| 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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