+- Blitzortung.org Forum (https://forum.blitzortung.org)
+-- Forum: Public Forums (https://forum.blitzortung.org/forumdisplay.php?fid=29)
+--- Forum: Hardware, Software, Lightning Physics (https://forum.blitzortung.org/forumdisplay.php?fid=30)
+--- Thread: Offset adjustment (/showthread.php?tid=2199)
Offset adjustment - radiofarol - 2017-06-11
Does someone tell me why the system graphic of my detector show always a offset of + 50/60mV from zero? Can I adjust this anywhere? In the web interface, a can`t find any adjustment for this! It`s seem any wrong value in the ADC.
- Sampling per InputResolution: 12bits, Period: 666ns = 500.0kSPS, Time: 2000ns
- ADC1
- Input1 Amp-Channel 3 , Offset 26mV, no Trigger
- Input2 Amp-Channel 4 , Offset 30mV, Trigger -90mV/90mV
- Input1 Amp-Channel 3 , Offset 26mV, no Trigger
- ADC2
- Input1 Amp-Channel 2 , Offset 30mV, Trigger -95mV/95mV
- Input2 Amp-Channel 3 , Offset 25mV, no Trigger
- Input1 Amp-Channel 2 , Offset 30mV, Trigger -95mV/95mV
- ADC3
- Input1 Amp-Channel 1 , Offset 39mV, Trigger -95mV/95mV
- Input2 Amp-Channel 2 , Offset -151mV, no Trigger
- Input1 Amp-Channel 1 , Offset 39mV, Trigger -95mV/95mV
- Thanks for your help!
ST ID 1846
RE: Offset adjustment - kevinmcc - 2017-06-12
That is normal.
There is a slight DC component that causes the offset.
Not adjustment is needed, and why there is no option.
RE: Offset adjustment - radiofarol - 2017-06-12
Tanks a lot lot Kevin for your reply. I understanding that is a sliht DC component. I was a bit worried that this offset would change the results of the system, but if Kevin says it's normal, I'll be calmer. Thanks again!
Best 73 Carlos CT4RK
STID 1846
RE: Offset adjustment - DanielVe - 2017-07-24
Hello,
When I started my station I noticed the same issue.
Finally I cleaned all PCB with Kontakt WL product and all DC components have disappeared.
Best regards
Daniel / ON4LDZ
RE: Offset adjustment - allsorts - 2017-07-25
Oooo, that's interesting. Now what is "Kontakt WL"? A residue free, volatile, cleaner. Finds the safety data sheet, mostly isopropanol (propan-2-ol, isopropyl alcohol) with a dash of light petroleum (Naptha, lighter fluid). Have both of those lying about... Did you just clean a few selected areas or give the whole board, both sides, a good squirting with Kontackt WL?