Products > Test Equipment

Siglent SDM3045X - Enough is enough

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pcmihnea:

--- Quote from: n3mmr on January 17, 2022, 04:09:01 pm ---
--- Quote from: Ringmodulator on January 17, 2022, 03:34:45 pm ---
--- Quote from: pcmihnea on January 17, 2022, 08:53:17 am ---
Ah, now that's a clever hack! :)

As I've now have backups of my calibration files, I've succesfully flashed the SDM3055X-E patched FW, and it seems to still be in spec with a calibrated voltage source (0.01% on DC voltage), so it still has (at least) that measurement calibrated - I don't have any other precise references to test...
As noted by previous posters, the device shows as SDM3045X. Also, new features added to the 3045X are not (yet) present on the 3055X-E FW, most notably the custom temperature sensor (and I assume the bugfixes, as well :) ).

--- End quote ---

I am still curious, if the suggested "reverse hack" from tv84 really works. Afaik, he does not have the unit himself:

https://www.eevblog.com/forum/testgear/siglent-sdm3045x-enough-is-enough/msg3938767/#msg3938767

If you would try this, I would be interested in the result.

The device name is defined in NSP_trends_config_info.xml

Chris

--- End quote ---
If you're asking about getting back to being an SDM3045X, yes. It works, as does the hack to make the SDM3045X be an SDM3055X-W.

--- End quote ---

Can confirm as well, using the patched 3045X and 3055X-E firmwares, I can go between them (3045->3055, 3055->3045) without any issues.

mushroom:
I confirm it does work, 3045X to 3055X-E and 3055X-E to 3045X.
Thanks.

BTW, a cal backup before the "updates" didn't hurt. Who knows... https://www.eevblog.com/forum/testgear/siglent-new-bench-dmm-sdm3055/msg3346192/#msg3346192

Now building poor man's Kelvin-ish probes.

jimjam:

--- Quote from: eloso on December 31, 2021, 12:10:45 pm ---For the record, the relay activation when measuring above 2V is so damn annoying. It occurs whether in Manual or Auto.  - its not the noise , its the delay every single time you apply the probe to a point to be measured. 

--- End quote ---

That does sound very annoying. Does this happen with SDM3055?

tautech:

--- Quote from: jimjam on February 02, 2023, 03:49:12 am ---
--- Quote from: eloso on December 31, 2021, 12:10:45 pm ---For the record, the relay activation when measuring above 2V is so damn annoying. It occurs whether in Manual or Auto.  - its not the noise , its the delay every single time you apply the probe to a point to be measured. 

--- End quote ---

That does sound very annoying. Does this happen with SDM3055?

--- End quote ---
No.

Please do your homework and compare datasheets to see the measurement range differences between 45X and 55 models.
Then study the whole thread where it has been proven the Chinese 55X-E is the same HW as western 45X which can be converted to a 55X-E to not have the annoying range issues 45X has.

eloso:
I was the OP on the thread, feeling somewhat aggrieved by the switching behaviour at 2V of the SDM3045 even with a manual range setting. i.e. set it to 20V manual range, and measure a voltage of 1.5V everything is normal and the measurement appears on the screen quickly. Measure 2.5V and there is a pause, a click as a relay flips over and then eventually a reading appears.


Folk seem happy to resolve this by flashing firmware from a different model and they also seem happy with the results.  I was not happy with that solution to the problem and I contacted Siglent through the normal channel some 6 months after purchase when I was particularly unhappy at some results I was getting using logging (another reason why having some kind of automatic range switch when in a manual range is absolutely barmy).    I really shouldn't have left it so long and I was not expecting much of a response.  To their credit, I had an answer very quickly  from a senior figure in Siglent. Flashing different firmware was not a solution but Siglent could not have been more supportive. 

I now have an SDM3055 which I should have purchased in the first place (they aren't much more cash than the 3045) and overall I am pleased with it. 

I have read some criticism of Siglent by folk feeling let down by unresponsive Siglent support.    I can only comment with any authority on my own experiences and for me Siglent support has been nothing but good, and I have been left  feeling pleased to be a Siglent customer both for this meter and for some other kit that I also have. Although not involvd with my particular case I also would commend the enthusiasm of our friend Tautech for his support, not just to his own Siglent customers but to folk all over the world through this forum and privately in the background. Well done !

Eloso

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