Reactive power - Reactive Generator research from GotoLuc - discussion thread

[gotoluc]

Channel Settings:
- Termination = 1M
- Offset: 0.0V, 0.0A
- Leave the vertical scaling to default for now.

Acquire Menu:
- Record Length = 10k

Okay but all the above I don't see in menus?

Also, I think I see a problem. I tested with my 10 Ohm 1% at 10vac which should = 10 Watts and should be identical when I select Invert but see scope shots below. I added  Math Max and Min to see what's going on.

I did the scope auto calibrations with probe removed and it's clear the Math has an offset. Can this be adjusted?

Also, I have found that when I use Fine for vertical scaling and adjust each channel to fill the scope window the most that the readings are more accurate then using coarse setting and having two different size wave forms. I mostly see a difference if I make the Math as large as possible to fit the window. Try it, you should see a small change numbers.

I agree with you that it is better to check more sample to be sure the numbers are accurate or stay the same.

Luc

[poynt99]

Luc,

You only have about 6 MATH cycles there. Can you increase the number of cycles and see if there is better correlation between inverted and non-inverted?

Regarding those settings that you can't find, I'll check the manual tomorrow (Tue) and find them for you. They should be there somewhere.

[gotoluc]

Okay, here you go.

I'm done for the night

Luc

[tinman]

@ Poynt

The only way i can select the math as the source,is in the cursor menu. The shots below are set up as this-ch1 x ch2. DC coupling.Voltage probe(yellow trace)set at 10x,and current probe(blue trace) set at 1x,across a .1 ohm 5 watt resistor.I just cant seem to get it to come up like Luc's shows,with it in the menu bar down the right side-math that is.All i can get is the little box of numbers in top left corner.

[tinman]

I can also get all this junk(below),but only on ch1 and ch2,not math.
As you can see,i realy know my way around a scope.