Hi my name is Phil Rutt from Pico Technology
Today we are going to be using the PicoScope with or standard coloured leads
And we are going to do a test on the O2 sensor
We will show you how to connected
How to set the screen up on a manual setting
And how when we change the earthing points that can change how good our signal is
We also have the feature on filtering where we can go to active filtering and filter things
We are going to show you how to carry the test out
How to record the notes
And how by changing the earthing points it will effect the signal
So what we have done on the screen
We have gone to 2 Volts and gone to 10seconds
The reason for going for 2 Volts is the fact that sometimes we get lots of interference
So we get our over voltage reading on the screen a little red mark that comes up at the top
We will start the car up
Start the software up and rev the car up
You can see the oxygen sensor is switching
You can see that every so often it goes over voltage due to interference
So I will show you how by changing the earthing points it will effect the signal
We will take it off the engine and put it onto the battery
And we can see how our signal has changed
We have a very wide signal with lots of interference
And now we will go onto the sensor itself
And you can see that even there we still have a lot of interference
So we will go back to our bolt on the side of the engine
To show you just how much stronger that signal can be
We also have a feature in the software if
You go to the little arrow in the drop down box where we can put active filtering on
We will now see as the software works once it gets to the end of the screen
It will clean up the signal quite a lot
So switch off the software and turn the engine off
And you can see how we have put the active filtering on and cleaned the signal
If you put too much active filter on
You will have a problem that it makes the signal too clean
As is some of the comments to some of our signals
So we try to capture things as we see them
And we may filter or we may not
I tend to not filter things too much otherwise we get too clean a signal
Thank you for looking at this video