I'm fortunate enough to be working in an engineering research group that is looking to buy a 8.5 digit meter. I was hoping I could ask for advice on what to buy. I'm sure I'd be happy with any of them, but want to be sure. I love the form factor of the 2002, hear the linearity of the 3458a is unmatched (plus it is "the one to have"), however I really appreciate the modern interface on my Keithley equipment and the 8588a is the only one that comes close.
Now, about the use case:
We have a range of devices (DMM/SMU) we use in physical measurement, including DMM7510, several DMM6500, 2450, 2461 etc. We build devices to measure things like thermal conductivity, so we measure transient pulses through platinum wires. I lead the group, but also have a side hobby in volt/time nuttery. I've repaired some old Fluke DCV/I calibrators, but also have a Datron 4708, fully optioned, waiting for repair.
My plan was to get the 8.5 digit DMM annually calibrated, use it to verify the 4708 performance, then calibrate everything else as/when needed from there. I do not need professional certification of calibration for any legal/business reason, I just need to believe in my equipment for my research.
What would you choose and why? Thanks in advance for your help.