Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X

[tautech]

3 Siglent Bench DMM's:

SDM3045X 4 1/2 digit (60,000 count)
SDM3055   5 1/2 digit (240,000 count)
SDM3065X 6 1/2 digit (2,200,000 count)

4.3" colour LCD dual measurement display.
(Changed GUI from FW 16R2)(SDM3055)


The full family and specs:
https://int.siglent.com/products/digital_multimeters/
https://siglentna.com/digital-multimeters/

SDM3065X Released April 2017
SDM3045X New 60000 count 4 1/2 digit model in this series: (released Aug 2016)

Teardown:
https://www.eevblog.com/forum/blog/eevblog-829-siglent-sdm3055-bench-multimeter-teardown/

FW & SW updates:
https://siglentna.com/service-and-support/firmware-software/digital-multimeters/


Recently released option for 3055 and 3065 models in the SDM3*** family is a 16 ch scanner card but it's only for factory installation unfortunately. 




6 1/2 Digit Benchtop DMM: SDM3065X



https://www.eevblog.com/forum/testgear/siglent-new-bench-dmm-sdm3055/msg1016306/#msg1016306

http://siglentamerica.com/prodcut-detailxx.aspx?id=4826&tid=37&T=2

Siglent video:
https://youtu.be/pijpdKbq_O4

Deeper investigations:
https://www.eevblog.com/forum/testgear/hacking-the-siglent-sdm3055/


Early/first SDM3055 releases were as the image below then later versions had X series bumpers/horns added.
The SDM3055 model name was unchanged and SDM3045X and 3065X were released later.

POI list
SDM3045X PCB pics:
https://www.eevblog.com/forum/testgear/siglent-new-bench-dmm-sdm3055/msg1955995/#msg1955995
SDM3055 PCB pics:
https://www.eevblog.com/forum/testgear/siglent-new-bench-dmm-sdm3055/msg1329966/#msg1329966

[Orange]

I have my doubts about the photo, i think it is an very good animated picture straight from an CAD system, Why ?

Look at the back side, and zoom in on the BNC connectors, it's missing a centerpin, Siglent is faking equipment pictures.

[Hydrawerk]

It seems that this is their very first multimeter ever released. Then I do not want it. It has a color LCD, so it must be full of bugs.
I would trust GW Instek multimeters instead. Yes, they make some so-so scopes, but they still work as promised. Almost.

[Wytnucls]

Looks like Applent is also getting on the bench DMM bandwagon. A lukewarm attempt with a 4 1/2 digit meter, using their LCR meter case and eye candy TFT touch screen. They left out the cap measurement, perhaps to avoid denting their LCR meter sales.

http://www.applent.com/products/detail.aspx?familyid=&model=AT186

[tautech]

The datasheet is now available for download from Siglent:
http://www.siglent.com/DataSheet/EN/SDM3055_DataSheet_EN.pdf
http://www.siglentamerica.com/USA_website_2014/Documents/DataSheet/SDM3055x_DataSheet_DS06035-E02B.pdf

[Wytnucls]

Thanks, filled in the blanks on the bench meter spreadsheet. To be published soon.

[Siglent]

siglent new official website has been on-line, for more information, please visit http://www.siglent.com/ENs/pdxx.aspx?id=176&T=2&tid=37

[EEVblog]

The datasheet is now available for download from Siglent:
http://www.siglent.com/DataSheet/EN/SDM3055_DataSheet_EN.pdf

Wow, looks like they completely ripped off the Agilent UI

[nctnico]

siglent new official website has been on-line, for more information, please visit http://www.siglent.com/ENs/pdxx.aspx?id=176&T=2&tid=37

The website looks completely wrong with Firefox version 32.

[smatjaz]

Hello.
I tested the operation of the instrument SDM3055- remote connection via LAN. An error has occurred when setting the LAN parameters. IP number is stored in order, Subnet mask is not saved. Each time the instrument is turned off and turned on, the Subnet mask setting is not saved.

