Video: Picoscope Custom Probes — Relative Compression Test and Analysis with a Current Probe

Scott Manager California Posted   Latest   Edited  
Demonstration
Pico Technology
Education
Current Probe
Scope Trigger
Cranking
Compression Test

Matt Fanslow walks us through the custom probe set up operation within the Picoscope Automotive Software. We also perform a relative, cranking compression test with a current probe utilizing the single trigger function followed by waveform analysis discussion.

This is the second video of this series Diagnostic Network recently recorded with Mr. Fanslow covering Picoscope operation.

The first video released from this series is located here:

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Anthony Technical Support Specialist
Pennsylvania
Anthony Default
 

Hi Scott: When Matt was at our office a few years ago, he went over Custom Probes and some other items. I wished it was recorded. Now, it is. Thanks, for sharing. Guido

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Enrico Apprentice
Quebec
Enrico Default
 

Thank you for the information. It is much appreciated guys.

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Tyler Technician
Kansas
Tyler Default
 

Scott, that's a Fluke Y8100 current probe being used, correct? I ask because it appears that the opening in the jaws is larger than a typical low amp probe, which got my attention. Worth trying to find one used?

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Scott Manager
California
Scott Default
 

Hi Tyler, Yes that's the probe and this one is 25+ years old and still works great!

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Allan Instructor
Manitoba
Allan Default
   

Hi Scott, great video, thanks to you and Matt for doing it. Just wanted to say it wouldn't open on Internet Explorer. I got a message "no compatible source was found for this media" but it plays fine when I switch to Chrome. Not a big deal but in case someone else has the same problem. Or maybe it's just something on my end. The relative compression test with in-cylinder pressure transducer

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Scott Manager
California
Scott Default
 

Hi Allan, Can you provide me with the version of IE you're running? It's very possible that Chrome is more current than your version of IE. Yeah Matt did a great job and we have a few more videos coming! Thanks for the editing comment, it works like you would expect! ;)

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Allan Instructor
Manitoba
Allan Default
 

Hi Scott, thanks for the reply. Yeah I'm using an older version of IE …, it's on my laptop that I use for mobile calls. It does what I need it to do and if it doesn't I can switch to Chrome.

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Brin Diagnostician
Florida
Brin Default
 

This was a fantastic video guys. I love the explanation for why there's more starter effort on the first good cylinder following a weak contributing cylinder. I believe Matt referred to it as an air spring effect. Thanks guys!

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Bob Owner/Technician
Massachusetts
Bob Default
 

I agree Brin. I always attributed the higher current after a low cylinder to increased crank speed but the way Matt explained it makes a lot of sense.

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