Products > Test Equipment

Rigol DP832 - Firmware list and bugs

<< < (136/153) > >>

skander36:

--- Quote from: garrettm on March 16, 2020, 09:46:27 pm ---Good to hear everyone got their units calibrated using the Python script. I'd like to apologize for the hassle everyone has experienced. The DMM4050 must use a different method to read the output buffer than these other DMMs. I might take my code down since very few people know Java. The only code that really needs to be adjusted are the DMM methods. As everyone has seen, Telnet cal involves much less mucking about but the SCPI commands are completely different between DMMs. If I do keep the script on the forum, I'll probably add a test class for people to get readback working first before running the script.

Again sorry for the trouble everyone has had with the script. It works great with my setup and really shouldn't be hard to figure out, but then again I wrote it. So yeah, my bad.

--- End quote ---
GarrettM , as long as your code do the job with your DMM you are ok.
I was testing on my own with a different DMM so I asume fail.
As I said before your code is unique in that it does not require any setup . Just compile.bat and run.bat The others scripts need Python setup which is a mess with PY-Charm , or MatLab installed .
So if you can put a on/off switch to del/write values in PSU for testing/debug you are ok !
P.S. My unit was first calibrated with MatLab LaurentR script , then  wanted to gave Siglent owners an alternative method I gave Python a second chance.

JDubU:

--- Quote from: skander36 on March 16, 2020, 10:09:03 pm ---
Also someone know how calibration values was obtained and from where ? Because on channel 2 lower voltages are negative until 40 mV . Only manual calibration of the DAC V on channel 2 manage to calibrate at a 1.5 mV for 1mV value . Above 100mV precission is equal on 3 decimals .

Thank you .

--- End quote ---

I didn't write the Python calibration script. 
Here is a link to its GitHub page which also describes some of its history:
https://github.com/stupid-beard/dp832cal

The calibration values came from EEVBlog member TooOldForThis:
https://www.eevblog.com/forum/testgear/rigol-dp832-firmware-updates-and-bug-list/msg556101/#msg556101

skander36:
I know about them but I want to know how they was obtained.
Can you check on your PSU if on CH2 range 0-40mV is ok ?

Thank you very much !

JDubU:
No idea how TooOldForThis came up with those calibration points.

Just checked my DP832 and channel 2 is currently reading approximately 1.5mV low at 0V setting. 

Set at 0V, measures -1.5mV
Set at 1mV, measures 0.9982mV
Set at 40mV, measures 38.2mV
Set at 0.5V, measures 0.4991V
Set at 1V, measures 0.9982V
Set at 10V, measures 9.9995V
Set at 20V, measures 20.0004V
Set at 30V, measures 29.9998V

I have not done a calibration on it for at least a year.  Maybe it's time.

JDubU:
Just checked channel one.

Set at 0V, measures -0.3mV
Set at 1mV, measures 0.73mV
Set at 40mV, measures 39.7mV

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod