Products > Test Equipment
Keysight DMM - Yay or nay?
blackdog:
Hi Traceless,
The Keysight meters are not bad! I use them almost daily.
I have received over the years very good support from KeySight Netherlands!
But the Autocal is just not well done and not worth spending money on if that is the only function why you buy a 34465a instead of a 34461a.
The calibration/reports from Keysight very also very good, If you buy a 34461 or a 34465a you get a nice calibration report.
With the Keyley DMM6500 you only get one a4 with on it that it is calibrated.
I don't know if this difference is important to you.
Kind regards,
Bram
mawyatt:
--- Quote from: Traceless on March 02, 2022, 09:12:57 pm ---@mawyatt to rule out that blackdog just had very bad luck with his KS meters, did you observe similar auto-cal issues with yours compared to the DMM6500.
Also since both of you @mawyatt and @blackdock have access to a DMM6500, can you by chance tell if a) I can ignore the touch screen and access all functions with the buttons next to the display and b) if the touch screen can be operated with gloves like this?
--- End quote ---
Haven't experienced any Autocal issues with either KS34465A, and the DMM6500 & two KS34465A agree well with our home brew 10V references based upon LM399 (2) & LTZ1000. Like mentioned we also wanted to "see" how good the DMM6500 was compared to the KS34465A and not having any experience over our career with Keithley somewhat concerned about how the DMM6500 would preform. Well it performed admirably and we have no concerns recommending this superb instrument. As mentioned the KS and DMM are good just about everywhere and have specific areas where they excel. Honestly you can't go wrong with either.
No, you can't access all the menus on the DMM6500 with buttons, you'll need to employ the touch screen. Don't have any gloves like shown, but did just use Nitrile Exam Gloves, and no issues with DMM menus.
Best,
Traceless:
Hi Bram,
well the main reason I chose the 34465A over the 34461A is that it has a much higher reading rate 50k rdgs/s vs the 34461A's 1k rdgs/s, I just want to avoid the grief I have with my current meter, which has very slow auto ranging and sluggish AC readings. Aditionally the 34465A's 1µA range is nice to have. Other than that any of these meters probably even the Siglent is more than good enough for my purposes and a quantum leap forward from what I have currently. If I get a new meter this is probably going to be a life-time purchase (unless the device breaks down and can't be reparied) so I do my best to make the right call this time, even if that means stretching my budget a bit.
Traceless:
@mawyatt: Thank you very much for reporting back so quick and also for doing the glove test, you are awesome!
blackdog:
Hi mawyatt, :-)
Regarding the Autocal, Keysight investigated that problem and came to the same conclusion as the measurement report I sent them.
They sent me a measurement report showing the same effect measured in their factory as what happened to me in my lab.
If you use the Autocal function at e.g. 25C lab temperature and say the Keysight DMM shows +2PPM difference from its Cal temperature.
The meter usually corrects that with Autocal, but usually after about 20 minutes your meter will read the same value as before the Autocal function.
This also happens when the internal temperature of the DMM remains the same.
Kind regards,
Bram
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