Bolloxed up my DP811 calibration. Now unbolloxed. Re bolloxed. - Page 1
Forum section: electronics / testgear

author: purpose
author_rank: Frequent Contributor
timestamp: July 08, 2019, 03:29:11 pm
content: Evening all,I was fiddling with my DP811 after one too many and have somehow managed to lose output when attempting manual calibration.I'm pretty sure I cleared the cal (only the whisky knows why) and now I have nothing to measure.Output when not in cal mode works, but is all over the shop.Any DP gurus to steer me in the right direction?Yours in hope.Peter

author: thm_w
author_rank: Super Contributor
timestamp: July 08, 2019, 08:50:53 pm
content: Did you reset the power supply already and issue is was same?If so whats stopping you from running through all the manual cal. Do you have the proper equipment to do all the calibration steps?

author: purpose
author_rank: Frequent Contributor
timestamp: July 08, 2019, 09:35:32 pm
content: When you say reset, do you mean a hard reset back to factory defaults?If so, no. Didn't know there was one.Running the manual cal is devoid of any output, on any of the cal points, so I can't measure anything.Proper equipment is a Keithley 2015.

author: thm_w
author_rank: Super Contributor
timestamp: July 08, 2019, 09:49:13 pm
content: Quote from: purpose on July 08, 2019, 09:35:32 pmBy reset I just meant power on/off the supply.OK that is very odd if you are not getting any output at all. I wouldn't think the state of the CAL data would matter.. especially since you are still getting some voltage in regular mode (so shouldn't be a blown fuse).

author: purpose
author_rank: Frequent Contributor
timestamp: July 08, 2019, 09:51:22 pm
content: Very odd indeed. I think I need another drink.

author: Pinkus
author_rank: Frequent Contributor
timestamp: July 08, 2019, 09:51:45 pm
content: I recently lost the calibration of my DP832 during a firmware update.I then started manual calibration, but I quickly recognized, that it would take a few hours as there are a lot of calibration points.There are a few (99% identical) Python calibration scripts out here, which you can use with a SCPI DMM.For the start - here is one link (there are more):https://www.eevblog.com/forum/testgear/rigol-dp831dp831a-calibration-script-using-dm3086-calibration-script/msg980507/#msg980507Then, the calibration will take a hour but will run almost automatically (you will have to switch the DMM cable connection for calibrating the current though).Good luck!P.S. I almost forgot: If you own only a DP811, you will need to hack your device first to a DP811A to make the LAN port working. Just search for hacking a DP832 ....P.P.S. Manual calibration did not give me any output first too and I still do not know why. Scripted calibration did work.

author: purpose
author_rank: Frequent Contributor
timestamp: July 08, 2019, 10:01:49 pm
content: Ah yes... python in my future... I was hoping to avoid that, but may have to dive in.Already upgraded to A, which is when I noticed the voltages were off and why I thought a calibration would be in order.Ta.

author: purpose
author_rank: Frequent Contributor
timestamp: July 10, 2019, 03:21:12 pm
content: Now unbolloxed.Read a bit of material, then fudged my way through.Loaded in all new calibration points over Lan and then manually calibrated.Off to wrap my aching neck in alcohol.Ta

author: purpose
author_rank: Frequent Contributor
timestamp: July 13, 2019, 11:30:50 am
content: Afternoon all.I seem to lose the calibration after saving and switching off the unit.I think it might be something to do with the Cal Time not being set.Any ideas how to set it?CheersPeter

author: tv84
author_rank: Super Contributor
timestamp: July 13, 2019, 02:39:01 pm
content: Maybe you should set the time prior to cal and then do the cal.

author: purpose
author_rank: Frequent Contributor
timestamp: July 13, 2019, 02:58:24 pm
content: Setting the time would be my objective. Do you know how it's done?

author: tv84
author_rank: Super Contributor
timestamp: July 13, 2019, 03:09:17 pm
content: SCPI commandhttps://www.eevblog.com/forum/testgear/lists-of-rigol-scpi-commands/msg2460030/#msg2460030

author: JDubU
author_rank: Frequent Contributor
timestamp: July 13, 2019, 03:20:15 pm
content: Quote from: purpose on July 13, 2019, 11:30:50 amAttached PDF might help:

author: purpose
author_rank: Frequent Contributor
timestamp: July 13, 2019, 03:31:50 pm
content: JDubU... You're a demi god and macho man.... may you live for a thousand years.There it was... :CALibration:End 12/31/2014,CH1 Date format MO/DY/YEARCheers