Why Does My DSC Baseline Go Below Zero?

[jaejoon89]

My baseline for the DSC goes past zero (below 0 W/g) why would the instrument be doing this?

 

[alxm]

This may be obvious, but: Bad calibration?

 

[wangasu]

it goes relative to the initial value you put in. the absolute number does not mean much.

 

[chemisttree]

Perhaps you converted from one polymorph to another and a little energy was released? Have you run the same sample twice and noticed the negative value again?