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Changing the Y-Axis

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Changing the Y-Axis

Postby matt » Wed Feb 10, 2010 11:48 am

Hi all,

I am using the 2205 PC Scope to measure voltage but I would like display current vs time instead of volts vs time. Using Ohms law I can calculate the current from the voltage but I was wondering if there is a way of changing the Y-Axis in the Picoscope 6 software to show current instead of volts?

Kind regards,

Matt
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Re: Changing the Y-Axis

Postby Autonerdz » Wed Feb 10, 2010 4:55 pm

Matt,

The easiest way to do that would be to use a current probe. This would pick up the current in the circuit inductively and provide a proportional voltage to the scope. Then just create a custom probe within PicoScope that will provide you with a current scaling. We use them a lot in automotive work.

http://www.picoauto.com/automotive-accessories.html


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Re: Changing the Y-Axis

Postby matt » Thu Feb 11, 2010 12:31 pm

Hi,

Thanks for your response.

The current I a trying to measure is nA. Would the probes be sensitive enough to detect this?

Thanks
matt
 

Re: Changing the Y-Axis

Postby Autonerdz » Thu Feb 11, 2010 5:21 pm

Nope. 10mA min for the low current probe.
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Re: Changing the Y-Axis

Postby Erik » Mon Feb 15, 2010 9:02 am

You can create a custom probe for that channel in PicoScope6 to do the conversion from V to I. Search for "Custom Probes dialog" in the help file in PicoScope6.

Or you can look it up in the help file contents panel.
Menus -> Tools menu -> Custom Probes....
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