| Products > Test Equipment |
| Keysight's new 34465A (6.5 digit) and 34470A (7.5 digit) bench multimeters |
| << < (26/145) > >> |
| economist:
--- Quote from: Sparky on March 10, 2015, 05:56:05 pm ---Did anyone get the Digitize (DIG) option? I would love to hear what maximum sustained sample rate is possible when simultaneously transferring data to a PC with USB and LAN connections. --- End quote --- I'm interested in the targeted use case for the digitizing functions of these DMMs (both the two Keysights and the Keithley 7510). I know the usual response is "if you can't think of a need for it you don't need it". But being a hobbyist I've stumbled onto needs I had no idea I would have at the time of purchase. A good example is buying a scope and then later coming up with a project where I really needed serial decoding -- a concept that was entirely foreign to me a year prior when making the scope purchase decision. So, what is the best use of these digitizing options? Don't get me wrong -- I can certainly imagine having fun with that functionality and using it. I just wonder what a real professional would do with it. |
| AndyC_772:
A few years ago, I measured the output of a prototype DC power supply with a cheap Tenma DMM (a tool which, I should add, I used on a daily basis for many years and which was generally both accurate and trustworthy). The reading was a few volts higher than it should have been, and I spent a while probing around the circuit to try and figure out why. It turned out to be noise on the output, which was upsetting the DMM and causing it to misread. Give or take a capacitor or two, the PSU itself was fine. The noise was visible with a scope, but that's less convenient, and not isolated. A 34465A with digitiser could, potentially, have shown not only the correct DC voltage, but also detail of the noise. If I had any other ideas, I'd have the DIG option for my 34465A. |
| Lizerd:
I use the 34411a at work all the time in the 50KHz sample rate mode, I built a C#/WPF application that handles the trigger and graph function with data analyses. Really awesome. Both for fast signals and slow. Thats why I will buy the 34465A soon. I was delighted when I saw that the 65A was coming. but I still will use the K2000 because it's just awesome (mostly UI update speed wise). |
| 6thimage:
--- Quote from: AndyC_772 on March 10, 2015, 09:03:11 pm ---A few years ago, I measured the output of a prototype DC power supply with a cheap Tenma DMM (a tool which, I should add, I used on a daily basis for many years and which was generally both accurate and trustworthy). The reading was a few volts higher than it should have been, and I spent a while probing around the circuit to try and figure out why. It turned out to be noise on the output, which was upsetting the DMM and causing it to misread. Give or take a capacitor or two, the PSU itself was fine. The noise was visible with a scope, but that's less convenient, and not isolated. A 34465A with digitiser could, potentially, have shown not only the correct DC voltage, but also detail of the noise. If I had any other ideas, I'd have the DIG option for my 34465A. --- End quote --- The digitising mode would more than likely have shown the noise, but also the secondary peak measurements would have (and they are not an optional extra). |
| 6thimage:
--- Quote from: Sparky on March 10, 2015, 05:56:05 pm ---Did anyone get the Digitize (DIG) option? I would love to hear what maximum sustained sample rate is possible when simultaneously transferring data to a PC with USB and LAN connections. --- End quote --- The datasheet says that the 34465/70A can do up to 40k readings/s in ASCII to the bus (LAN or USB connected computer). I have also been reliably informed that both LAN and USB have been tested at the maximum 50k readings/s but the data has to be in binary format (configured by the FORMat:DATA SCPI command - page 264 of the manual). |
| Navigation |
| Message Index |
| Next page |
| Previous page |