2401 trigger

[omud]

Hi all,
I'm planning to perform Voltage-Capacitance measurements using a Keithley 2401 source meter (2401 SMU) and HIOKI IM3523 instruments.

The idea is to sweep DC voltage by 2401SMU and in each trigger of it, I want to trigger the HIOKI too and read the capacitance of my DUT. Then collect the obtained data and plot the C-V curve.

I have a vi to control the 2401 SMU and an another vi to trigger the HIOKI.(Both work fine and I used them separately)

I tried to use “Case Structure”, (to trigger the HIOKI after triggering the 2401 SMU) however couldn’t find an “Event source” from 2401 vi related to triggering in sweep mode.

Would anyone can help me?

I’m attaching the vi.

Regards,
Omid

[GerdW · Accepted solution]

Hi omud,

does your K2401 support to output a trigger signal (in hardware)?

does your HIOKI support to input a trigger signal (in hardware)?

Can you connect both using a trigger line?

Another (rather simple) approach: start the K2401 sweep and the HIOKI measurement at the "same" time by sending the commands simultaneously. (Maybe start the HIOKI first, followed by K2401.)

[omud · Accepted solution]

Right now I don't have that cable.
Instead, I added a timed loop with delay time to initiate and delay trigger time.
With a try and error and some adjustments, I've been able to control the both device and acquire data.
It works. however I would be pleased the enhance it and design it in a more precise way.
I'll continue digging through forums to learn more.

Thanks for your kind response and considerations.
Cheers

[buchaiah]

could you send the full VI