Siglent SPD3303X and SPD3303X-E Power Supplies

[tautech]

Geez that does look nice. I wish I could afford it!

Yeah I know, hummed and harred for a while but after using one will get a SPD4306X for myself and another for our local YouTuber Defpom.

[mawyatt]

I'm considering the SPD3303X vs the SPD3303X-E. I am wondering if it is worth it to upgrade from the X-E model to the X model for the 1mV/1mA resolution? I do a lot of microcontroller projects that generally have onboard regulators, so I don't think I will benefit from the X model over the X-E model. Does anyone have any thoughts on the comparison?

We have 3 of the 3303X-E that have been "upgraded" to 3303X.

These produce a stable, clean, and accurate output, however output terminal spacing is non-standard and the UI is sorta quirky. Earlier versions had issues with an overheating bridge rectifier causing random resets. Newer versions this is fixed, altho we've only experienced the random resetting in 1 of the 3 we have (all older versions).

If you can live with the terminal spacing and quirky UI, then they present a good value. The newer 4000 series looks interesting, but at additional cost!!

Best,

[tautech]

If you can live with the terminal spacing and quirky UI, then they present a good value. The newer 4000 series looks interesting, but at additional cost!!

Certainly, however look at the additional they offer:
4 fully adjustable channels, all 1mV/1mA resolution.
2 remote sense channels.
Numeric keypad
3/4" terminal spacing 
Webserver
2x USB-A

Quite interested to give one a decent workout...........

[AVGresponding]

3/4" terminal spacing 

19mm spacing? Did the designer make a mistake?   

I thought later X-E's are not hackable to X?

[tautech]

3/4" terminal spacing 

19mm spacing? Did the designer make a mistake?   

I thought later X-E's are not hackable to X?

FFS keep up with the play ! 
https://www.eevblog.com/forum/testgear/siglent-spd3303x-e-hi-resolution-output-unlock/msg5586827/#msg5586827

[KungFuJosh]

It took 42 days in transit, and Rob says it probably won't help with the sketchy part in the PSU, but the DC load finally arrived.

[KungFuJosh]

What's the maximum parallel current level supposed to be? I didn't see a number specified in the datasheet or manual. For some dumb reason, I thought maybe closer to 6.4A.

If I set the load above 6.17A, the PSU LEDs turn red and it starts beeping. That's with CH1 at 3.2A, and CH2, under 3A. This happens whether or not CH3 is active. PSU max power is supposed to be 220W, but it's under 195W and still whiney.

[tautech]

What's the maximum parallel current level supposed to be? I didn't see a number specified in the datasheet or manual. For some dumb reason, I thought maybe closer to 6.4A.

If I set the load above 6.17A, the PSU LEDs turn red and it starts beeping. That's with CH1 at 3.2A, and CH2, under 3A. This happens whether or not CH3 is active. PSU max power is supposed to be 220W, but it's under 195W and still whiney.

Probably need to use a sense connection on your load for accurate readings from a banana lead connection.
Consult the Quick Start guide for Series and Parallel output.
P14/15
https://int.siglent.com/u_file/download/22_11_25/SPD3303X_QuickStart_E02A.pdf

[KungFuJosh]

Probably need to use a sense connection on your load for accurate readings from a banana lead connection.
Consult the Quick Start guide for Series and Parallel output.
P14/15

Thanks, I have all the manuals. I consulted P15 before setting it up.

Why wouldn't the display on the SPD3303X be trustworthy for its output? The SPD channels say 3.199 + 2.94 = 6.139A. The load display says 6.14A. Why shouldn't I believe them both? I can run some regular wires if you think that matters.

[tautech]

Try setting AC In Line voltage for best match to your actual line voltage.....might help, dunno.

[KungFuJosh]

If you mean powering either device, it's already set that way.

I ran one of my DMMs in series with the circuit, and current display agrees on all devices. 🤷

[MildInductor]

KungFuJosh do you like your SDM3045X that I see in the photo? I am considering getting a Siglent DMM in the near future. The SDM3045X looks to be quite a few years old now. Perhaps you know if Siglent is going to refresh these series of DMMs soon tautech?

[MildInductor]

It seems like Siglent is transitioning their product line away from the classic white to the new black shade if I am not mistaken…

[KungFuJosh]

KungFuJosh do you like your SDM3045X that I see in the photo? I am considering getting a Siglent DMM in the near future. The SDM3045X looks to be quite a few years old now. Perhaps you know if Siglent is going to refresh these series of DMMs soon tautech?

I like the Siglent bench DMMs a lot. I usually use my SDM3065X more, but I often like using the SDM3045X (which is upgraded to SDM3055X-E) because it has no fan.

The other series (dark case) of Siglent DMM you're thinking of is different. The SDM4000A meter series is considered professional, and comes with the pro price tag too.

[MildInductor]

Good to know.

Thanks.

[tautech]

I am considering getting a Siglent DMM in the near future. The SDM3045X looks to be quite a few years old now.

Sure but constantly being improved by way of minor changes to HW.
For the average Joe and even repair shops the 3045X is quite popular and dead quiet, an advantage when ON all day.

Perhaps you know if Siglent is going to refresh these series of DMMs soon tautech?

Only by way of a new SDM4000A series as Josh explained but won't be available until next year.
AFAIK a 4.5 digit model won't be included. 

[MildInductor]

Got it, thanks.

[MildInductor]

A bit off topic… but I wonder what SDM, SPD, SDG, and SDS stand for in the prefix of the Siglent model naming?

SDM would stand for Siglent Digital Multimeter I suppose. I don’t know about the others though.

[KungFuJosh]

My SPD3303X is off to Siglent NA for warranty repair. It had an issue where it couldn't get to the max current level in parallel mode. Hopefully I get it back quickly, I gave away my old PSU.

[KungFuJosh]

My SPD3303X is off to Siglent NA for warranty repair. It had an issue where it couldn't get to the max current level in parallel mode. Hopefully I get it back quickly, I gave away my old PSU.

I got word today that my V3.0 hw has been upgraded to V6.2. I'm looking forward to getting it back.

Thanks,
Josh

[KungFuJosh]

It's alive!

New hardware came with a new serial number, that's cute.

Also a new firmware version that isn't on the website: 1.01.01.03.11R1

I couldn't go above ~6.17A before, now I have to go above 6.44A before it shifts to CC mode on both channels and the voltage drops. Besides being better than expected, that's a huge improvement since it failed and freaked out with beeping noises on the old HW version over 6.17A.

It's been running stable for a little while now, and the only change is when the load fan turns on and off occasionally.

Siglent support is awesome.

Thanks,
Josh

[KungFuJosh]

The ET5420A+ is the load being used. Every time the fan turns on, the current draw dips. Then it climbs back up, and the fan comes back on. It's not drastic, but it's still kinda funny.





ETA: Here it is again, this time for a couple hours: