HP 4155A 4 point measurement

[zagaraa]

Hello everyone,

I was wondering if anyone has a 4 point measurent vi for HP 4155 A semiconductor parameter analyzer. For that matter, if you know where to find one or suggest me, that would
be helpful.

Thank you

[SunshineDesign]

I am working with the 4155 and coding for it presently. What you ask is not too difficult. Have you tried to setup the test manually first.

From there you shouyld be able to program the setup. You don't have enought specification to do much of anything with a 4 point 

measurement. You need to clearify what you are looking to do. Are you setting all 4 SMU's to sample or swep the bias. What do you need to 

read back?

[zagaraa]

Dear SunshineDesign

Thank you for your quick reply. 

Yes I can measure manually and got measurement results on floppy driver. I just want to use Labview.   

I clearify what I want. SMU1- current swep (I), SMU2 common, SMU3 - voltage V1, SMU4 - voltage V2. I only insert SMU1 current swep range. Read back data will be dV=V1-V2 and SMU1 swep current.

This is called CTLM Kelvin method to measure resistance (R=dV/I).  

Thank you 

[SunshineDesign · Accepted solution]

I can't just give you the routines I made to cover it all as my client paid to have to work done. Steps are to Initializer the instrument, set the measurement mode (swept), then calls to config-chan-SMU-sweep and config-sweep-primary-sour, next config-meas-timing and config-sweep-paramaters,next config-dsplay-graphics to set the x and Y axis,define the output data and sweep and finally op-download trace to get the data out. The rest you will have to put together. Order of the channel setups can make a difference. Some SMU setup orders don't always take and be sure to clear old setup out before the new goes in. Good luck.

[SunshineDesign]

So did my inputs help you get to the solution?

[zagaraa]

Actually not. But if I follow your inputs I hope can do it. 

I know it waste time. So could you tell me a way how to get your solution?