Is this a bug in the software?

Greetings M.

[tautech]

Welcome to the forum.

Better you place this post in this thread:
https://www.eevblog.com/forum/testgear/siglent-technical-support-join-in-eevblog/

Siglent tech support will be online later today to help.

Sorry I have only tried the EasyDMM software with USB and that works great.

[Siglent]

Hello.
I tested the operation of the instrument SDM3055- remote connection via LAN. An error has occurred when setting the LAN parameters. IP number is stored in order, Subnet mask is not saved. Each time the instrument is turned off and turned on, the Subnet mask setting is not saved.

Is this a bug in the software?

Greetings M.

this is a known problem, we have fixed in the coming firmware (11R2), but we will release it in about two weeks.

[zaoka]

this is a known problem, we have fixed in the coming firmware (11R2), but we will release it in about two weeks.

Is there a way to increase Diode voltage limit to 3.0V instead of 2.0V?

[zaoka]

Also sampling time for DC, can you add 5 times per second as well?

[Siglent]

Also sampling time for DC, can you add 5 times per second as well?

Thanks for your suggestion. but can you explain why you need to add this feature?

[tautech]

The datasheet is now available for download from Siglent:
http://www.siglent.com/DataSheet/EN/SDM3055_DataSheet_EN.pdf

Wow, looks like they completely ripped off the Agilent UI

Been wondering for some time about that. 

Inspired by this post a couple of weeks ago: https://www.eevblog.com/forum/testgear/keysight's-new-34465a-(6-5-digit)-and-34470a-(7-5-digit)-bench-multimeters/msg626032/#msg626032

I thought I'd better take a deeper look just in case the Agilent was a rebrand. 
SDM3055


Wow I thought, they share the same Lattice chip, but no they are different beasts.
White silkscreen indicates where the sheilding cover (left) resides, held by a single screw.
Omron relays and just right a SIL Caddock resistor network.
Note the gold guard traces.



Mains transformer is sheilded from the main PCB and the PSU is a linear type, rectification and smoothing on the main PCB, TO-220 7805 regulator

[DJ]

I was on the fence between the SDM3055 and the Agilent 6.5/7.5 DMM's.

Glad I did not jump the gun one way or the other. A good bench DMM is an essential piece of kit, whose readings must be beyond question. It forms a core of a lab.

Other instruments may slide with less absolute accuracy. An AWG, for example. Typically not a reference instrument,  do I care if it wanders over time or is not absolutely accurate?  Probably not. I have other equipment which can verify amplitude and frequency accuracy.

The instruments used to verify others should be 10x better.

So I've chosen the Agilent 6.5 digit, probably the 34465.

One the other hand, Siglent got the nod for the SDG5162.


This might serve as basis for a video, " Where to spend money where it counts in your lab"

[Muttley Snickers]

A very nice choice DJ, but as you have pointed out in your case the requirement was for an accurate stable meter that you could trust every time in the lab, in no way am I comparing the Siglent to the Agilent, the Agilent is leaps and bound's ahead.

In my case it's reliability, practicality and functionality, particularly with the logging feature's, we have in the past been using either Fluke 189's or Agilent U1272A's on a variety of sites generally to monitor feeds, contacts, sensors and temperature on varied machinery.

We seem to get called in when the machinery supplier's and the site electrician's start blaming each other and butting heads where neither are equiped to find a solution. The problem we have with this scenario is that we require a UPS, power supply and then the meter and I'm not a big fan of leaving a fluke on any site for long term as we have found in the past that they have a habit of growing legs and wandering off.

We also have at times simply put everything in a locked cabinet, big battery and a power supply for stand alone logging independant from mains supply, pretty pointless having an extended logging or capture feature on any meter if you cant remotely power it or disable the Auto Power Off for longer terms.

Anyway, for all you other people following, here's a good project for you to do, go and see what your bench logging meter does when powered from a UPS and the mains is removed, please post you results regardless of the brand of meter.

