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Long ago. and B. I don't have the test equipment I did then. I guess what I'm saying is don't be afraid to get too technical with me in your answers. What I wouldn't give for a helium leak detector right now...Maintenance Simply filter and replace the oil every 20–25 cycles. (The oil can be filtered and reused one time.); this is a straightforward task that takes only a couple of minutes.
. We have some really great 'techy' type guys here who are, as they have been exploring the FD mechanics and sharing that in their posts, writing what is turning out to be a 'troubleshooting manual' for us less capable folks.
Powdered bananas can be used in banana breads. We like using powdered fruits to flavor cakes or frostings.
And once you have resolved your issue I hope you will stay around and talk to us all about what you have been drying in your machine, etc.
The unit can also connect to and communicate the freeze dryer cycle data to a nearby PC through an ethernet cable.
Freeze drying isn’t my only preservation method, but it’s my favorite. Keep the skills of canning, dehydrating, fermenting and more in your pocket so you have various ways of preserving food. They all have their pros and cons but non-e should be ignored.
The process involves freezing the food and then reducing the surrounding pressure to allow the frozen water in the food to sublimate directly into vapor. This method is particularly effective for fruits, vegetables, meats, and even complete meals.
A bit of background on me - I used to work in a sold state fabrication lab (university research lab) and had a lot of hands-on work with ultra-high vacuum equipment. The pumping we do for freeze drying was what was required to just start
I love that the small freeze dryer can be placed on a kitchen counter. Having it in the kitchen makes it convenient and always ready to start the freeze-drying process.
It appears that the ice build up inside the chamber sublimates as well as the ice in the food. Eliminate the ice and the process is faster, and less water ends up in your oil.
The only way I know to filter the water vapor out would be a cold trap. They usually use liquid nitrogen or dry ice to keep the temperature low enough that all the water condenses out. Obviously website you would need a supply of the liquid nitrogen or dry ice that would probably not be cost effective for most of us. The other option to get that cold would be to use a cryocooler and build a cold trap around it. It could be done, but would be pretty expensive. I've been watching some electronics on ebay that have cryocoolers in them, but the cheapest I've seen is around $600. Still not a cheap option, but you wouldn't need dry ice or liquid nitrogen to feed it.
Control of the amount of time a material is held at the ultimate freeze temperature before the drying cycle is started.
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