Author Topic: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X  (Read 93722 times)

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Offline H.O

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Re: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #350 on: February 15, 2018, 02:31:36 am »
Apparently there never was an actual issue.
Someone said there might be so they took the safe route and degraded the meter while investigating after which it was determined to not be an issue so they changed the rating back. As far as I could understand from the interview Dave did with the Keysight rep they did do any changes to the hardware so they're all rated the same.
 
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Offline Joel_l

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Re: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #351 on: February 15, 2018, 12:50:36 pm »
That's good to hear. That was the impression I got while reading through the thread. Glad things are back to "normal".
 

Offline CustomEngineerer

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Re: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #352 on: March 02, 2018, 05:24:54 pm »
After years of avoiding buying a bench DMM because as a hobbyist I really didn't need one I finally had a moment of weakness last year when the ITT surplus GWInstek GDM-8251A meters dropped to under $100 and bought one. Have enjoyed using it so much over the last year that lately I've been looking at some newer bench meters and finally settled on a Siglent SDM3055. I've had it for a little over a week now, and am really impressed with it. (one of) The obvious benefit over the GDM-8251A is the ease of configuring and setting up measurements since it has a bigger screen with soft buttons and menus (not just initial setup, but easily switching between options on different measurements). Also really liking being able to do the trend graphing directly on the meter, instead of always having to offload to the computer first. The EasyDMM software seems to work very well too for the times where I do want to capture the data on the computer.

I had ordered three of the different cheap ebay AD584 voltage references as well last year around the same time as the GDM-8251A. One of them came with a printed sheet of supposed measurements, that appeared to not have probably been real measurements (saw that several other people that ordered same one received identical printed "measurements"). However the other 2 references had the hand written measurements which at the time did seem to be realistic as measured by each of my other meters. I had documented what each of my meters measured at the time I received them, and rechecked both references again last week a both still measured the same with the GDM-8251A. Measuring with the new SDM3055 (so obviously had recently been factory calibrated) both references measured essentially spot on, with the better (at least more expensive) reference measured exactly what was printed on it, down to the last digit of the meter (though since the reference had been measured with a higher resolution meter by the seller, it showed one more digit than the SDM3055 was capable of). And even leaving the measurement for each range running all day, it stayed within 1 LSD. I realize they are just cheap ebay references, and may not ultimately mean anything, but was just surprised by that result.

I wanted to add my initial experience for anyone else considering one of these, but also wanted to give a big thank you to Tautech. Even though I never spoke directly to him about this purchase, every single question I had about the meter while researching I was able to find someone else had already asked, and every time Tautech had already given a detailed response to the question.
 
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Offline RF_Energy

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Re: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #353 on: March 19, 2018, 10:32:16 am »
Hi, i am looking for a new DMM for the bench, i do like the Siglent SDM3055, old guy's love the big screen, and a nice price :-DD, i did see it on the site here:
http://www.siglent.com/ENs/prodcut-db.aspx?id=176&tid=37&T=-1
that there was a new model, the big bumpers from the X versions are now on it, also I've seen it on a video here:

Are there more changes, maybe in the hardware, or is it only new looks, but in the inside the same (old) hardware.
 

Online tautech

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Re: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #354 on: March 19, 2018, 05:18:13 pm »
Hi, i am looking for a new DMM for the bench, i do like the Siglent SDM3055, old guy's love the big screen, and a nice price :-DD, i did see it on the site here:
http://www.siglent.com/ENs/prodcut-db.aspx?id=176&tid=37&T=-1
that there was a new model, the big bumpers from the X versions are now on it, also I've seen it on a video here:
Are there more changes, maybe in the hardware, or is it only new looks, but in the inside the same (old) hardware.
Welcome to the forum.

For your part of the world Siglent in Hamburg have a more local to you website:
https://www.siglenteu.com/digital-multimeters/

Thanks for sharing the vid....shame the reviewer didn't have another set of Kelvin clips for a better 'apples vs apples' comparison.
I'm not aware of any changes to the HW other than 'X' model bumpers.
Avid Rabid Hobbyist & NZ Siglent Distributor
 
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Offline flash2b

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Re: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #355 on: March 20, 2018, 05:19:03 am »
The SDM3055 without the X but with the X look (like SDM3045X and SDM3065X)
« Last Edit: March 20, 2018, 10:49:32 pm by flash2b »
 

