New Siglent SDM4000A series Multimeter

[2N3055]

What is being discussed here is free running Auto meter mode and data from that process.
But there is Log mode where you set timing and length (time/number of samples) and that one will capture deterministic number of samples.

[Furna]

Having Samba is very convenient to directly save to network share...

Unfortunately the Samba client implementation in firmware ver. 0.0.0.20 does not support encryption of the data transport channel.
I had to revert to "Desired" from the "Required" settings on my NAS for the transport channel in order to mount a share.

[KungFuJosh]

Whatever method they choose, they should make it so it exports the data uncorrupted. Even 1M points is too much in a CSV, unless you're using a script to do something with the data.

[Furna]

In firmware ver. 0.0.0.20 the NTP address is not saved between reboots.
It always reverts to ntp.pool.org

[alicumircea]

Hi,
I am very much interested in acquiring this meter. I have a question for an owner of this meter - I am interested if when in diode mode it continuously beeps if there is a short and if it shorts beep during a normal reading - where there is a normal voltage drop reading. As far as I've seen pictures with menus I assume you can set the long short beep, but there is no video or mention about the short beep.
Thank you very much!

[danno_cj]

Alientek DM40 and Brymen BM788BT works like you want, generate short beep on functional diode and continuous beep on broken one.  Alientek can identify Schottky diode, under 0.02V continuous, between 0.02V - 0.45V two short beep, 0.45V - 0.75V one short beep, 0.75V - 1.45V three short beep. Brymen see only normal diode. Both meter communicate over Bluetooth and have phone app. For Brymen Windows software is not yet ready but you can write your software, protocol communication has been released.

[Martin72]

I'll answer the actual question...

I am interested if when in diode mode it continuously beeps if there is a short and if it shorts beep during a normal reading

In the menu, you can switch the buzzer on/off, change the volume, and set the threshold above which no acoustic signal is emitted.
The diode measurement is very fast; no short beep is generated when measuring the diode path.

[danno_cj]

I know the man and what he want to do so, my post wasn't really off topic. I think he will appreciate both answers. He may still want/buy SDM4000A.

[vsilves]

Perplexed by the lack of full, or at least more in depth, reviews after 7 months form initial show and tell.  Folks seem to have non demo versions available.  Checking outlets in the US still either not available, backlisted, or out of stock.  What was the reason for delay that would become obvious in time?  I still totally don't need it but money is burning a whole in the pocket...

[KungFuJosh]

Perplexed by the lack of full, or at least more in depth, reviews after 7 months form initial show and tell.  Folks seem to have non demo versions available.  Checking outlets in the US still either not available, backlisted, or out of stock.  What was the reason for delay that would become obvious in time?  I still totally don't need it but money is burning a whole in the pocket...

You can thank the orange turd in the oval office for that. Tariffs are not helping international trade.

[vsilves]

Is that it, just tariffs?  Tariff situation does suck, but I did not see any major disruptions on other similar products from the far East.  Also, looking at SDM3065X at Siglent NA, ships in 2-3 days.  However, SDM4065A "Inventory Available on or about 02/05/26".  Three months out, wow!  Are you suggesting all other items were well stocked out from before April's fools day?  Anyway, just wanted to hear if there was anything else going one besides the tariff situation.  I'd rather not hear about it, than hear about it and not be able to get it, haha.

[KungFuJosh]

I'd rather not hear about it, than hear about it and not be able to get it, haha.

lol! Yeah, it is a tease.

I'm sure most of the previously available items were well stocked before the tariff nonsense. Think about this- how many units will they ship to stock a country on a new device? In that case, the tariffs make a huge difference. I'm just speculating beyond that, I dunno how the supply is, but I know from somebody on the inside that the tariff situation has had a major impact on bringing in new devices.

