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Scope question


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Mr.scotty
Enthusiast


May 15, 2011, 11:41 PM

Post #1 of 9 (1276 views)
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I just bought a handheld one channel lab scope and had a question.

I always see two test probes on scopes ( I'm guessing one is for ground and one is for the signal wire) in all the autotive applications but mine only has one.
Is this a problem or will my scope work the same just not needing a ground?

My question is more pointed at Hammer time cause Tom greenleaf said he would know but anyone can chime in.
I'm new to scopes so any tips or info would be great!

Thanks
--------------------------------------------------------

Your only as good as your tools!


zmame
Veteran / Moderator


Jun 27, 2011, 6:36 PM

Post #2 of 9 (1131 views)
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Just think of it as a positive and negitive on a multi-meter.

like when testing a ABS sensor use your sig lead on + output and COM on the - output of the sensor spin the tire by hand you can watch the scope patter.

you can do some reading on different wave patterns for diaging different things, injectors, coils, crank/cam sensors and etc..

If you can attach a low amp probe you can also do injector performances, fuel pump perfomance/condition and many other things.. that if your scope does amps and has fast enough response time. I use VantagePro scope at work amazing pice of equipment I actually bought my own.


Mr.scotty
Enthusiast


Jun 28, 2011, 12:10 AM

Post #3 of 9 (1127 views)
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Right, but the thing i can't figure out is why my scope only has one test lead.
--------------------------------------------------------

Your only as good as your tools!


zmame
Veteran / Moderator


Jun 28, 2011, 7:29 AM

Post #4 of 9 (1122 views)
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Post your spesific model here ill look it up.


(This post was edited by zmame on Jun 28, 2011, 7:30 AM)


Mr.scotty
Enthusiast


Jun 28, 2011, 1:01 PM

Post #5 of 9 (1115 views)
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It's a velleman instruments model HPS10 personal oscilloscope
--------------------------------------------------------

Your only as good as your tools!


zmame
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Jun 28, 2011, 6:12 PM

Post #6 of 9 (1109 views)
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From what I read in the instruction manual online for that specific model you use the probe on + side,

exsample for wheel speed sensor..

set it to 5v DC
time devision to 30 seconds
probe set at 1x on the + side and tool should have a reading when you spin the wheel.

You may have to calibrate your scope too the process in the your instruction booklet.


Mr.scotty
Enthusiast


Jun 28, 2011, 11:20 PM

Post #7 of 9 (1105 views)
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Ok, Do i use it on signal wires if the part has one (like a crank sensor)?
--------------------------------------------------------

Your only as good as your tools!


zmame
Veteran / Moderator


Jun 29, 2011, 7:31 AM

Post #8 of 9 (1099 views)
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on + side (signal side).


Mr.scotty
Enthusiast


Jun 29, 2011, 11:11 PM

Post #9 of 9 (1089 views)
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Got ya, Thanks again!
--------------------------------------------------------

Your only as good as your tools!




Scope question


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