Author Topic: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X  (Read 162676 times)

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Offline tautech

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #600 on: July 06, 2020, 12:56:59 pm »
I was thinking about getting a 3045X or 3055 (once there's some followup on klaus' issue) and was wondering about calibration.

Has anyone sent their siglent DMM out for cal or found a local place that can do it? I'm just concerned about finding places that will cal things other than fluke & keysight. I'm in the US and there's no cal labs locally except the one at work and we can't use that unfortunately. So really I'd be looking for some place I can ship it to.

Transcat is their main one

https://www.transcat.com/

https://siglentna.com/service-and-support/calibration-certificate/
A User Cal manual procedure is under development that any Cal lab could also use as they have good references to apply if adjustments are required. I have a draft for the 3065X but it's secret at this time sorry.
It's apparently gunna be available for 3055 models too.
Otherwise it's something like a Fluke universal calibrator PC controlled with scripts from the Siglent factory.
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Offline Gridstop

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #601 on: July 06, 2020, 01:48:34 pm »
If currently the only option is to send it to transcat, has anyone done that and how much did it cost and how long did it take? Kind of annoying when a company sets it up so only one place can do maintenance on something but the only way to find out how much it costs is to go manually request quotes for everything.
 

Offline PushUp

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #602 on: July 06, 2020, 08:31:04 pm »
I was thinking about getting a 3045X or 3055 (once there's some followup on klaus' issue) and was wondering about calibration.

When you wanna buy a new one, Welectron directly offers both calibration methods for each Siglent SDM; you may also profit from germany's tax reduction from 19% down to 16% till the end of the year, in order to boost the economy during these Covid19-times:

Just have a look...at the moment Welectron is a few cents cheaper than Batronix...

...you may have to convert into $$$...

SDM3045X - 427,93 Euro
https://www.welectron.com/Siglent-SDM3045X-Benchtop-Multimeter

SDM3055 - 520,54 Euro
https://www.welectron.com/Siglent-SDM3055-Benchtop-Multimeter

SDM3065X - 798,35 Euro
https://www.welectron.com/Siglent-SDM3065X-Benchtop-Multimeter

Always the same price:
+ ISO-Calibration - 131,60 Euro
+ DAkks-Calibration - 184,23 Euro


Cheers!
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Offline Elasia

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #603 on: July 07, 2020, 05:38:44 am »
I was thinking about getting a 3045X or 3055 (once there's some followup on klaus' issue) and was wondering about calibration.

Has anyone sent their siglent DMM out for cal or found a local place that can do it? I'm just concerned about finding places that will cal things other than fluke & keysight. I'm in the US and there's no cal labs locally except the one at work and we can't use that unfortunately. So really I'd be looking for some place I can ship it to.

Transcat is their main one

https://www.transcat.com/

https://siglentna.com/service-and-support/calibration-certificate/
A User Cal manual procedure is under development that any Cal lab could also use as they have good references to apply if adjustments are required. I have a draft for the 3065X but it's secret at this time sorry.
It's apparently gunna be available for 3055 models too.
Otherwise it's something like a Fluke universal calibrator PC controlled with scripts from the Siglent factory.

/steals draft

How far off do you think they are?  Also is there a cal piece for the SC that you have seen?
 

Offline tautech

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #604 on: July 07, 2020, 08:52:45 am »
I was thinking about getting a 3045X or 3055 (once there's some followup on klaus' issue) and was wondering about calibration.

Has anyone sent their siglent DMM out for cal or found a local place that can do it? I'm just concerned about finding places that will cal things other than fluke & keysight. I'm in the US and there's no cal labs locally except the one at work and we can't use that unfortunately. So really I'd be looking for some place I can ship it to.

Transcat is their main one

https://www.transcat.com/

https://siglentna.com/service-and-support/calibration-certificate/
A User Cal manual procedure is under development that any Cal lab could also use as they have good references to apply if adjustments are required. I have a draft for the 3065X but it's secret at this time sorry.
It's apparently gunna be available for 3055 models too.
Otherwise it's something like a Fluke universal calibrator PC controlled with scripts from the Siglent factory.

/steals draft
:-DD
Quote
How far off do you think they are?

Dunno but they got another stir up yesterday.  :horse:
If nothing in a month I'm going looking for heads as they've had quite long enough to get their shit together.  :rant:
Quote
Also is there a cal piece for the SC that you have seen?
Shouldn't be needed as the DMM's controller just connects the SC inputs into the SDM measurement chain so if the ranges are to spec so should the SC inputs be.
Maybe when the User Cal document is finished there will be SC info included.
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Offline TheDefpom

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #605 on: July 07, 2020, 09:18:34 am »
Maybe when the User Cal document is finished there will be SC info included.

