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Finally! Hantek HDM3065 6.5 Digit DMM
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Otso:
Thanks for your comments!


--- Quote from: Kleinstein on October 13, 2022, 07:57:08 pm ---Storing the samples in reverse order is strange and more like a bug.

--- End quote ---

I'll verify that this is actually the case. I may be wrong as I only did a quick test.
Edit: Now I'm positive they are in reversed order. I manually triggered measuring four resistors: 100Ω, 47Ω, 100kΩ, 100kΩ, in that order, and the order is reversed in the file.


--- Quote from: Kleinstein on October 13, 2022, 07:57:08 pm ---A reduced resolution in the file / list is also odd. It is common to have more resultion in the file / PC interface than on the display, but not the opposite.

--- End quote ---

The file has increased resolution. The reduced resolution is in the Probe Hold where 8 readings are displayed as a list on the display.


--- Quote from: Kleinstein on October 13, 2022, 07:57:08 pm ---Not having a time stamp in the file is a bit a thing of the past, from times when memory was expensive. It can still get shorter files and often the fixed data rate is good enough, or that data a logged directly to a PC. A time stamp would still be nice, sepcially if auto ranging is active and thus possibly not a constant data rate.

--- End quote ---

Ok good to know. Maybe they'll add it in a firmware update.

Yes, I'll just log to the computer, but sometimes it is convenient not to have to connect it to a computer or start the computer.


--- Quote from: Kleinstein on October 13, 2022, 07:57:08 pm ---For the resistor matching one could use a save to file as a work around, or have an extra dummy resistor for in between.

--- End quote ---
Yes, that could be a good workaround, but then I will only have 4 real readings on the display. Saving to file will work, and may be better anyway as I can get more than 8 readings and with more precision. The automatic hands off triggering of Probe Hold would be nice though, if it worked. If I had implemented it I would reset the trigger whenever it goes to infinite resistance in between the readings. I'm thinking of attaching a foot switch to the external trigger to get hands of triggering.


--- Quote from: Kleinstein on October 13, 2022, 07:57:08 pm ---A not so polished user interface is not so uncommon with cheap meters. It may take some time using the meter to really learn the features - at least those you need. After finding out most of the functions by try an error, it may still make sense to have a read through the manual.

--- End quote ---

Right, yes, I did not expect wonders of one of the cheapest desktop DMMs I could find with "advanced" features. I read the manual even before I purchased it, and again after getting it :-)


--- Quote from: Kleinstein on October 13, 2022, 07:57:08 pm ---The real time clock may indeed only be good for the file date - still quite useful to have valid date and not just fictive one.

--- End quote ---

Yes, I just noticed when I tried to add the screenshot in my previous post that it adds the timestamp to the screenshot as well (not only the file timestamp, but in the actual picture).
BillyO:

--- Quote from: Otso on October 13, 2022, 07:23:21 pm --- ...
Some annoying things though:
...
--- End quote ---
It wouldn't be a Hantek otherwise  :-DD
Otso:

--- Quote from: Otso on October 13, 2022, 07:23:21 pm ---- The Probe Hold feature would have been useful, but it does not work for my uses in practice.

--- End quote ---

I just tested measuring voltages with Probe Hold, and it works exceptionally well. The problem I mentioned seems to be when measuring resistance. I haven't tried anything else than voltage and resistance so far.


--- Quote ---- Clearing the list of samples to be saved is in a completely different menu than where the samples are saved. There is a direct "Acquire" button that goes to saving samples (Save Readings), but if you want to clear the list you have to press Shift, Math, Statistics, Clear Readings (four button presses).

--- End quote ---

There's actually a shorter way than four button presses. When you enable the statistics display, then there is a Clear Readings option in the main screen of what your measuring. So for example, if you are measuring DC, then just press DC -> Clear Readings (two presses), and then back to Acquire -> Save. This is a lot better than the four button menu diving. Clear Readings is normally only shown when you have statistics shown on the screen as well, but there's something I think is a bug (in a good way this time) that makes it shown even without statistics. I discovered this by mistake. You have to press the menu buttons in a very specific way. (Can't bother to write how now).  I can't see why they should ever disable the Clear Readings option in the main screen, since the menu slot is empty otherwise.
 
The HSM3055 is getting better now that I'm familiar with it's quirks. Hopefully the UI/usability gets better with a future firmware update. I wonder if they accept and process user feedback.
rsjsouza:

--- Quote from: Otso on October 16, 2022, 05:39:00 pm ---
There's actually a shorter way than four button presses. When you enable the statistics display, then there is a Clear Readings option in the main screen of what your measuring. So for example, if you are measuring DC, then just press DC -> Clear Readings (two presses), and then back to Acquire -> Save. This is a lot better than the four button menu diving. Clear Readings is normally only shown when you have statistics shown on the screen as well, but there's something I think is a bug (in a good way this time) that makes it shown even without statistics. I discovered this by mistake. You have to press the menu buttons in a very specific way. (Can't bother to write how now).  I can't see why they should ever disable the Clear Readings option in the main screen, since the menu slot is empty otherwise.

--- End quote ---
This sentence reminded me of the following xkcd cartoon: Wisdom of the ancients



https://xkcd.com/979/
Otso:

--- Quote from: rsjsouza on October 16, 2022, 10:20:33 pm ---This sentence reminded me of the following xkcd cartoon: Wisdom of the ancients

--- End quote ---

 ;D Ok, here it comes.

Short version:

* Select either the Trend Chart or Histogram display.
* Press Shift -> Maths -> Statistics -> Hide
That's it! After this Clear Readings is shown on all display types (Number,  Bar Meter, Trend Chart and Histogram) without statistics enabled.

Long story:

The HSM30x5 has four main display types: Number,  Bar Meter, Trend Chart and Histogram. Number and Bar Meter do not normally show Clear Readings unless statistics are displayed. Bar Meter and Trend Chart always display Clear Readings, which is natural since that will also clear the trend chart and histogram. If you have the Number display and go to statistics and disable the statistics info, then also Clear Readings will disappear from the Number display. However if you first go to Chart/Histogram and then disable the statistics the Clear Readings will stay on Number/Bar Meter.

The software developer probably intentionally removed Clear Readings from Number/Bar Meter when no statistics are displayed, because he/she thought that it is useless since it then won't have any effect on the currently displayed screen. This is correct, but it is still useful for clearing the buffer that will be saved to your file. I assume that it is a bug that it stays if you go via the Trend Chart/Histogram. Hopefully they won't fix this. ;-) The optimal solution, IMO, would be to always leave Clear Readings visible on all four display types.
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