Electronics > Beginners

My First Fluke: The 87V Crash Course

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jedidove:
I agree that the display hold is a bit pointless. I think I'll get much more use out of AutoHOLD and I'm sure it will replace all the functionality that I would have gotten out of display hold. I was a little baffled at first mainly because of the two separate icons described in the manual but I guess they are there just to accomodate for the behavior in min max avg mode.

Thanks for the clarification of the frequency function in AC vs DC. I probably wasn't entirely focused when I skimmed that section of the manual. I kinda wish they included the full manual instead of the quick start guide in a million different languages.

On a related note. How does the duty cycle measurement vary between AC and DC modes? Moreover, I know you can select + and - triggers for duty cycle (and frequency) but does that trigger somewhere on the + and - slopes or does it trigger only when it crosses the 0V line? i.e. if I had a TTL pulse train would + and - give me the two complementary widths? or would that only work if I had a pulse train that dropped below 0V?

I didn't know that about averaging in cheap meters. That makes much more sense.

The non-continuous peak idea seems valid since it wouldn't make sense otherwise why they don't include avg and why there is such a huge difference between the two rates (100ms and 250┬Ás). I took another look at some data I grabbed from the function generator in class and the "crest ratio" came out to be like 1.43, so it erred on the OTHER side of the ?2 value so I feel more confident that the peak function is working the way I hoped. I'm going to do some more testing when I get the chance. @Alm can you clarify what sort of testing you had in mind when you were talking about the sampling rates?

Has anyone used the smoothing feature in any practical situation?

EDIT: I just realized that for some reason when I post the sqrt character it comes out as ? so sorry for any confusion that may have caused.

Kiriakos-GR:

--- Quote from: jedidove on February 06, 2011, 10:37:15 pm ---
Has anyone used the smoothing feature in any practical situation?


--- End quote ---

You had just gave to me an idea , about an voting , about its functionality , like , how much we use it.  :)
Or how useful we find it from 1-10 .

But the forum code does not help for such complicate voting .
Like, many options, and scaling about its one .

tyblu:
Holy crap this is long. Will wait for abridged version to come out -- possibly feature film.

Kiriakos-GR:

--- Quote from: tyblu on February 07, 2011, 12:56:39 am ---Holy crap this is long. Will wait for abridged version to come out -- possibly feature film.

--- End quote ---

There is an good explanation for it ..

Few years back FLUKE was supplying the big fat "User manuals" , with lots of info.
Today it gives 10 pages the most , and you have to become an private investigator,
so to get at the bottom of all the details.

But I will agree that jedidove  , does not do savings about using words .  ;D


Even Dave had notice that Fluke had start to cut corners on the size of the manuals.  
  
The FLUKE 8050 an simple DMM , with one "User manual" six times the size of what you get with 87V or 28II .

jedidove:

--- Quote from: tyblu on February 07, 2011, 12:56:39 am ---Holy crap this is long. Will wait for abridged version to come out -- possibly feature film.

--- End quote ---

LOL...Don't worry, I'm currently shopping a script and I think I may have Steven Spielberg interested.


When I get a chance to sit down in the lab for awhile I'll test what I can and make a (hopefully much shorter) post here summarizing the results and open questions.

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