I agree totally with Alan. If anything, the defrost cycles stress the critters even more. Go for it. Tom Parker -----Original Message----- From: Alan P Van Dyke <[email protected]> To: pestlist <[email protected]> Sent: Wed, Dec 12, 2018 5:32 pm Subject: Re: [pestlist] Freezer Temp Question
Our freezer does the same thing, and we haven't noticed any affect on treatment. Items in the freezer will hold their temperature pretty well during those short spikes - it's mostly the air temp that is affected. My predecessor hollowed out a paperback dictionary just enough to accommodate a thermometer so we could monitor how stable the temperature of the inside of a book is. We were pretty impressed how little it moved once down to temperature. Alan Alan Van DykeSenior Preservation Technician Harry Ransom Center The University of Texas at Austin P.O. Drawer 7219 Austin, TX 78713-7219 P: 512-232-4614 www.hrc.utexas.edu On Wed, Dec 12, 2018 at 4:22 PM Todd Holmberg <[email protected]> wrote: Hello Pestlist, I have a question related to freezing treatment temperatures. At the museum I work at, we recently put a data logger in our freezer. We took the readout this morning, and now have our first chart showing the temperature conditions inside over the course of a full 7-day week. Something came up on the readout that I wanted to run past this group and see if anyone had any opinions on it. The "base/normal" temp in the freezer is -28 F, and it holds that pretty steady. There were 8 temp spikes though. The doors remained shut the entire week, and my guess is the spikes are related to a defrost cycle. The spikes were all virtually identical and lasted 55 minutes. The temp went from -28 to -14, then back to -28, with about 20-25 minutes of temps warmer than -22 (I have heard -22 F is a significant temp relating to freezing effectiveness- is that true?). Does anyone have an opinion on whether or not spikes where the temp rises between -22 F and -14 F for 20-25 minutes would have a significant affect on a freezing treatment? My guess is there will be approx. 10 of these spikes per week, but we will see about that as more weekly charts come in. If anyone has an opinion or thoughts they would be appreciated. Thanks,Todd-- You received this message because you are subscribed to the Google Groups "Museumpests" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/pestlist. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/CAMxAh%2Bi_c%3DmzW1kaQd1Om3iPPsQTbh-X%2B-4i2Cc018dYrPFQ%3Dw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Museumpests" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/pestlist. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/CAHhLO3YKJ0wuDF4APj%2BVu71F3GXj8OuGrvoZsZg-o4tcXJJ1AQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Museumpests" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/pestlist. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/415028324.3380274.1544655683001%40mail.yahoo.com. For more options, visit https://groups.google.com/d/optout.
