Author Topic: Yet Another DMM Indecision Post  (Read 4446 times)

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Offline KungFuJoshTopic starter

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Re: Yet Another DMM Indecision Post
« Reply #25 on: May 10, 2023, 06:05:04 pm »
That would be Smart, as you'll need all the digits & signals you can get in those Radiation Hardened Thermionic Emission Field Effect Encapsulated Devices to find those Leaking Electrons that were Thermionic Emitted from the Bright source and got lost on their way to be Collected at the Dark side :)

You're right, they are all overkill. But that never stopped TEAS before.  :-DD
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Online tautech

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Re: Yet Another DMM Indecision Post
« Reply #26 on: May 10, 2023, 08:37:58 pm »
I think I'm just going to sell or trade my SDG2042X towards the SDM3055. I think my Amprobe covers my needs well enough compared to the other handhelds. With the minimal price difference between the nicer handhelds and the SDM3055, I don't see a reason not to get it. (besides it being overkill, not really needing it, etc.) Or maybe I'll be dumb and make room for both on my bench. 🤣


Also, just to throw this out there... Is there a $500 competitor to the SDM3055 that anybody thinks is as good or superior? I'm really not interested in a used meter, so let's not go there. Used meters are projects, I have plenty of projects.
Maybe knowing these products a little better than you....here's what I would do:
Keep SDG2042X for 2 reasons, one day you will need both the output drive capability and the 2nd channel.
Your scope FG output cannot compare with a standalone AWG.

Consider SDM3045X as it's fanless.
Also highly recommend you have a study here:
https://www.eevblog.com/forum/testgear/siglent-sdm3045x-enough-is-enough/
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Offline KungFuJoshTopic starter

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Re: Yet Another DMM Indecision Post
« Reply #27 on: May 10, 2023, 09:40:39 pm »
Consider SDM3045X as it's fanless.
Also highly recommend you have a study here:
https://www.eevblog.com/forum/testgear/siglent-sdm3045x-enough-is-enough/

Is the fan noise that bad on the 3055 that it's a benefit to the 3045?

That thread is interesting, and hacking is fun, but is there a reason besides price and fan noise why you would opt for the 3045X instead?
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Offline BillyO

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Re: Yet Another DMM Indecision Post
« Reply #28 on: May 10, 2023, 09:58:09 pm »
Is the fan noise that bad on the 3055 that it's a benefit to the 3045?

Of the 6 Siglent machines I have the SDM3055 is the quietest save for the SPD3033X and SDL1030X before their fans come on.  After they do come on, it's the quietest.

I'm not sure why folks are so concerned about noise.  When I'm in my "lab" I usually 4 computers and at least 5 instruments turned on.  The addition of one more does not seem to make any difference.  And even with all those things going it's not what I'd call noisy and normal conversations are not in jeopardy. :-//
Bill  (Currently a Siglent fanboy)
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Online tautech

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Re: Yet Another DMM Indecision Post
« Reply #29 on: May 10, 2023, 10:03:24 pm »
Consider SDM3045X as it's fanless.
Also highly recommend you have a study here:
https://www.eevblog.com/forum/testgear/siglent-sdm3045x-enough-is-enough/

Is the fan noise that bad on the 3055 that it's a benefit to the 3045?

That thread is interesting, and hacking is fun, but is there a reason besides price and fan noise why you would opt for the 3045X instead?
SDM3055 = SDG2042X fan noise, not bad but you know, the less the better.
Read that thread again, SDM3045X = China version SDM3055X-E = 5.5 digits for the 4.5 digit cost....and no fan !
The only difference is product type, set by code and firmware.

Here we sell 3045X to repair shops where instead of HH DMM's each repair bench sports a bench meter too.
Either model has been very reliable and when you get the customer come back for further units it says something about their satisfaction with them.
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Offline KungFuJoshTopic starter

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Re: Yet Another DMM Indecision Post
« Reply #30 on: May 10, 2023, 10:21:38 pm »
SDM3055 = SDG2042X fan noise, not bad but you know, the less the better.
Read that thread again, SDM3045X = China version SDM3055X-E = 5.5 digits for the 4.5 digit cost....and no fan !
The only difference is product type, set by code and firmware.