Online tautech

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Re: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #356 on: March 20, 2018, 06:54:19 am »
The SDM3055 without the X but with the X look (like SDM3045X and SDM3065X)
[img]https://www.circuitsonline.net/forum/file/30557[/
Yep. I guess it's confusing one way or the other. To X or not to X.  :-//
Avid Rabid Hobbyist & NZ Siglent Distributor
 

Offline RF_Energy

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Re: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #357 on: March 20, 2018, 10:56:31 am »
Hi, i am looking for a new DMM for the bench, i do like the Siglent SDM3055, old guy's love the big screen, and a nice price :-DD, i did see it on the site here:
http://www.siglent.com/ENs/prodcut-db.aspx?id=176&tid=37&T=-1
that there was a new model, the big bumpers from the X versions are now on it, also I've seen it on a video here:
Are there more changes, maybe in the hardware, or is it only new looks, but in the inside the same (old) hardware.
Welcome to the forum.

For your part of the world Siglent in Hamburg have a more local to you website:
https://www.siglenteu.com/digital-multimeters/

Thanks for sharing the vid....shame the reviewer didn't have another set of Kelvin clips for a better 'apples vs apples' comparison.
I'm not aware of any changes to the HW other than 'X' model bumpers.

Thx,
there they have the old pictures on that site, i did ask the local shop (eleshop) here in the Netherlands, if they have the new model, and they did not now, so they send me a picture of what they have there, and it was the new model, the 3055 (X version).
i am still thinking about the 3045X or do i buy the new 3055, its only 100 euro price difference, and the 3055 has the extra filter for the dc what you can turn on and off, and 1 digit more on the screen, only the accuracy i do not understand, the 3055 is 0,015%, and the 3045X is 0,01%.
wy is the 3045X better, and its just a 4,5 digit meter 60 K counts, and the 3055 is 5,5 digit meter and 240 k counts i belief, wy only 0,015% accuracy.
i like to order next week, help me please to decide which meter is the best for me, i do not have the money to buy twice, i also was thinking about the Rigol DM3058E but the screen is not so nice to see, and it has no lan, i am not blind, but i like to have a easy to read screen, yes, old guy, i need glasses to see the Rigol meter  8).
i realy do not need the accuracy of a 5,5 digit meter, but its nice to have i think for 100 euro more, maybe later you need to have it for a project, but when the meter is less accurate, then you have nothing on that 1 digit more.
sorry my bad english, but i do my best to learn it, and i did not have the time to look things up, and paint it  :-DD
 

Online tautech

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Re: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #358 on: March 20, 2018, 12:26:34 pm »
RF_Energy
All models have had the X bumpers for a while now, any that don't will be very old stock.

You are best to make the decision yourself but I will add I have sold 5:1 in favor of SDM3055.
I also know it will hold its value better and be more sought after.

WRT accuracy, I have not tested one against the other (no suitable reference) but I would have expected the 3055 to be better now than early units and maybe the datasheet just reflects early 3055 model spec ?
Good luck.
Avid Rabid Hobbyist & NZ Siglent Distributor
 
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Offline Performa01

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Re: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #359 on: March 20, 2018, 09:22:24 pm »
We need to distinguish resolution from accuracy. There are many tasks that don’t require absolute accuracy, but high resolution with good short term stability.

Then the specifications of SDM3045 and 3055 are not directly comparable, because the offset error is specified differently. Also the ranges are different and the SDM3055 has only four times the resolution of a SDM3045. For certain voltages the SDM3045 might be actually better suited than the 3055.

It should also be noted that the SDM3045 has 0.02% error for voltages higher than 6V whereas the SDM3055 has a constant error of 0.015% up to 1000V and accuracy is also specified for the temperature range outside the 23°C +/-5°C window. These facts alone hint on a higher class meter.

What really counts in the end is the total error of the measured value – and the available resolution. The comparison looks like this:

                SDM3045                  SDM3055
Voltage     Error     Resolution     Error     Resolution
2V            0,035% 100uV          0,018% 10uV
5V            0,020% 100uV          0,031% 100uV
10V          0,060% 1mV             0,023% 100uV
 
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Offline RF_Energy

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Re: Siglent NEW Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #360 on: March 21, 2018, 08:08:50 am »
yea, oke i see, thx to you all, for the fast and good reply's, i know now i have to buy the siglent sdm-3055, i hope that it wil serve me many years to com.

 


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