Determine Tj during a CIL measurement

petercs

I am using a CRD-CIL12N-XM3 evaluation PCB with a CAB450N12XM3 module and a CGD12HBXMP gate driver, with the module mounted on a hot plate to do thermal tests. I measure the temperature of the base plate and assume that Tj equals the hot plate temperature. I want to estimate the "true" Tj and read somewhere that I could use SpeedFit software to get a better estimate of Tj. How do I set up SpeedFit to do this? The configurations in SpeedFit do not match the CIL pulse test configuration of the module.