Here we sell 3045X to repair shops where instead of HH DMM's each repair bench sports a bench meter too.
Either model has been very reliable and when you get the customer come back for further units it says something about their satisfaction with them.

I suppose I could put that extra $100 towards another HH DMM if I get bored. 🤣

What program am I supposed to use to edit the ADS file? Does every new firmware version need the ADS file edited, or does that only need to be done if switching between versions?

Thanks
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Online tautech

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Re: Yet Another DMM Indecision Post
« Reply #31 on: May 10, 2023, 10:42:37 pm »
What program am I supposed to use to edit the ADS file?
Not sure but I guess any decent file editor can do it. The OS is Linux so the ADS file format is one of theirs.
Ask Mr Google.

Quote
Does every new firmware version need the ADS file edited, or does that only need to be done if switching between versions?
No just once to change the SDM3055X-E firmware product type for SDM3045X to accept it and thereafter use only SDM3055X-E firmware.
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Offline KungFuJoshTopic starter

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Re: Yet Another DMM Indecision Post
« Reply #32 on: May 10, 2023, 11:12:22 pm »
What program am I supposed to use to edit the ADS file?
Not sure but I guess any decent file editor can do it. The OS is Linux so the ADS file format is one of theirs.
Ask Mr Google.
Mr Google said any text editor, but it failed to mention you need to use a binary file or hex plugin. I can open it now, but the line starting with "b8 8e b4 c9 9f..." is only in the original version tv84 helped with. Seems like I have to start with that same version and then flash the newest one?

Quote
Quote
Does every new firmware version need the ADS file edited, or does that only need to be done if switching between versions?
No just once to change the SDM3055X-E firmware product type for SDM3045X to accept it and thereafter use only SDM3055X-E firmware.
That's pretty cool.

Thanks,
Josh
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Online tautech

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Re: Yet Another DMM Indecision Post
« Reply #33 on: May 10, 2023, 11:22:40 pm »
No I believe the great tv84's product type code can be inserted into any SDM3055X-E firmware for SDM3045X to see it as the correct product type firmware and install it.

We have tools to fix stuff should be required.  ;)
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Offline KungFuJoshTopic starter

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Re: Yet Another DMM Indecision Post
« Reply #34 on: May 10, 2023, 11:27:14 pm »
No I believe the great tv84's product type code can be inserted into any SDM3055X-E firmware for SDM3045X to see it as the correct product type firmware and install it.

We have tools to fix stuff should be required.  ;)

Well, I ask because that first line of code from the original is different in the newest version. It was the 1st line in the old version, should I assume the 1st line would need to be edited again?

It's possible I already ordered it...now I need to clean my workbench and make some room. 😬
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Re: Yet Another DMM Indecision Post
« Reply #35 on: May 10, 2023, 11:30:26 pm »
You might be perfectly content with an unaltered 3045X and if you later decide to improve it and have issues take it to that thread and seek any required guidance from the great tv84 himself.  ;)
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Offline KungFuJoshTopic starter

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Re: Yet Another DMM Indecision Post
« Reply #36 on: May 11, 2023, 12:19:07 am »
You might be perfectly content with an unaltered 3045X and if you later decide to improve it and have issues take it to that thread and seek any required guidance from the great tv84 himself.  ;)

I would hypothetically want to do such experiments during any hypothetical return period...and knowing that I get to mess with it without ruining the cal is what sold me on it. 😉

Also, I'm well aware of how awesome the great tv84 is. 😎
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Offline KungFuJoshTopic starter

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Re: Yet Another DMM Indecision Post
« Reply #37 on: May 13, 2023, 01:43:00 am »
I got the DMM in. It's pretty great so far. It was really fast to backup the calibration and then "improve" the DMM. The measurements certainly appear stable with 5.5 digits.

I was also curious about continuity test speed since I've seen lots of people complain about that on different high-end DMMs, so I tested it out and made a quick video:


Definitely not slow.
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