| Products > Test Equipment |
| Keysight (lack of) calibration & other services |
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| bd139:
There are of course other vendors such as Time, Keithley, Transmille if a moderately drifty reference isn't your thing :) |
| 2N3055:
--- Quote from: tggzzz on August 23, 2021, 08:12:36 pm ---HPAK's 6+ digit DMSs have a reputation for using selected voltage references, and they appear to be relatively stable. ISTR reports that ?Silglent? equivalents are less stable. More subtle than a display failure, but invisibly problematic. --- End quote --- 34465 and 34470 probably do use aged refs. 34461 and 34460 don't. They do drift in a first year too. 34465 and 34470 do too but not much. After a year they all get very stable though. So you would really want to buy new one, and have it adjusted after a year. Then it would be really good. Truth is, my Rigol DM3068 also did drift a bit in first year. Now it's 3 something years old and the last year or two didn't move much, few ppms.. It is easily on par with 34465. It is not only reference, resistors need to recover from thermal shock and go through initial aging. Board has to settle too. Problem is that you would really want to keep sending it for yearly checks anyways. Especially if you have only one. If you have 3 meters of comparable accuracy, you cross check as sanity check and for non critical work you're good. But if you have only one, you never know... And there is the point where you need service.. |
| BU508A:
Looks like Daniel is active here in the forum but for some reason he doesn't want to respond here or in the other thread with the broken 34470A. Imo not the best PR Keysight is performing here. :( |
| 2N3055:
--- Quote from: BU508A on August 24, 2021, 12:04:33 am ---Looks like Daniel is active here in the forum but for some reason he doesn't want to respond here or in the other thread with the broken 34470A. Imo not the best PR Keysight is performing here. :( --- End quote --- I would not lay it so hard on Daniel. If what we see is change by corporate decisions (as it seems to be) his hands will be tied, and he might even be ordered not to comment. You can see that people are being served exact phrases and language carefully crafted by lawyers. In my experience, Daniel helped to many people above and beyond on many occasions, even volunteering to help, without help being directly solicited. So maybe we should be fair to him and not make this situation uncomfortable, where he is put in a position that he is "demanded" to do something he cannot do. So maybe a bit of camaraderie for our colleague, Daniel "the person".. I'm sure many of use have been in similar situations.. Regards to all. |
| BU508A:
You should read a little more carefully what I wrote and how. Daniel is very helpful and supports people where he can. I am well aware that Keysight may have muzzled him, which is why I blame Keysight for the poor PR and not Daniel. |
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