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How to check a 230VAC sine/modified wave with an oscilloscope (FNIRISI 1013D)
joeqsmith:
--- Quote from: juan3211 on March 21, 2023, 12:31:27 pm ---...
Now I know that these two YouTubers how review the 1013D don't know a lot about it or about electronics in general.
...
--- End quote ---
Rather than place the blame on the YouTubers, maybe consider the SISO factor (Shit In = Shit Out). Asking better questions may yield better results.
--- Quote ---DDS (DIY Domótica Solar) 21 hours ago
@joe smith hi , in order to measure a 50-60hz sine wave to check some inverters, main grid,... modified or pure sine, armonics, .... Is it good to use a step down transformer ? For example, from 240vac to 24vac. Or it (transformer) will distrub, smooth, .... signal ?
joe smith13 hours ago
@DDS (DIY Domótica Solar) It depends what you are after. Anything you use will cause some error. Not all transformers will have the same response. Of course, you don't want to apply any DC to a transformer. Following videos show a simple transformer / LEM used to measure AC power with my scope.
--- End quote ---
tggzzz:
--- Quote from: joeqsmith on March 21, 2023, 01:16:18 pm ---Asking better questions may yield better results.
--- End quote ---
Just so.
General truism: it is easy to answer a question correctly, but it is more difficult to know the correct question to ask.
JeremyC:
--- Quote from: juan3211 on March 21, 2023, 12:31:27 pm ---I want to test several inverters and signals. All 230VAC RMS.
My goal is to check if it is pure sine or not, and this is very easy.
But also, I am asking myself if there are also differences among pure sine waves , and among modified sine waves.
--- End quote ---
juan3211, keep in mind that 230V RMS = 650Vpp. You should buy a high voltage differential probe like the Miscig DP10013.
Sample link: https://www.amazon.com/Micsig-DP10013-Differential-Attenuation-Tektronix/dp/B074K4XPW3
shapirus:
--- Quote from: JeremyC on March 21, 2023, 03:02:50 pm ---high voltage differential probe
--- End quote ---
High voltage yes, but it doesn't have to be differential. Inverters are floating, because they are battery-powered. They don't have any connection to ground.
JeremyC:
--- Quote from: shapirus on March 21, 2023, 03:20:22 pm ---
--- Quote from: JeremyC on March 21, 2023, 03:02:50 pm ---high voltage differential probe
--- End quote ---
High voltage yes, but it doesn't have to be differential. Inverters are floating, because they are battery-powered. They don't have any connection to ground.
--- End quote ---
OP mentioned that he may need to check mains in his house
--- Quote ---So if I want to check my home circuit (ground +neutral+phase, generally neutral is connected to ground in grid's substation) how do I need to connect transformer secondary outputs ? What is the correct option?
--- End quote ---
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