Subject: Re: [sloan-25mlog 3336] 2.5m obslog 20170123 (SJD 57777) From: John Downey Date: Tue, 24 Jan 2017 08:16:52 -0700 --Apple-Mail=_49A7ABF7-EFFC-4DBD-97B1-51E6271BCF08 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Some time with a heat gun is mostly what it would take. Melt any ice = and then work the water out from one end to the other by pressing up on = the bulb. We do have a big roll of that seal material. I'll have to look at my = notes tomorrow, but I think its enough to replace both seals a couple = times over if any experimenting causes trouble. Ben and I noticed some ice in the inside seal when we were installing = the second one. I too was a bit hesitant to put some holes in them, but = now I'm thinking it may be worth a try. We could also look at trying to close the ends, where the moisture is = probably getting in. Maybe leave the seals long so we can fold flaps = over and glue with some rubber cement? I've never been entirely happy = with the ends of those seals. If we did this, we'd still need some = holes to vent air when the door closed and compressed the seal. But = then we could put a couple holes higher up and on the inside. John > On Jan 24, 2017, at 7:54 AM, Mark Klaene wrote: >=20 > I saw this as really good news =97it meant we stopped water from = getting in =97I would caution not making any changes that might undo = things and thus allow water back in =20 >=20 > If anything education and training of observers should be the only = thing needed. the time to move off the water is likely well worth it = compared to water infiltration and damage . >=20 > mark >=20 >=20 >=20 >=20 >=20 >=20 > On Jan 24, 2017, at 7:46 AM, John Downey > wrote: >=20 >>>=20 >>> Notes: >>> - When we opened the southwest enclosure door a lot of water was = spilling out >>> onto the ground. It was coming out of the rubber seals on the bottom = of the >>> door. We had to squeeze out (like a tube of toothpaste) substantial = amounts of >>> water and ice before we could open the door all the way and open so = we would get >>> water all over the telescope. >>>=20 >>=20 >> We'll make some holes in the rubber seals, that should be easy = enough. >>=20 >> ____________________________________________________________ >> Logs of Nightly APO Activities > >> = https://trac.sdss.org/tracmailman/browser/private/sloan-25mlog/index.html = >=20 > Mark Klaene > Site Operations Manager=20 > Apache Point Observatory voice: 575 437 6822 > PO Box 59 fax: 575 434 5555 > 2001 Apache Point Rd cell: 575 430 0210 > Sunspot NM 88349-0059 web: www.apo.nmsu.edu = =20 >=20 >=20 >=20 >=20 --Apple-Mail=_49A7ABF7-EFFC-4DBD-97B1-51E6271BCF08 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 Some time with a heat gun is mostly what it = would take. Melt any ice and then work the water out from one end = to the other by pressing up on the bulb.We do have a big roll of that seal material. I'll = have to look at my notes tomorrow, but I think its enough to replace = both seals a couple times over if any experimenting causes trouble.Ben and I noticed some = ice in the inside seal when we were installing the second one. I = too was a bit hesitant to put some holes in them, but now I'm thinking = it may be worth a try.We could also look at trying to close the ends, where the = moisture is probably getting in. Maybe leave the seals long so we = can fold flaps over and glue with some rubber cement? I've never = been entirely happy with the ends of those seals. If we did this, = we'd still need some holes to vent air when the door closed and = compressed the seal. But then we could put a couple holes higher = up and on the inside.JohnOn = Jan 24, 2017, at 7:54 AM, Mark Klaene = wrote:I saw this as = really good news =97it meant we stopped water from getting in =97I would = caution not making any changes that might undo things and thus allow = water back in If anything education and training of observers should be the = only thing needed. the time to move off the water is likely well worth = it compared to water infiltration and damage .markOn Jan 24, 2017, at 7:46 AM, John Downey wrote:Notes:- When we opened the southwest enclosure door a lot of water = was spilling outonto the ground. It was coming out of the = rubber seals on the bottom of thedoor. We had to squeeze = out (like a tube of toothpaste) substantial amounts ofwater= and ice before we could open the door all the way and open so we would = getwater all over the telescope.We'll make some holes in the = rubber seals, that should be easy enough.____________________________________________________________Logs of Nightly APO Activities https://trac.sdss.org/tracmailman/browser/private/sloan-25mlog/= index.html Mark KlaeneSite Operations = Manager Apache Point Observatory = voice: 575 437 = 6822PO Box 59 = = fax: 575 = 434 55552001 Apache Point Rd = cell: 575 430 = 0210Sunspot NM 88349-0059 = web: www.apo.nmsu.edu = --Apple-Mail=_49A7ABF7-EFFC-4DBD-97B1-51E6271BCF08--