probe is decompensated - Page 1
Forum section: electronics / beginners

author: Adrian_Arg.
author_rank: Frequent Contributor
timestamp: April 08, 2018, 10:57:18 pm
content: I have a Rigol DS1054z, when I turn it on, for a few minutes the probe is decompensated, and then it automatically corrects itself until it is perfect.Is this behavior normal?

author: Adrian_Arg.
author_rank: Frequent Contributor
timestamp: April 09, 2018, 12:31:15 am
content: Does anyone else happen to him?

author: RoGeorge
author_rank: Super Contributor
timestamp: April 09, 2018, 12:57:58 am
content: My DS1054Z shows perfectly square waveforms from the first moments after booting, and does not need to adjust probe compensation during work. In fact, I adjusted the probes only once, when I bought the scope, about 3 years ago.Does this happens to all probes? Does it happens to all channels? How did you test it, and how much are the corners rounded?Some screen pictures will be very helpful to identify what is happening.What do you mean by "probe is decompensated"?

author: Adrian_Arg.
author_rank: Frequent Contributor
timestamp: April 09, 2018, 03:59:19 am
content: If I can explain to you, because my English is bad, when I start it in the morning I put a probe in the Probe Compensation Signal Output Terminal / Ground Terminal, it appears unbalanced, but after two minutes they are perfectly compensated, but if I turn off for many hours, plus or minus 8 hours, it goes back to a lesser extent but it happens.channel 1 is that more decompensation.compared to another Tektronix TDS2022C oscilloscope once it fits works perfectly, it's those initial 2 minutes.

author: RobertHolcombe
author_rank: Frequent Contributor
timestamp: April 09, 2018, 05:09:13 am
content: Sounds like the input impedance of channel 1 is drifting? (not totally clear on if it only affects one channel, or all). If its affecting more than one channel then I'd be investigating power supply, else I'd look at the channel 1 front end for cold/cracked solder joints as the fault rectifies itself as the board warms up. I'm not familiar with the construction of the 1054Z so not sure how involved it would be to disassemble for inspection of the front end.

author: Adrian_Arg.
author_rank: Frequent Contributor
timestamp: April 09, 2018, 11:57:33 am
content: I upload some images, It took me 3 minutes to compensate

author: ogden
author_rank: Super Contributor
timestamp: April 09, 2018, 12:13:52 pm
content: Quote from: Adrian_Arg. on April 09, 2018, 03:59:19 amSorry to repeat - did you test other channels of particular scope? Same problem? Did you test other probes of particular scope?

author: Adrian_Arg.
author_rank: Frequent Contributor
timestamp: April 09, 2018, 12:29:10 pm
content: channel 1 and channel 4 is where it manifests itself, channel 3 half of channel 1 and channel 2 very little.

author: RoGeorge
author_rank: Super Contributor
timestamp: April 09, 2018, 12:30:12 pm
content: Not normal. I don't have this problem with my DS1054Z. All 4 channels are perfect from the first moment.

author: StillTrying
author_rank: Super Contributor
timestamp: April 09, 2018, 12:56:13 pm
content: I think it's normal.There's good reasons why probe compensation and self-calibration should be done after 20-30 minutes warm up, and not in the first 3 minutes after switch on.

author: Nitrousoxide
author_rank: Regular Contributor
timestamp: April 09, 2018, 01:18:11 pm
content: For sure an issue with the scope, that has never happened to my DS1054Z.A functioning passive probe shouldn't un-compensate itself.

author: Adrian_Arg.
author_rank: Frequent Contributor
timestamp: April 09, 2018, 01:50:50 pm
content: ok, the problem is right when it gets cold, for more than this guarantee, it will cost me cheaper to take it to be reviewed in Concordia, Argentina, than send it to tequipament, they tell me to call rigol and the people of rigol they tell me to call tequipament.yo I thought that tequipament or rigol, I was going to suggest that they revise some component or they were going to send me the schematic diagram of it.