I was wondering if I should do a video about the user cal (once it can go public), I'm not sure how much I can say about it right now though, I'm assuming nothing :-)
Cheers Scott
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Offline tv84

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #606 on: July 07, 2020, 09:43:58 am »
I was wondering if I should do a video about the user cal (once it can go public), I'm not sure how much I can say about it right now though, I'm assuming nothing :-)

My vote: YES
 

Offline klausES

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #607 on: July 07, 2020, 11:35:40 am »
My Also  :-+

Do it.  :-/O
regards klaus. "Art is when you can't do it ... because if you can, it's not art"
 

Offline Elasia

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #608 on: July 07, 2020, 02:55:15 pm »
Maybe when the User Cal document is finished there will be SC info included.

I was wondering if I should do a video about the user cal (once it can go public), I'm not sure how much I can say about it right now though, I'm assuming nothing :-)

+1
 

Offline ercapoccia

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #609 on: July 18, 2020, 02:01:36 pm »
How noisy is the fan of the SDM3055? Is the fan-less SDM3045X a better choice for a quiet lab?
 

Offline tautech

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #610 on: July 18, 2020, 02:58:08 pm »
How noisy is the fan of the SDM3055? Is the fan-less SDM3045X a better choice for a quiet lab?
You know it's ON so yes if you want real quiet get the 45X instead.
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Offline klausES

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #611 on: July 18, 2020, 11:38:07 pm »
Or they rebuild the fan story of the 3055/65 almost silently like I did.
In terms of space and design, this is very possible with many Siglent devices.
regards klaus. "Art is when you can't do it ... because if you can, it's not art"
 
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Offline MathWizard

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #612 on: July 20, 2020, 04:10:29 am »
What is the 3065X like side by side w/ the 34461A and 34465A ? The last 1 is about $700-800 more, but just wondering.

For people that have the the 3065X, what other 6.5DMM would you say is most similar ? or you rank around the same?

I know I'd love 1 and the price, but there's lots of options, new and old.
 

Offline Kleinstein

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #613 on: July 20, 2020, 05:53:43 am »
The Rigol DM3068 should be relatively similar.  With the keysight meters it would be more the 34450 or 34460.
The DMM6500 would also be a little similar though with some extras.

The SDM3065 / DM3068 use an SD-ADC chip and this has some effect on the performance: quite good in the non AZ mode, but with a slightly higher INL than the usual separate build ADCs.
 
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Offline ercapoccia

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #614 on: July 20, 2020, 01:39:31 pm »
Are you guys checking if the meter is drifting over time? Just wondering how stable it is.
 

Offline eplpwr

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #615 on: July 20, 2020, 03:41:12 pm »
What is the 3065X like side by side w/ the 34461A and 34465A ? The last 1 is about $700-800 more, but just wondering.

For people that have the the 3065X, what other 6.5DMM would you say is most similar ? or you rank around the same?

The 3065X is ... similar. Almost like they copied the 3446x U.I. Siglent did a decent job with the 3065X, but compared to the 34465A it feels cheap and a little slow to respond. The 3065X works, but don't have the premium feel to it.

Are you guys checking if the meter is drifting over time? Just wondering how stable it is.

Yes. My 3065X-SC drifted out of spec after 2 months. If you find an old datasheet for the LM1/2/399; the drift matched a fresh (not burned in) LM399 rather precisely. The A-brands have some sort of burn-in and selection process.

There is maybe a calibration document coming out, then the meter may become useful again.

I opened my meter on day 1. Thus no warranty. Also, I find it meaningless not being able to adjust the meter myself.
« Last Edit: July 20, 2020, 03:43:04 pm by eplpwr »
 
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Offline joxelito

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #616 on: August 08, 2020, 11:48:55 am »
I was near to buy some of the SDM Multimeters, but SDM3065X  drift, fan noise, firmware bug not solved on many months on SDM3055....

Would you buy again?

 

Offline klausES

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #617 on: August 08, 2020, 10:11:08 pm »
There is also fan noise in many other and more expensive devices.
You can do something about it.
(Fuck the guarantee. I'm not annoyed for 2 years with something that would bother me every day,
just to sit out the guarantee period ... it would be my nerves).

Otherwise I feel torn back and forth.
On the one hand, these SDMs offer good hardware for the price, the material and the feeling are good and they are very robust for daily use.

An SDM 3055 has been in use for several hours every day for almost 8 months and a drift
(compared directly after the purchase and now no drift at all) is not noticeable in mine.

On the other hand, I get annoyed every day that Siglent just tacitly decided not to do anything more to fix the software errors.
In the meantime it has reached a level with me that I think more and more often that I would rather spend more money on the next device than feel ignored again.
(Ok, but we all know that even a two hundred thousand dollar car is not flawless...)

