Hi,
I tested two 34465a measuring instruments , one of my own and a loaner instrument.
Mine measuring instrument in sent to the other side of the world, to the Factory in Malaysia, because i had problems with the autocal function.
The autocal function of the 34465a is a joke, don't buy a 34465a just because you need this function.
When you do an autocal, if the temperature remains the same, the correction that is done after performing the autocal function, disappears again after 10 to 20 minutes...
I have done extensive measurements on this problem and have many pictures of it.
The factory in Malaysia has also found this behavior and dismisses it with "this falls within the drift that may occur within 1 day...
The loaner instrument was so stable that the autocal function was not needed at all and only made it worse.
Unfortunately my instrument was not as stable but well within specifications.
I no longer use the autocal and calculate the drift from the internal temperature when making precision measurements.
The service from Keysight Netherland was very good, they were very helpful.
The additional functions that the 34465a has such as for the temperature sensors and averaging the measured value are one of the functions that I use regularly.
I hope this helps.
Kind regards,
Bram