Products > Test Equipment
DC-Load wanted(Siglent SDL1020X-E found)
mikeselectricstuff:
If you're on a budget, this is hard to beat price-wise.
https://vi.aliexpress.com/item/1005005997230178.html?spm=a2g0o.order_list.order_list_main.5.3ac21802x8cQJa&gatewayAdapt=glo2vnm
I've only given it a cursory test so far but seems to basically work. rate of change of load is quite heavily damped so probably no good for impulse/load-step testing.
Martin72:
I haven't really tested the siglent yet, but I couldn't contain my curiosity and unscrewed it earlier. ;)
The clean build quality is very good, nothing to complain about.
12 IRFP250 FETs do their job there, which should easily be enough to turn the 200W load into a 300W one.
A very small detail also convinced me that the "hack" should not cause any major problems... 8)
Martin72:
After I quickly and successfully "upgraded" the load to a 1030X, it's time to test it too.
However, something came up in between (testing the Micsig CP1003 B), but I'll soon get started.
I will stick to what nctnico tested, it seems to make the most sense to me.
And today the boards for the DIY load arrived, still with the "old version" of my load board, where they had (rightly) criticized the too long feedback paths.
But it was already in production and that's why it's here now. ;)
The temptation is there to fit both revisions and test whether and what difference this makes in practice.
I will soon have completed the design for the new revision.
Martin
oz2cpu:
about siglent SDL 1020
did anyone figure out the internal programming modes ?
like you can make a lot of steps that do any type of mode and feature, and delays and all that,
BUT i am missing a REPEAT or LOOP or goto x step feature ??
the program only run once, and that is far from what i need,
I can ofcourse use a pc to control it, but such simply thing as a loop feature must be there , right ??
forgot to say the DC supplies from siglent wich i also own, dont have loop feature in their internal programming either..
SOLVED : dont use PROGRAM no loop feature to find there..
use the less obvious LIST in here you make a list of settings, and the repeat number can go below 1
if you dial it down there, it will go on forever
5U4GB:
--- Quote from: orzel on January 04, 2024, 02:40:40 am ---Of course it's not a proper/genuine electronic load, it's not even sold as is (it's officially a "battery tester").
--- End quote ---
I may have discovered why, I wanted to measure noise from a random SMPS at different power levels and decided to use one of these to do it. The result was waaay noisier than even a relatively crappy SMPS should be, while a resistor kludge load didn't exhibit the problem. I haven't looked at the loa... battery tester in any detail but it's possible it's using PWM control from the micro that runs it, or at least doing something that makes it impossible to get a reliable noise reading.
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