[tautech]

Is that it, just tariffs?  Tariff situation does suck, but I did not see any major disruptions on other similar products from the far East.  Also, looking at SDM3065X at Siglent NA, ships in 2-3 days.  However, SDM4065A "Inventory Available on or about 02/05/26".  Three months out, wow!  Are you suggesting all other items were well stocked out from before April's fools day?  Anyway, just wanted to hear if there was anything else going one besides the tariff situation.  I'd rather not hear about it, than hear about it and not be able to get it, haha.

NA has been slow in adopting the SDM4000A series, noticeably slow from where I sit.

I've always suspected the US tariff situation was the reason as I cannot imagine another.
Unless they had a lot of SDM3000 models they needed to shift first. 

[alicumircea]

He doesn't really want to buy the SDM, he wants a Keithley, but because he can't afford the Keithley, he would go with a clone (SDM40xx)
The truth is that none of these models work in diode mode the way I want... I really don't understand why manufacturers do not implement this diode mode beep function, it's not like it has been patented by Fluke...
Anyway, highly disappointed.

About stocks, they are available in the EU. The 4065v is in stock and 4055 has a 7 days lead time.

[Martin72]

I really don't understand why manufacturers do not implement this diode mode beep function

Perhaps because it makes little sense to implement something like that.
What is the point of the short beep?
To test diodes “blind”?
I wouldn't do that; I would always check the forward voltage as well, and then you don't need an audible signal if you're looking at the display.

[danno_cj]

Right now SDM4055A and SDM4065A are in stock at welectron.com with shipping from Germany.

[vsilves]

NA now shows "Inventory Available on or about 12/22/25".  Today is 12/22 so I guess it is more "about" than "on".

[vsilves]

NA now shows "In Stock: will ship in 1-3 days", yay!

[vsilves]

Wow, NA now "Inventory Available on or about 03/11/26" I guess they only snuck in a few units, or everybody and their mother ordered one.  Was a big enough window.  Got mine, which is all that matters :-)

[vsilves]

Not a lot of videos about this meter online, so adding one.  Maybe not the most interesting feature, but playing around to see how well it can read and follow dBm readings on a 50Ω load, outputting a sine wave out of my SDG2042X into the SDM4065A with a 50Ω thru BNC adapter.

https://youtu.be/d6ZgsBna0v4

Found that the SDM4065A follows very well up to its ACV bandwidth of 300KHz and decently (+/- < 1 dB) to 1MHz.  Not shown in the video, you can go up to 2MHz and 3MHz, but beyond that it saturates and has a hysteresis returning down in frequency that finally resets once you drop to 1MHz.  So very safe to use up to 1MHz I think.

By comparison my trusty Fluke 289 follows noticeable less closely and only up to 100KHz point zero, and is way off for values below -10 dBm or -20 dBm.

[vsilves]

Here is another video showcasing the SDM4065A DCV digitizing abilities.  Using SDG2042X to output a 0dBm square wave at 100Hz, 1KHz, 2KHz, 3KHz, and 5KHz.  Still image below for context (shows 1KHz).

https://youtu.be/z_CfiXbHOLM

The SDM4065A does 50 KSa/sec but the -3dB bandwidth is 10KHz.  The video reflects this.  Once you go above 1KHz the lack of odd harmonics within the 10KHz bandwidth degrades the square wave significantly (as expected).  Does exactly what it says on the tin.

[mawyatt]

Nice looking DMM, Congrats

Nice display, you can easily see the under sampling effects on the squarewave.

Best

[Kleinstein]

It is odd to see the undershoot before the rising edge. This not what one would expect from a DMM, because the ADC is not classical sampling, but a SD type that is more integrating. So there should normally be no digital reconstruction / interpolation filter for the display, like with a DSO.
Some ringing could well be from the analog front end. The version with a driven negative side to get the 20 V high Z range is a bit prone to ringing.

[electr_peter]

Symmetric ringing before & after is interesting, very scope like.

[mawyatt]

Looks like Siglent is using SineX/X reconstruction, maybe they borrowed some of the DSO folks to help with the DMM development!!

Best