Products > Test Equipment

E36300 Series Programmable DC Power Supplies (E36311A, E36312A, E36313A)

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Ahrenp:

--- Quote from: glowitz on December 14, 2017, 09:33:47 pm ---Keysight wants my unit back for evaluation but after visiting this forum I see that at least one or two others have reported similar issues with an audible buzz or noise. In my case, the fan is not on -- as it happens even overnight with nothing turned on (I've captured the transient in a power data logger, showing the instrument side of the load).

--- End quote ---

Your buzzing issues sound exactly like mine. I have contacted Keysight with this issue as well but it has been several days and I have not yet heard back from them. For now I guess I will continue to turn off my surge protector after every use.

adamgreig:
Hey glowitz, just to be clear, it's not my video - I just found it on the contest forum thread and re-posted it here! Though I have also encountered the occasional hard UI lock-up and the video's suggestions for other features are excellent. On the whole I've found since I mostly just type in my desired voltage and current it works extremely well and has been significantly nicer to use than my old adjutable-pot PSUs. Just that with a few firmware tweaks it could be nicer still!

I notice the JTAG port for the STM32 running the show is extremely easily accessible, and the current firmware image is available for download, which suggests some mileage in aftermarket firmware...

Keysight DanielBogdanoff:
Just so everyone knows, we are monitoring this thread. I have no info right now regarding updates, but will be sure to alert you all once I have info!

bitseeker:
Thanks, Daniel. I hope you get a big Christmas bonus. It seems you've become Keysight's spokesman and friend of the community for every product line they make. :-+

Ahrenp:
Today I wanted to do some quick LED voltage measurements for a Christmas decoration project I am working on. I set the channel one voltage on my E36312A to 5V and the current limit to 10mA. I expected the power supply to limit output 10mA at the LED forward voltage, but instead I got an output of 5.000V at 19.266mA.  :-//

Also, to quiet down the buzzing when not in use, I have been switching off my surge protector. This results in almost 8V open circuit at the output of channel 1 when I turn my surge protector on, or ~0.3V, 3.8A short circuit, which was enough to kill a bunch of breadboarded LEDs. So I guess from now on I'll be disconnecting everything in addition to turning of my surge protector.

Am I just being picky at this point? I feel like these things should not be issues on an $1800CAD instrument.

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