Oscilloscope Connections.

[jethro99]

Got a new oscilloscope to play with. 126 page user manual but with no advice as to how to properly connect the test probes.
Would someone take a look at the illustrations below and let me know if I am thinking correctly? It would be appreciated.
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[IRstuff]

Oscilloscope ground should NEVER be connected to anything except a ground. I nearly got got hit by a chunk of an exploding IC when I connected an oscilloscope ground to chassis, which I naively assumed was ground; it was not and it was actually hot.

TTFN (ta ta for now)
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[zeusfaber]

Agree with IRStuff. A safer approach to taking the measurement you want in your second example would be to take a ground from the vehicle, then use two separate probes on the stator outputs and set the scope to display the difference between the two channels.

A.

 

[IRstuff]

An oscilloscope with two inputs will typically have a Ch2-Ch1 function to get differential measurements without compromising the ground.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

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