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New Uni-T UT61 series (UT61e+)

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Fungus:

--- Quote from: WilldV on February 18, 2021, 10:53:23 pm ---Mostly arduino stuff, electric Motors and repairing items. (Electric motors around 4kw) 
I like the idea of data logging and I was looking at the BM235 but I dont know.
How unsafe would the UNI-T UT161E be?

--- End quote ---

That depends on what you mean by "safety". There's two aspects to that, "user safety" and "meter robustness" how likely the meter is to die.

User safety depends on user procedure as much as anything else. If you connect the meter up to the AC power in amps mode then a good meter will minimize the user excitement. The real trick is to not do that in the first place (or own a meter that doesn't even have an amps mode for those measurements).

Meter robustness means how likely you are to have to go and buy another meter afterwards. Anything with big motors can easily damage a multimeter. Uni-T don't have a great record in this department. See the spreadsheet in the first post on this page:

https://www.eevblog.com/forum/testgear/hear-kitty-kitty-kitty-nope-not-that-kind-of-cat/


--- Quote from: linuxlou on February 18, 2021, 11:55:49 pm ---I found the DC accuracy to be excellent, comparable with a SDM3055 !!

--- End quote ---

That's nice but even a meter with 0.5% accuracy (ie. 2000 counts) is more accurate than most of the USB power supplies, resistors, etc. found around an Arduino workbench (which are normally 5-10% accuracy).

rf-loop:

--- Quote from: Fungus on February 19, 2021, 07:46:12 am ---

--- Quote from: linuxlou on February 18, 2021, 11:55:49 pm ---I found the DC accuracy to be excellent, comparable with a SDM3055 !!

--- End quote ---

That's nice but even a meter with 0.5% accuracy (ie. 2000 counts) is more accurate than most of the USB power supplies, resistors, etc. found around an Arduino workbench (which are normally 5-10% accuracy).

--- End quote ---
:-DD |O

@linuxlou  have used what he said and its accuracy and resolution is far over UNI-T 61E+

Btw. What random generator you use for generate these comments.

and then this accuracy vs count... omg.

Fungus:

--- Quote from: rf-loop on February 19, 2021, 10:18:56 am ---and then this accuracy vs count... omg.

--- End quote ---

Oh, you thought it was a calculation?

The actual logic was: 2000 counts is the lowest counts I've seen on a meter and it's enough for 0.5%.

I couldn't be bothered to figure out the exact number of counts that would give at least 0.5% accuracy on all possible inputs.


rf-loop:

--- Quote from: Fungus on February 19, 2021, 10:48:51 am ---
--- Quote from: rf-loop on February 19, 2021, 10:18:56 am ---and then this accuracy vs count... omg.

--- End quote ---

Oh, you thought it was a calculation?

The actual logic was: 2000 counts is the lowest counts I've seen on a meter and it's enough for 0.5%.

I couldn't be bothered to figure out the exact number of counts that would give at least 0.5% accuracy on all possible inputs.

--- End quote ---



Btw, uni-t 61e+ is claimed Accuracy: ±(0.05%+5) (a% of reading + b digits)
SDM3055 is  1 year 0.015 + 0.004  tempco 0.0020 + 0.0005  Accuracy±(% of Reading + % of Range)


 

joeqsmith:
Starting on 11-21-2016, I have been running a long drift term test on a UT61E.   This meter is anything but stock.  The meter has not been modified since I started collecting data. 

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