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| Any comment on Keysight 34450A continuity? |
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| wraper:
--- Quote from: nctnico on March 09, 2024, 11:40:19 pm ---Well, I already have a Keysight 34461A but I don't like it as a daily driver for several reasons. The continuity beeper has so much delay that I'll have repositioned the probes before it starts to beep. --- End quote --- Sounds like you're running it with extremely outdated firmware, like 1.x or early 2.x |
| J-R:
Continuity on my 34461A is instant. Maybe yours has an issue that could be corrected, such as probes or firmware? I'm using the probes that came with it as well as the latest firmware. The fan noise is absolutely an issue and I replaced mine as soon as I got it. I went with the Noctua NF-A4-20 5V and am running it a bit slower as well just to make it essentially silent. Zero impact to the accuracy. I suggest the 20mm instead of the 10mm to get the airflow closer to stock. Also be sure to use the rubber mounts. |
| wraper:
--- Quote from: J-R on March 10, 2024, 12:03:18 am ---Also be sure to use the rubber mounts. --- End quote --- Rubber mounts are only somewhat useful if the fan is an unbalanced garbage that is mounted on something thin and lightweight. Otherwise they have no positive effect. |
| TheSteve:
The 34461A continuity is much better than the 34450A. I have no issues with it(except for a brief period when it sucked with older firmware). I've never had an issue with the fan in my 34461A, it has always been quiet with no annoying high frequency component etc. It is the quietest fan in any of my bench devices. You could also disable the fan altogether if you don't mind more thermal drift. The 34460A has no fan. The 34405A was not made by HPAK, I do believe the 34450A was(but not by the same division that makes the 3446x. |
| nctnico:
--- Quote from: wraper on March 09, 2024, 11:59:47 pm --- --- Quote from: nctnico on March 09, 2024, 11:40:19 pm ---Well, I already have a Keysight 34461A but I don't like it as a daily driver for several reasons. The continuity beeper has so much delay that I'll have repositioned the probes before it starts to beep. --- End quote --- Sounds like you're running it with extremely outdated firmware, like 1.x or early 2.x --- End quote --- My unit was on older firmware indeed (I got one of the early models when it came out around 2015). I have downloaded newer versions but never got to installing it until now. I have not checked whether continuity is better or not. --- Quote from: TheSteve on March 10, 2024, 12:22:41 am ---The 34461A continuity is much better than the 34450A. I have no issues with it(except for a brief period when it sucked with older firmware). I've never had an issue with the fan in my 34461A, it has always been quiet with no annoying high frequency component etc. It is the quietest fan in any of my bench devices. You could also disable the fan altogether if you don't mind more thermal drift. The 34460A has no fan. --- End quote --- Continuity being worse on the 34450A is good info. Fortunately my lab is rather quiet so the fan noise does stick out. But maybe getting a 34460A isn't such a bad idea after all; still I'd really like the hard power switch. |
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