I'm still on the fence, dont need super accuracy but do want better than ball park, I'd rather two meter's covering a few bases over the same time period if required, Real time clocked events are a must and if the meter is not equiped then the trigger out feature would be used as an input to a RTC data logger with a time stamp.

If it was only for the lab and nothing else, I would follow what DJ has done...


Muttley

[zaoka]

Also sampling time for DC, can you add 5 times per second as well?

Thanks for your suggestion. but can you explain why you need to add this feature?

When you use meter for troubleshooting and do pin-point measurements, probes are very sensitive if moved and meter captures those changes... reading changes fast...

5 readings per second is the best for this...

Keep in mind that not everybody uses meter for the same purpose.

[tautech]

Also sampling time for DC, can you add 5 times per second as well?

Thanks for your suggestion. but can you explain why you need to add this feature?

When you use meter for troubleshooting and do pin-point measurements, probes are very sensitive if moved and meter captures those changes... reading changes fast...

5 readings per second is the best for this...

Keep in mind that not everybody uses meter for the same purpose.

P 11 of the Manual describes the selection of measurement speeds. Three speeds are available.
They are 5/sec, 50/sec and 150/sec. These options are available in: DCV, ACV, DCI, ACI and 2 & 4 wire resistance settings.
When any of these measurement types are selected, the 2nd softkey (from left) named "Speed" allows selection of any of these 3 available measurement speeds.

[Muttley Snickers]

Does anybody know what the available screen colour's are ?

So far I've seen navy blue and black, dont want to clash with my yakka overalls, nothing in the manual about it except for testing the display.


Muttley

PS: Anyone else posting from a TV finding that after you post the spelling turn's to shit, you then go back fix a typo, re-post then there's another word up the shit. This is my forth edit just on the above paragraph, it's driving be bonker's and I dont need a TV's assistance to miss spell word's, I'm highly skilled at that.

[tautech]

Oh Muttley, sorry about the overalls, they will have to go. 

There is no other screen options available that I could find, the surrounds are Grey, display background Navy blue and numbers, bar graphs etc are Yellow, not the Orange as seen on images on Siglent sites. Banana Yellow is my best description of the colour.
Other UI colours are white and light blue as seen on the website images

The yellow is very easy to see at a glance(when probing) and from good distances if monitoring a measurement. I guess Siglent have changed the colour from their early documentation for visibility reasons.
http://www.siglentamerica.com/pdxx.aspx?id=176&T=2&tid=37

The second screen image from the bottom is the UI that one uses most often, except this one has the Dual measurement activated.

Keep in mind this is a reasonably new product, there is more FW due very shortly (Siglent posted this is so) and options of more enhancements is up to us to identify them and lobby Siglent for changes or more features.

Sorry Muttley, you'll just have to get a fashion consultant so you don't clash with your TE. 

[Muttley Snickers]

Bugger tautech,

I dont want to look like a dummy....



This picture was to good to leave without some further enhancement, so here it is...

Mo: "Your joking, but they said it was just a mobile phone".
Jo:  "No Mo, they said it was to fix the mobile phone".
Mo: "It's not going to happen dude".
Jo: " It's this, the bench meter or the ass-silly-scope".
Mo: "

Muttley

[tautech]

I have recently been asked now the SDM3055 might measure V & A simultaneously.
It is accomplished in much the same way as other meters.

This is a 3 wire measurement with Neg used for both measurements.
For Volts connect leads across of course, and Amps in series.

Select the primary measurement you are interested in. DCV
Then select "Dual" and for SDM3055 then "Shift then DCI".

Then the internal relay switches between the 2 measurement modes @ ~ 1 Hz.
The readings are stable on the display, no switching or flickering just constant.

The main display readout can be toggled with the "Dual" key to show the other Dual measurement as the main measurement, back and forth as you please.

[Wmacky]

I wonder if this unit would be a big upgrade for someone using a Fluke 87V for bench work?