It's actually a shame, because without these software errors I could call the 3055 a very reliable and good device without reservation.
regards klaus. "Art is when you can't do it ... because if you can, it's not art"
 
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Offline TheDefpom

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #618 on: August 08, 2020, 11:36:12 pm »
I have been very happy with my 3065X, I just picked up a recently calibrated HP3457A, and the comparisons I have done so far show that the 3065X is holding its original cal pretty well (I have had the 3065X for a couple of years now), sure there is a little difference between the two meters but it is only about 20-50 counts in most cases (AC at frequencies above 100KHz shows a larger difference, in favour of the SDM3065X!).

It is worth noting that the SMD3065X actually has some of its specs being better than meters like the HP3457A! AC is certainly of higher accuracy on it.

I don't even notice the fan noise from it, sure it is there but it isn't that loud, I certainly have gear here that drowns it out completely !
« Last Edit: August 08, 2020, 11:46:39 pm by TheDefpom »
Cheers Scott
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Offline Calvin

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #619 on: August 09, 2020, 02:38:59 am »
Hi,

once a year I calibrate test resistors at work with a then freshly calibrated HP34401.
I crosscheck with my SDM3065X. Both DMMs run in high resolution lownoise mode with at least 100 samples averaged.
While the Siglent scores with its display, the HP scores with resolution.
What does that mean? Well, when You recall the recorded max. min. and avg. values the HP presents 6.5 digit values combined with a sensible change in units.
The Siglent displays the values with lower resolution and the switching between units is inferior.
This can make up to 3-4 digits in displayed resolution.
I regularly find this behaviour disappointing, since the Siglent is on par with the HP resolution-wise from its hardware and this issue is just a matter of a still buggy firmware.
In other words Siglent doesn't utilize the potential of their hardware.
Especially when I switch the device into its highest resolution measurement mode I expect to see high resolution measurements.
I didn't  buy a  considerably more expensive 6.5 digit DMM just to be presented with down to only 3.5 digits of resolution.
Since the last recent update took Siglent more than a year I'm afraid that a fix of this bug will take also a long time .... if ever it gets fixed.
While Siglent seems eager to update their shiny DSO and analyzer products fast the SDM3065X appears to be handled like a disbeloved child.
The SDM3065X is my only Siglent device I actually doubt to have made the best buy decision.
Once a year I come to point of thinking that the not-so-much-more expensive HP34461A might have been a better choice ... or a used 34401A.

regards
Calvin
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Offline MathWizard

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #620 on: August 09, 2020, 04:14:37 am »
Some good points to think about. I'm really disappointed the 34465A doesn't have any dual display, and that the DMM6500 barely has real buttons and a loudish fan.

So what about the older 3065X firmware's, did they fix stuff but break something else in the newest 1? Is it the type of stuff where 1 user might be fine with an older version, and others might be fine with the latest release ?

If I really want to "cheap-out", I'll get the 34401A, at least they are repairable to a degree, but it's like the steam-age compared to today's DMM's, or well the 1980s
 

Offline ercapoccia

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #621 on: August 09, 2020, 08:04:58 am »
that the DMM6500 barely has real buttons and a loudish fan.

The Keithley meter has a different design with a big touch screen. You may like it or not, but it can't be listed as a defect, it is a feature that make the meter unique. But for sure it is not for everyone.

Here in EU the price difference between the SDM3065X and the DMM6500 is less than €200 and less than €300 compared with the 34461A (where they completely copied the UI).

I'd go with Keysight if you like the UI or with Keithley if you need the extra features

 

Offline Kleinstein

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #622 on: August 09, 2020, 08:22:16 am »
For the comparison keep in mind the SMD3065 has a 20 V range, not just 10 V like the HP meters. It may be about the mode up to 20 V, not just the extra counts.

 

Offline Calvin

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #623 on: August 09, 2020, 06:42:16 pm »
Hi,

in normal measuring mode both the SDM065x and the 34401 are quite on par.
The difference in displayed resolution is found in the logging mode.
Say we take 100 samples of 1,000000mV with the 6.5digit lownoise setting.
The HP may show a min-value of 0.999983mV while the siglent may display the same value as 0.000999V.
This rather crude behaviour regarding the switching of units in logging mode is disappointing to say the least ... or buggy to put it frankly.

@Mathwizard: as far as I know, they fixed bugs with the lastest update and didn´t introduce new ones or inferiorated other functions.

reards
Calvin



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Offline joxelito

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Re: Siglent Bench DMMs SDM3065X, SDM3055 and SDM3045X
« Reply #624 on: August 09, 2020, 09:13:20 pm »
So logging mode is useless  :-[
 


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