Here's a good guide for vaping temps:
CA NORML Health Information

But it's not that simple. You don't say what vape you're using and that's important when it comes to digital. On the high end digital models ($400-500+) you may get a more or less accurate display reading of the bowl temp. Then you've got the cheap digital models. On these digital is mostly hype. You can't depend on the display to give you the true temp. You should use the setting that cooks your herb properly-browned but not black-and use the display setting as a reference point.