Have a bit of an issue with a used rotovap I just picked up.
I have a temp probe inside boiling flask and another probe in water bath.
First I heat the water bath to 50c (double checked with second temp probe)
This gives my ethanol in the flask a temp of 47c
When I turn my vacuum pump on, as soon as distillation begins ~(28inhg) and the condenser is dripping the temp in the boiling flask begins to drop, as soon as the temp drops to ~32-33c distillation stops.
After distillation stops I bleed air back into the system and the temp rises.
Any input is appreciated