I'm considering buying the DMM6500.
What I like about the unit is the data acquisition possibilities. But after reading through this whole thread I also saw some issues that where pointed out.
The issue that a current trough the current measurement path interferes with the voltage measurement is a bit of a set back.
Also it seems that the technical person of Keithley doesn't interact on this thread anymore, that is a bit unfortunate.
Also In the datasheet I've read it has a fixed forced cooling, however in a video comparing the fan sounds to another device, I can hear it changing. Also in this thread 2 speeds are mentioned.
So what to expect regarding fan noise.
When I write scripts for my other devices, I mostly do that remotely anyways, but in other usages not having a lot of fan noise would be a plus.
I know every case has its best matching device, but as this being a hobby, in my situation it's sometimes otherwise. The case is then matching the device possibilities. Using and exploring gear is a large part of the hobby.
So for me the question would be: is the device fun to use (not to many crashes/bugs, fan noise) and is it accurate enough to make the efforts using it in experiments worthwhile, and also has it also matured enough in its current FW state?
(About the accuracy: I think it should be more than enough.)