coloured BNC test leads

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Jabsam
OneWave
OneWave
Posts: 25
Joined: Wed Mar 09, 2011 1:17 pm

coloured BNC test leads

Post by Jabsam »

Hi friends,

There is one thing I wanna confirm here. As we know, Pico have four coloured BNC test leads, blue,red,green &yellow. I suppose blue used for CHA, red for CHB, green for CHC, yellow for CHD. While we are connecting blue lead to CHA and the fixed ground cable of blue connecting to battery negative, then CHB&CHC&CHD don't need to ground again with their removable ground cables. Am I right?

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Autonerdz
TwoWaves
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Joined: Wed Nov 20, 2002 4:19 pm
Location: Washington State USA

Re: coloured BNC test leads

Post by Autonerdz »

Right. Channels have a common ground.
Tom Roberts
(The Picotologist)
Autonerdz

Lee
TwoWaves
TwoWaves
Posts: 79
Joined: Fri Feb 19, 2010 10:36 am

Re: coloured BNC test leads

Post by Lee »

Just to enhance on Toms answer,

Should you be testing multiple, what are perceived to be 'dirty signals' i.e. MAF, MAP, LAMBDA, Some Pressure Sensors or any other analogue sensor which gives off a lot of noise (where the Filtering, and Analogue to Digital Conversion is done inside the ECU) , you can still add more earths using the detachable ground leads on the other 3 channels to try and improve the signal quality, but i must admit this is a rare occassion that the extra grounds are required so one really does do the job the majority of the time hence the blue lead has the fixed ground.

Kind Regards

Lee :D

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