Products > Test Equipment

Rigol DP832 - Firmware list and bugs

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LaurentR:

--- Quote from: bson on February 27, 2016, 04:50:51 am ---
--- Quote from: LaurentR on February 27, 2016, 03:42:45 am ---I just ran the calibration program on my setup. Looks different, but not better :-)


--- Code: ---Running DAC-V for channel 1
DACV Ch:1 - Step:0 - Nom:0.200000V - DMM:-0.110548V

--- End code ---

--- End quote ---
A negative voltage... How is that even possible?

--- End quote ---

It's always been like that on my DP832. I assume that, just as they go to +32V internally so that they can guarantee that they can do +30V after calibration, they have to go to somewhat negative values to guarantee a good 0.

kazam:
Success!

I just went ahead with the script and then power cycled. All readings are within 1mV.

Attaching the updated Matlab script as well with notes.

/K

kazam:
Looking good!

/K

LaurentR:
Looks great (making me have Keithley envy)!

Note that for the "readings within 1mV", if you do a full sweep, you'll discover the DAC is a bit all over the place in some spots. See this thread for more background:
https://www.eevblog.com/forum/testgear/noob-dac-linearity-in-the-dp832/
So across the sweep, it's actually much closer to the quoted 10mV accuracy.

kazam:
Haha, yes. Great DMM. Highly recommend.

I did a sweep across voltages and attaching the plots. Could be useful for someone I suppose.

I did open it up and soldered a rod across the common terminals of CH2 and CH3 as well. Since I'm working with the unit I might as well do everything properly.

/K


--- Quote from: LaurentR on February 28, 2016, 03:18:51 pm ---Looks great (making me have Keithley envy)!

Note that for the "readings within 1mV", if you do a full sweep, you'll discover the DAC is a bit all over the place in some spots. See this thread for more background:
https://www.eevblog.com/forum/testgear/noob-dac-linearity-in-the-dp832/
So across the sweep, it's actually much closer to the quoted 10mV accuracy.

--- End quote ---

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