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Keithley DMM7510, SMU 2450 & 2460 problems

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Kleinstein:
Besides drift the auto-zero function also suppresses 1/f noise of the ADC and input amplifier (the part included in AZ function).
For some reason this does not work well with the DMM7510 until some 0.02 Hz.  Especially with a higher grade DMM were the ADC is not adding much white noise this giving away some possible performance.  For many applications it is not a problem,  more like a negative surprise as the performance to something like 100 PLC or with external averaging is way lower than what is expected from the 5 PLC specs. Its kind of the step from barely 7.5 digit resolution to nearly 8 digits that is given away due to some odd software.

I don't have much hope to get it fixed with the DMM6500 - the problem is more like some old tradition carried on for to long and not need to change this for 6 digit performance.  I have more hope if they want to bring out an 8 digit version that they might realize it would help to suppress 1/f noise.

PA4TIM:
new 7510 , first hour of use a BSD.
Firmware rev 01.06.4C,
faultcode: PC=0012D6F8

I was in the continuity function, pressed MENU and the screen got blue.

OT: Great meter, I really like it. For me the speed, the sampling part (even better as I hoped), the dry circuit ohms, the nOhm-Gohm , pA resolution and the easy user interface are the winners but I do not know if I like the continuity and diode functions.
2 functions that are very important for me.  (I really like the continuity from my 2000)
Continuity is fast enough but it latches much to long and the beep sounds like a mix of bird with a cold and a choked mouse.
Diode test has two levels and a beep (the same choked mouse), what is great on its own but not for my use. (component level repair work) My Agilent beeps once for a diode and stays beeping on a short so I do not have to look to the screen. The 14V is also great but not always for use in situ.

PA4TIM:
Today the continuity stalled the meter. I changed the limit to 1.5V . I could change to the function screen but when I pressed another function the round in progress thingy showed up and stayed. I had to re-power it.

I still like the meter, it is so comfortable in use. I normally have a handful of meters powered up so I do not need to switch functions, but it is a bit sick a meter in this class after 3 years still has bugs. My Siglent scopemeter has some too but not in a way it stalls and need a repower cycle (and is probably the cheapest isolated scopemeter on the market)

maxwell3e10:
Yes, I have seen it hang up with various less frequently used features, like temperature in my case. I think they managed to get the bugs out for the most common voltage and current measurements, but other may still not be tested thoroughly. There is a Tek forum devoted to this topic: https://forum.tek.com/viewforum.php?f=363
If you post there, they will try to reproduce the problem and maybe it will get fixed in the next FW update. Not sure why we have to do their work for them, though.

MegaVolt:
Firmware rev 01.06.4C

I got a freezing part of the interface working only with a touchscreen.

https://youtu.be/Rvf8-_G8208

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