Keithley 2450 sweep_current limit while maintaining voltage increase

[Richard2]

Hello, 

I'm using Keithley 2450 sourcemeter for IV sweeping

I'm trying to source voltage sweep with current compliance; however, the voltage does not increase after the current limit point. 

I'm using example of keithley 2450 read_single and I included <For loops> for sweeping voltage. 

Same issues happen with the example keithley 2450 sweep and aquire.  

I attached a picture explaining my situation 

Can someone help me?

Thanks in advance.

[GerdW]

Hi Richard,

---

@Richard2 wrote:

I'm trying to source voltage sweep with current compliance; however, the voltage does not increase after the current limit point. 

---

What does the device manual say about this behaviour?

Does it describe a way to create your measurement with limited current while increasing voltage?

In case of "Yes!": which commands to you need to send to the device?

After all the device is controlled via SCPI commands: you can always create your own VI to send commands and receive the measurement data, as SCPI simply means "Use VISA fro device communication"…

[cstorey]

This is really a Keithley forum question about how SMUs work.  They have a few modes you can use when you hit a source limit.  You will want to read the manual (p 6-91) for the :SOURce:SWEep:VOLTage:X <failAbort> feature.  In almost all cases the default is to disable the output on compliance limit and stop the sweep.  You can however change that behaviour to continue the sweep and hold V/I at the compliance limit using the SCPI command previously mentioned.

Hope that helps,

Craig