.  The videos I make showing the shortcomings of the UT61E are for educational purposes only. If the meter were to end up in someone else's hands, it is CLEARLY marked.   

I've stated my views on this many times but seems it's not clear to you.  If it's down to either living with the meter as it is or putting in those components, which is the better choice?  Live with it!  Next time buy a tool that meets your needs!

--- End quote ---

Thanks for restating your views here.  I either hadn't seen your messages where you stated them this way, or didn't remember them (you'll find that my memory is basically the worst on the planet -- it's almost completely worthless).  Sorry for the frustration.

I suppose that even if the person who performs the modifications knows what they're doing (e.g., they design multimeters for a living), they still can't know that they've improved it without actually performing the proper tests.  And they most certainly can't know that the revisions will result in the meter passing the safety standard tests without performing those same tests, which tend to be destructive.  And even then, I wouldn't be surprised if proper testing requires that a batch of meters be tested in that manner to make the test statistically valid.

I guess from a safety standpoint, if you don't know that your changes have improved things, you have to presume that they've made things worse.  That seems sensible.

Oh, and as an aside, for what it's worth, I quite appreciate your irreverence in your videos.  It's quite refreshing.    :-+

schmitt trigger:
If anything, my only concern would be the Rotary selector brushes making intermittent contact with the board tracks.

I know, I know. This technique is used in most, if not all meters with rotary selectors.
All I'm saying......The quality of those bronze "brushes" determine the instrument's usable life.

Spaghetti_142:
No knocking, but I absolutely love my UNI-T. For the price it blows away Fluke. I use it at my electrical lab and I love it. Couldn't get the software to work with the meter, a little outdated, other than that, I'm good Good luck to you!

ProBang2:
 
--- Quote from: Spaghetti_142 on May 28, 2017, 04:54:59 am ---[...] Couldn't get the software to work with the meter [...]
--- End quote ---

Where is the problem? Do you connect with a RS232 or an USB cable? At least regarding the USB connection I can assure you: The (probably) latest SW version 4.01 works fine with Windows7 (64-bit) and even with Windows10 (64-bit).

In case you have only an older SW version: You can download this version here.
(IIRC Install the SW first, then connect the UT61E.)

If you don“t want to use the original Uni-T software: There are at least two alternatives (as freeware) available.

dinoboy:
Here is another headsup, UT61E can now be logged on the Raspberry Pi 3 (Raspbian OS) through a professional-like / commercial-like high maturity software called DEX.

Of course, one must connect the UT61E through its original serial data cable (RS232, female plug) to the raspi "somehow". There are 2 straight-forward commercial solutions: either using a FDTI-chipset based USB2Serial adapter or using a RS232 shield (Pi Hat). At this point i cannot recommend using USB2Serial adapters based on the CH340/341-chipset (or variants like the HL340) because they are not straightforwardly supported by the latest Raspbian builds. One can get CH340-based items to work on raspi but it is a frustrating hassle afaik. In contrast, FDTI is supported directly by Raspbian, so you're good to go, no need to install Linux ARM drivers from a CD or floppy disk  :-DD

Apparently the cost for a nice quality FDTI usb2serial adapter is similar to the price of a Pi Hat RS232 shield, around 10EUR shipped. Of course a usb2serial adapter is more flexible, you could use it on any computer, PC, Mac, Linux computer. Your choice.

So for people who need to do tens of hours of logging, for example overnight, they can use the headless raspi from now on. DEX saves the logged/graphed data in various formats including *.CSV. UT61E support is new in the latest version of DEX, here a screenshot of the device selection dialog:



While DEX support of UT61E is brand new (since v3.3.0), DEX support of the raspi operating system is new in itself (since v3.2.9)! Kudos to the maker of the great software  :clap:

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