• Author Author: robrenz
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Keithley 2450  Zener diode test

robrenz

I just had to try out the sweep functionality of the 2450 on a 12V zener.  Very easy to set up and the graph mode is very functional.The pan and zoom is a little slow and seems to have a glitch if you zoom in too far. Still very awesome.

 

As graphed with auto on X and Y axis Y is in linear mode

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As graphed with auto on X and Y axis Y is in Logarithmic mode. Notice Amperage is shown as all positive ??????

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Zoomed on the knee of the Linear Y graph

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Zoomed on the knee of the Logarithmic Y graph

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Zoomed on the forward conduction of the Logarithmic Y graph

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Time to get back to getting used to this unit and doing the review.

  • Hi Rob,

     

    Nice graphs! It is showing an incredible amount of detail. Clearly some very nice analog circuitry in the box. The log one is correct, without having an unusual/ fake y-axis - the easiest way to see this is to notice that as the values get smaller, it would need a very long axis (infinitely long) to reach zero amps.

    When I initially saw the roadtest, I was wondering if the built-in screen could do sufficient justice to the information it could capture, or if it would need to be permanently tethered to a PC. At first glance these screenshots show that the built-in display and graphing routines are highly competent.