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Siglent SPD3303X PSU Set lower current cutoff limit to charge batteries???
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t1d:
I want to charge a LiPo. Its charging board has been removed. I set the 3303's charge voltage as 4.6V and the charge current as 1A, per the data sheet. The data sheet also says the charge is complete when the current = 200mA. What are the 3303's functions to shut off the charge cycle automatically at this lower current limit and how are they set? If I must use EasyPower, please give the details as to the code and how to enter it - I have not used EasyPower to do such a thing. I did read the manual, but did not find the answer.

Thank you so very much, for your help!
t1d:
My PM to tautech =
Quote from: t1d on Yesterday at 11:02:57 pm

    I could use your help with this one, please.

    https://www.eevblog.com/forum/testgear/siglent-spd3303x-psu-set-lower-current-cutoff-limit-to-charge-batteries/

    As always, thank you for all you do for the EE community.

   [t1d]

Hiya [t1d]
Yep seen it and already done some looking for simple answers.
Programming is not my thing but I'd be fairly sure it's straightforward.
The Users guide gives SCPI commands that should enable you to set a channel to OFF when the current reaches your cutout limit.
https://int.siglent.com/u_file/download/22_11_25/SPD3303X_QuickStart_E02A.pdf
Start on P25.

Then you need establish connectivity and I booted EasyPower to see what was available for programming but without a PSU connected the full menus didn't show so unknown if it supports a current cutout without more testing.

I might flick HQ Tech support a message for the command string that would support what you want to do.
Regards
tautech

My reply to tautech =

Thanks, [tautech,]

Thanks for your fast response and expertise!

You are correct, the commands for controlling current in EasyPower does appear to make it doable. But, I am not much of a coder and have zero experience with SCPI... Even the basics, like does it need an IDE and compiler? How is the program communicated; thumb drive, LAN? I am not expecting you to have these answers, of course. Just thinking out loud...

I like your idea of asking HQ. I also need to research the basics of SCPI.

[t1d]
ps I will post our communications to the thread.

t1d:
Ooo, I would have missed this detail... Thankfully, on my first charge, I did not blow anything up. Well, I have not noticed any problems, as of yet, anyway...



mawyatt:
We are not good at software either, but did manage to get various instruments working with remote commands.

Here's a link that included the SPD3303X that you might find useful, and some crude Python routine to control a TH2832 LCR Meter and PS to heat a resistor, very kludge setup for temp sweep to measure device parameters temp effects.

https://www.eevblog.com/forum/testgear/lcr-meter-plot-software/

Edit: See you already posted.
BTW might consider added a series diode (SBD) to keep the battery from discharging back into the PS, or a least a series resistor/fuse to limit current.

Anyway, hope this helps.

Best

t1d:
Thanks, mawyatt! I will give that information a look.

Just starting to research SCPI =
"SCPI (Standard Commands for Programmable Instruments) is an ASCII-based programming language for test and measurement instruments. SCPI commands use a hierarchical structure known as a tree system. Associated commands are grouped under a common node or root, thus forming subsystems. "

Basic Questions For Myself =
Do I need an IDE/Compiler?
How is the program communicated to the PSU? Thumb Drive/USB/etc?

Some resources. I have not looked at them, yet:

https://rfmw.em.keysight.com/bihelpfiles/Truevolt/WebHelp/US/Content/__I_SCPI/Scpi_introduction.htm

https://www.keysight.com/us/en/assets/9921-01870/miscellaneous/SCPI-99.pdf

https://en.wikipedia.org/wiki/Standard_Commands_for_Programmable_Instruments

Cheers!
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