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  #1  
Old 04-22-2012, 11:30 PM
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Can someone teach me about oscilloscopes?

I see them advertized used for next to nothing and i Know that they can be used to diagnose ignition problems. Do these scopes need to be set up for automotive use or can any scope work?

How do you use them?


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  #2  
Old 04-22-2012, 11:39 PM
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Easy! You blow the resistor to ground and it quits working. Happens every time.
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  #3  
Old 04-23-2012, 12:58 AM
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If you want to look at the actual high voltage output I'd think you would need a special scope... or at least a special probe.

I've used mine when working on the car... very handy!



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  #4  
Old 04-23-2012, 05:59 PM
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Al.....

Today is 23-Apr-2012. If you visit a site called shopgoodwill.com - Welcome and search for Heath you will find that they are offering an old Heathkit ignition analyzer. This is a scope that is built for car ignitions and it will really tell you where your problems are.

This is an auction site and you don't really know if the thing works, but you can sometimes pick up some really good stuff there cheap.

Good Luck!
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  #5  
Old 04-25-2012, 02:48 PM
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Originally Posted by Pooka View Post
Al.....

Today is 23-Apr-2012. If you visit a site called and search for Heath you will find that they are offering an old Heathkit ignition analyzer. This is a scope that is built for car ignitions and it will really tell you where your problems are.

This is an auction site and you don't really know if the thing works, but you can sometimes pick up some really good stuff there cheap.

Good Luck!
I'm totally agree with you man.You'r 100% good here.I have entered this site and find some interesting information there...this a very useful link that will be referenced long into the future.Thanks for sharing this.
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  #6  
Old 04-23-2012, 06:55 PM
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Then replace the RC circuit to ground. If it's used, it's blown.
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  #7  
Old 04-23-2012, 07:31 PM
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How do they work on my diesels?
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Old 04-23-2012, 08:58 PM
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How do they work on my diesels?
Flawlessly. Even the broken ones.
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  #9  
Old 04-24-2012, 07:33 AM
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Flawlessly. Even the broken ones.
They would give about the same indications, wouldn't they.
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  #10  
Old 04-24-2012, 01:24 PM
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They would give about the same indications, wouldn't they.
Uh-huh. Neat thing about a single-point. Everything gets the same answer. Not unlike political party fanatics.
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  #11  
Old 04-24-2012, 02:23 PM
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Uh-huh. Neat thing about a single-point. Everything gets the same answer. Not unlike political party fanatics.
An oscilloscope with a high enough frequency might be able to track Gov. Romney's changes in position about political issues.
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  #12  
Old 04-23-2012, 07:33 PM
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Thanks I'll take a look! I don't think that they work on diesel as they are used to diagnose ignition problems. But that said, I could be completely wrong.
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  #13  
Old 04-24-2012, 09:05 AM
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Originally Posted by alabbasi View Post
I don't think that they work on diesel as they are used to diagnose ignition problems. But that said, I could be completely wrong.
Well, you might be able to use it to:

1. Check the injection timing signal on an OM603. This would probably take more work than it is worth, particularly to get the required TDC reference, but theoretically ...

2. Check voltage waveform to tell you if the rectifier bridge has one or more 'open' diodes, giving weak performance without shorting out the battery.

3. Using a long, slow trace, and with enough screen persistence, you could check the duty cycle of the heater's monovalve.

I'm just sayin'.

It can also make a cool workbench display
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  #14  
Old 04-23-2012, 09:35 PM
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I've used them when doing fine grinding of inside diameters on jig grinders. It shows when the wheel is cutting or not.

I've never used one on a car...
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  #15  
Old 04-24-2012, 09:23 AM
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You can also use it to check ABS sensors. That's what I was doing in the picture I posted. Made an annoying job easy.



vs.

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2014 Cadillac ELR
2013 Fiat 500E.
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