Keithley 2010 possible problems, error codes and schematic

[charlyd]

hello i bought a keithley 2010 and i am looking for info to fully test and know what possible problems i have to cover to get the unit fully operational.
I found a Schematic from a Keithley 2000 and was wandering if there is something like a schematic for the Keithley 2010 model. I found the service manual with partlist and board layout but no schematic.

can somebody help me out with more info please..

[coromonadalix]

I think someone here or on the web  did a partial reverse schematic (s)

I never saw a full model 2010 schematic

[coromonadalix]

From this thread : https://www.eevblog.com/forum/repair/keithley-2010-low-noise-multimeter-noisy/

https://doc.xdevs.com/docs/Keithley/2010/2010_reversed_partial_sch_and_fw.zip

[charlyd]

does anybody know?  is this K2010 DMM ( and maybe other Keithley in the series  ) Always that nervous in reading out?

[Echo88]

What do you mean with "nervous in reading out"?

[charlyd]

the steps is in MED so i would assume even to the right 4 digit you can read a number but-> NO the right 4 digits are so fast that they show every segment so like 8888...

[picburner]

The instrument, like many others in this category, on the lower ranges (100mV - 10V) has an input impedance >10Gohms.
If you leave the inputs connected to nothing it is normal that the last digits move continuously, the instrument captures any disturbance.
If you try to connect it to a stable source you will see that the reading will be equally stable.

[Kleinstein]

The meters can choose different speeds. So the user can choose between slow accurate readings and fast, but more noisy readings. This can go up to a point of some 1000 updates per seconds and thus to fast for the eye.  In some instruments the setting can survive a power down.

The preferred speed for manual readings is more like 1-5 updates per second ( e.g. 10-50 PLC mode). Than the reading should be reasonable stable on most ranges. The lowest voltage range may still show a little more noise.