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UNI-T UT61E Multimeter teardown photos.

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Rick Law:

--- Quote from: mariush on February 21, 2013, 01:33:09 am ---I don't understand why you don't just get one of the serial to usb adapters I linked to, or something similar. If for some reason it doesn't work with your computer, it's just 3-4$ wasted and you can get another model.

It shows up as a regular com port, the data the meter sends is well documented in the chip datasheet ... it's nothing special about it, just playing with the bits in a fixed set of character the meter sends twice a second.

--- End quote ---

re: why you don't just get one of the serial to usb adapters...
I actually did - it just arrived DOA.  Plus my other two existing ones I have that didn't work.  That is zip for 3.  I would be foolish to order a forth and just hope.  Thus I looked into the UT's USB cable.

- - -

re: It shows up as a regular com port, the data the meter sends is well documented in the chip datasheet ... it's nothing special about it...
Exactly.  The UT61E-RS232 works on my desk top, I can see the bytes coming in with just a few lines of code.  I just can't move my desktop around easily; but my laptops have no RS232.  Since I am not particular about plotting it, thus the thought:, argh, I will just write some C or even Basic, and run it off my old (DOS-era) laptop with real RS232, dump the data into a file, now I can convert the data to whatever form I want to plot.

- - -

Those back-and-forth just kicked up some nice memory - Remembering I have two Hp200Lx is kind of nice.   That little tiny DOS machine (with real RS232) is smaller than the UT61E itself and run on two rechargeable AA cells.  I can actually have some good data collection/plotting capability that I can move around easier than I can move my laptop.  That would be a fun little project to do.

T4P:
UltraDMMs creator has spoken up about it before on the thread, it's recognized as a HID device not a COM device

Rick Law:

--- Quote from: T4P on February 21, 2013, 12:10:08 pm ---UltraDMMs creator has spoken up about it before on the thread, it's recognized as a HID device not a COM device

--- End quote ---

Arrgh...

I spend so much time reading to learn about the UT61E as I was waiting for mine... I forgot what I did read...

Sorry for the repeat.

gatos:

--- Quote from: mariush on February 18, 2013, 10:09:22 pm ---See if you experience the same problem with UltraDMM : http://www.ultradmm.com/

--- End quote ---
Dear maruish, I am back!
I installed .NET in my laptop (I had to find on offline installer), and I installed UltraDMM as well.
I have to say that it is really a powerful software with many capabilities and a very nice GUI. But my oldie laptop (Celeron 333MHz) was placing a lot of effort to cope with it (always above 90% CPU usage).
Anyway I tried some measurements, they were fine apart from the frequency measurement: the meter shoes 50.0 Hz and the software displays 500 mHz.

Thank you very much for your proposal (very nice software indeed)!

PS still waiting answer from Uni-Trend.

dr_p:

--- Quote from: gatos on February 22, 2013, 03:57:57 pm ---I installed .NET in my laptop (I had to find on offline installer), and I installed UltraDMM as well.
I have to say that it is really a powerful software with many capabilities and a very nice GUI. But my oldie laptop (Celeron 333MHz) was placing a lot of effort to cope with it (always above 90% CPU usage).
Anyway I tried some measurements, they were fine apart from the frequency measurement: the meter shoes 50.0 Hz and the software displays 500 mHz.

Thank you very much for your proposal (very nice software indeed)!

PS still waiting answer from Uni-Trend.

--- End quote ---

UltraDMM seems to require a 2GHz CPU, so your problem is not necessarily from the meter, but maybe from the software.

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