A look at the Uni-T UT210E

[Filippo52]

I'd like to remind the version of my UT210E.

It uses the DM1106 chip, the EPROM is 24C08, and I want to point out that there is written information, albeit with a repetitive pattern beyond the FFh position. See photo attacched



From the next line, they're all FF until the end.

It also has the Hz measurement located in the selector switch, along with the voltmeter functions with AC and DC cables.
I haven't been able to identify where this function is located. The strange thing is that by inserting two other possible scales into the selector switch at the voltmeter positions, thus saturating the four total possibilities, the Hz are still present and appear "cyclically" every two presses of the select button.

Thanks to the new cable, I've implemented new functions in my UT210E, which I'll document as mentioned in my previous post. I'll try something else as soon as I have time. See excel screen shot



as usual for each position there is 2 cell; the UPPER with the original value , the LOWER with changed value used to obtain new features.

[cybermaus]

I haven't been able to identify where this function is located.

By my findings it was value 0A in AF
See here

[Filippo52]

Dear cybermao
Thank you for your comment. I missed it while reading the long thread, and there's some very useful and well-crafted stuff.
I redid many of the things I've already seen because my UT210 is different from the others in the features I mentioned, so I thought I'd do something useful for those who own this new model.



Let's start with the Hz function.
I have no way of checking the "1F" value in the AEh position in the row dedicated to voltmeter functions with test leads.
My UT210E already has the function, and the AEh box is empty filled with "00."
I used AEh  in my modifications, along with the BEh position, to set the AC and DC volt readings in volt and millivolt readings.

Did you really try this "1F" value on an UT210E that before didn't have the Hz function, and did the function appear?
Your response to this question is important. Thank you.

[cybermaus]

Did you really try this "1F" value on an UT210E that before didn't have the Hz function, and did the function appear?
Your response to this question is important. Thank you.

Hmm, checking deeper, I am indeed not sure.

What I am pretty sure of is that the 1F works as Hz on the 211B, and I assumed all functions were the same. And I think I *planned* to retro-actively implement it on my 210E, but never actually did. And now, because you make me double-check I see that on the automated firmware calculator it is giving 12, not 1F for Hz.

So you were correct to interrogate me further. Please let us all know your further findings, and I will add a correction to my earlier post.

[Filippo52]

Sorry to insist, cybermao, but I can't test any values ​​to see the "Hz" function because it's already included as a default setting, and the position is empty.
Could you do it for all of us if you still have your UT210E, which didn't have the Hz setting by default?
Thanks

[cybermaus]

Ok, I do not have easy access to the 211B, nor to any of the newer 210E's I did for others. But I do still have my own 210E from circa 2015.
I'll see if I can give it a try this weekend, also grab a photo of the circuit board's hardware version.

[Filippo52]

Excellent
The 2015 one is fine. If it works on that model, it will work on all of them. If there are intermediate steps, we'll see. After the holidays, I might have access to a UT210E recently sold on Aliexpress, but without the Hz function.
Unfortunately, I've only found negative news online, saying that the function is implemented with the firmware of the main chip. Fixing that isn't easy; you have to download it from the chip, make the modification, and reload it. It's beyond my current capabilities.

[Filippo52]

Dear cybermao
By mistake, I received a UT210C, so I wanted to broaden my view of these clamps since you had already mentioned the UT211B.
If any admins don't like it, I'm happy to start a new thread.

First, I'll post the original EPROM version.



Then I'll get to the topic we're exploring with you (cybermao): the Hz reading function.

The UT210C comes standard with the Hz reading function, and coincidentally, it's also on this clamp in the position of the selector for reading volts with the probes. In this case, I can confirm that it's implemented by placing the value "1F" in cell "9E".
I tried removing it, but the function disappears and is no longer accessible.
Having 4 positions, I added the value "06" in cell "AE" to the 4th position, and now you can select the AC mV reading, gaining 1 digit.
I remember that the UT210E has the Hz function without this "1F" value, so you can use all four positions of the selector to get AC&DC V and AC&DC mV.
Now all that's needed is for someone with a UT210E without the Hz function to try setting this "1F" value in the first free position between "9E" and "AE"; but I'm afraid it won't work, even though it's a must-try.

So far, I've made two modifications to the UT210C based on existing information. These are obviously easy, since the positions in the EPROM are the same and the cell contents also have the same effects.
Unfortunately, there's almost nothing to find on the UT210C, so let's try to build on what Cybermao has made available for the UT211B.

I'm attaching my Excel spreadsheet with the before-and-after values.



A note: to avoid unnecessary tests for anyone interested, I tried entering the values ​​from the UT210E (column 0C) for the NCV function, but it doesn't work; nothing happens, it seems to be nowhere.
In the UT211B, the column is "0E," but here it's used for the Volts and Hz readings.
So for NCV, you'll have to try elsewhere.

[cybermaus]

I remember that the UT210E has the Hz function without this "1F" value, so you can use all four positions of the selector to get AC&DC V and AC&DC mV.
Now all that's needed is for someone with a UT210E without the Hz function to try setting this "1F" value

Just for clarity for others reading this: Your brand new UT210E has the Hz natively. My rather old UT210E does not.
And I incorrectly assumed the 1F value based on a circa 2024 model UT211B

But alas, I can now confirm that on a circa 2015 "UT210E Rev 1" (no decimals shown on PCB) hardware, neither 1F for Hz nor 12 for Duty Cycle work. They just show empty LCD screens
NVC function 1E does work, but that is as expected as it was an official function from the start

[cybermaus]

I can't get the CH341 Programmer software to recognize that the hardware is attached.  Every time I run the software (v1.29 and v1.34), I get an error saying the drivers are not installed.  I can click past that and operate the software, but it doesn't do anything.

Not sure how useful it is for you, but as I was prompted by Filippo52 to work on this again myself, I noticed for me to, whenever I start the programmer it tells me the drivers are not installed.... and next proceeds to work correctly. I read, and it clearly reads correct. I write, and after readback it clearly also writes correctly.

So maybe the first time, with the SER drivers, it really did not work for you, and then by the time you tried the PAR drivers, you got stuck on the message and did not try if it worked?
Or maybe it really does not work for you, I dunno, just thinking out loud here.