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Which is cylinder #1?

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Which is cylinder #1?

Postby nickyy » Fri Mar 21, 2014 9:52 pm

Simply question, as I assume this has been asked many times before, but I just can't find the answer.

Equipment: Pico 4423 w/Mixmaster.

I have a parade of secondary ignition waveforms parading on my screen. I would like to determine which one is which, i.e. #1, #2, etc.

How do I do this?

Thanks
-Nick
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Re: Which is cylinder #1?

Postby Martyn » Fri Mar 21, 2014 10:01 pm

You can find our specialist automotive forum here

http://www.picoauto.com/support/
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Re: Which is cylinder #1?

Postby nickyy » Mon Mar 24, 2014 5:39 pm

What does this mean???
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Re: Which is cylinder #1?

Postby richard_boyd » Mon Mar 24, 2014 9:48 pm

Hello Nick,

What Martyn was saying is that we have a automotive dedicated forum on http://www.picoauto.com/support/ that you can ask automotive related questions, whereas www.picotech.com is aimed more at our T&M customers.

That said, in order to stabilize and identify each cylinder you need to enable a trigger, and then trigger on cylinder #1. You can do this by connecting the trigger out from the Mixmaster (far left BNC on the bottom row of the Mixmaster) to a channel on the 4423 and then in the software changing the trigger settings from None to the channel you connected the trigger out to. You will have to play with the trigger threshold some, depending on the output of the coils.

Now you should have a steady signal on the screen. The yellow diamond on the screen indicates the trigger point, and also #1 cylinder. You can click and drag this point on the screen to move the signal left or right. Now that you know this is # 1, you can use the firing order and go right to determine the other cylinders (so on a Chevy 350 the ignition event to the right would be #8 since the firing order is 18436572).

You can find the user manual for the Mixmaster online at: http://www.picotech.com/document/pdf/mi ... efie-3.pdf and for PicoScope 6 at: http://www.picotech.com/document/pdf/psw6.en-33.pdf and a quick start guide at: http://www.picotech.com/document/pdf/ps6tm-1.pdf

Let me know if you have any questions. Thanks for your time Nick and have a great day!

Regards,

Richard Boyd
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Re: Which is cylinder #1?

Postby Martyn » Tue Mar 25, 2014 7:20 am

What does this mean???

This did confuse me, you had already posted a question on the auto forum and received a reply

http://www.picoauto.com/support/topic9999.html#p30661

if you are unsure what the reply means please ask on the auto forum for clarification
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Re: Which is cylinder #1?

Postby nickyy » Tue Mar 25, 2014 8:31 pm

Richard,

Thanks so much for your clarifying response and for your patience with me during my days as a scope novice.

-Nick
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Re: Which is cylinder #1?

Postby nickyy » Mon May 12, 2014 10:44 pm

Steve,
With your help I have understood what was going on. I now see which one is #1 because, indeed, the grayed-out diamond designates the starting firing order.

Thanks,
Nick
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