VOLTAGE MEASUREMENT IN MS WITH KEITHLEY 2182A INSTRUMENT

[benamar9u]

hello everyone ,i have i probleme i can measure the voltage white KEITHLEY 2182A INSTRUMENT in ms , i have a current pulse width 10 ms and i want mesure the voltage,i made connection gpib with intrument ,i mesure  the voltage  with  current pulse 500 ms ,is not enough for me,pleaze help me.

[Albert.Geven]

Hi

You should measure into the buffer. So make sure you trigger at the right moment and afterwards read the buffer.

[Albert.Geven]

I now checked your vi.

You have set the integration to 5. Try 1 or off.

[benamar9u]

thank you for responding to my message,i use  fast mode 0,01 PLCS in integration rate but is too slow to mesure 1ms ,i read to datasheete ,i find that the maximum reading/s is 115/s ,i think to use the buffer ,i know that it can be store 1024 data ,but i don't know how can i used it with trigger .

[cstorey]

Can you explain how you want use the 2182?  Are you using it with a 6221 to do pulse delta measurements or just trying to read pulses directly?  (Pulse Delta Method - https://www.tek.com/document/application-note/2611-low-level-pulsed-electrical-characterization-mode... )

Or do you have an external pulse source you want to capture?  If external source then you will need to work on understanding the trigger model, as well as the reading buffers.  You can't simply put a read in a while loop and have it capture data at that rate, especially if you have a measurement configuration step in the loop every time.  It doesn't matter how small you make the NPLC, there still won't be time to process the setup changes and capture the pulse.

Here's an example you can look at.  It just takes multiple measurements at equal intervals for N pts.  It might work for you, but there are better ways to do it using a trigger. If you explain your pulse source, we can help setup triggering.

[benamar9u]

I use keithley 2182 with a external currenet pulse,dc power supply sorensen sga,I use the rear control(analog control j1) for creating currenet pulse,control Output ON/OFF Using Isolated TTL/CMOS Source,high state is mean power is on ,low state the power is off.then i want to capture th voltage when i plused the current .

[benamar9u]

Thank you for responding this message,and helping me.