Agree with you @Soxhlet. Here is a rule of thumb I have adopted. I place a thermocouple on top of the boiling flask. In the case of spd near the neck. I have a meter for this. My mantle thermocouple is placed at liquid level outside the glass and between the flask and the mantle.
When the two readings are more than about 40C apart top to bottom it is time to turn down the PID and give the compound time to catch up to the glass. Give the top glass time to catch up to the bottom in temp. When running I do not like a greater than 30C differential. I wrap my boiling vessels in fiberglass cloth in an effort to get all the glass close to the same temp inside the vessel.
I have found in my rigs I can precisely predict when cannabinoid will begin to flow into the collection bulb based on the glass temp at the top of the boiling vessel measured on the top of the glass of the boiling flask near the neck. Horizontally this happens at about 135C as measured on the glass for the horizontal rig at Ā¾ micron.
Canāt find a suitable thread after a bit of searching so Iāll post it here - has anyone ever purchased or has experience with a contaminated mantle? Iām going to turn it on for some tests today but it seems like a boil over or spill happened into the mantle and the mantle is covered in resin on one side. Iāve used some fucked up mantles in my chem days but I never did bulk resin distillation on those mantles, so I know mantles can continue to work in poor shape.
Will the resin burn off or will it burn for real and start a fire? Do I need a new mantle? Can I slowly ramp to prevent black charring? This is a LS 12 mantle w stirring.
Running it completely out of control (no thermo-probe) might actually achieve flame, but the fiberglass shouldnāt actually catch fire or burn.
If there is enough crude inside the device, it might not survive a āburn outā, but if youāre not willing to drill out the rivets and look inside, then you might as well give it a tryā¦
Iām just glad itās the one mess you didnāt make me clean up! Haha.
And didnāt you also try to (solvent) wash the crude out to some extent? I remember being more worried about the solvent catching fire over the crude.
@NewLevelProcess, if one were so inclined, I bet a bunch of the soaked in crude could be cleaned out if the mantle were suspended upside down and sprayed heavily with solvent, blotting away the tincture with clean rag as it starts to become saturated. Havenāt tried it, but it works out in my head. Best of luck getting it back operating normally!
