I don't think it even makes sense to adjust volts when you have watts. On a VW device, the VV mode is primitive and redundant.
Anyway, to answer your (rhetorical) question, here's how to get started. Just a few easy steps...
ProVari:
- Attach atty.
- Check resistance: CLICK CLICK CLICK CLICK CLICK CLICK CLICK CLICK CLICK CLICK CLICK CLICK CLICK (13 times).
- Wait 2 seconds
- Note coil resistence.
- If you happen to prefer about 8W, you can add 2 to the coil resistance to get a rough estimate of the target voltage. Or, for better precision, evaluate this expression: V = sqrt(W*R)
- Enter Voltage Up/Down mode: CLICK CLICK CLICK CLICK CLICK (5 or 7 times, depending on whether you need to adjust up or down).
- Wait 2 seconds.
- Increase voltage: CLICK CLICK CLICK CLICK CLICK ... until target voltage is displayed. If you overshoot, CLICK CLICK CLICK ...
- Wait 4 seconds.
- Vape.
A VW device:
On a Vamo, you may want to click DOWN, confirm your settings, and then UP to undo the previous DOWN. On an eVic, a Darwin, or any DNA 20D device, it's even better. Everything is already on the screen. No clicking at all unless you want to fine tune for taste.