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Author Topic: Anyone else see a 15K do this @ 500 hrs? Floyd Justin Newton Jedi Master Film Handler Posts: 559 From: Phoenix, Arizona, USA Registered: Jun 2002 posted 04-29-2004 07:08 PM                     OK fjn Local 294 Ret.  |  IP: Logged Brian Michael Weidemann Expert cat molester Posts: 944 From: Costa Mesa, CA United States Registered: Feb 2004 posted 04-29-2004 07:21 PM                        In my experience with our 15K Ushios, the warrantee runs out at 1000 hours or 250 strikes, whichever comes first. And for no reason at all are they to exceed 1200 hours. This has been a good working model, as we change them out RIGHT at 1000 hours.  |  IP: Logged Dominique Replogle Film Handler Posts: 61 From: Highland Utah Registered: Apr 2004 posted 04-29-2004 08:57 PM                        I will pass that on to the museum director. Thanks Brian.  |  IP: Logged Robert Stawiarski Film Handler Posts: 62 From: MW Registered: Aug 2003 posted 04-29-2004 09:07 PM                    Dominique: That information is also contained (almost verbatim) in the IMAX manual. You can e-mail or call Ushio (ask for Bob Fujihara) or IMAX directly for something more "official" to give to your theatre director. We change them out every 1000 hours as well. I know of theatres that run 1200 hours or more consistently, but it is not worth the potential risk of a lamp degassing in the middle of the day -- or worse -- a lamp explosion out of warranty.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 04-29-2004 09:20 PM                     Guys, They are only running the 15K's at 12KW and going to 1200 hours in leiu of running at the top end, which is not needed anyway, has been most sucessful in all of the CDC and Iwerks installations. No explosions that I know of anyplace. This museum is also on a tight budget that they have to follow. If they have a lamp de-gas in the middle of a days run they will switch to running a 2D print of which there is usually one or two around. Mark  |  IP: Logged Adam Martin I'm not even gonna point out the irony. Posts: 3686 From: Dallas, TX Registered: Nov 2000 posted 04-29-2004 11:56 PM                     The blue color is from the tungsten electrodes reacting with the influx of oxygen to create a tungsten odide residue on the quartz envelope. The oxide may also be yellowish in color.  |  IP: Logged Paul Mayer Oh get out of it Melvin, before it pulls you under! Posts: 3836 From: Albuquerque, NM Registered: Feb 2000 posted 04-30-2004 12:42 AM                        At Caesars the Duratest 15K's were warranted and pro-rated at 1,000 hours. That's the interval we used for changing out the lamps.  |  IP: Logged Carl Martin Phenomenal Film Handler Posts: 1424 From: Oakland, CA, USA Registered: Feb 2002 posted 04-30-2004 06:04 AM                        quote: the warrantee runs out at 1000 hours or 250 strikes, whichever comes first. ... we change them out RIGHT at 1000 hours. so if you haven't accumulated 250 strikes, that means you're doing 4+ hours per strike. is the bulb left on between shows? i'm surprised you can do that with a 15k. not that i know too much about imax... just curious. carl  |  IP: Logged Darren Briggs Master Film Handler Posts: 371 From: York, UK Registered: Dec 2001 posted 04-30-2004 08:09 AM                        I had a few problems with Osram short 2k lamps recently, both had broken seals, you could see parts of the glass seal in the envelope. The lamp was also blue. Superior quartz seem to have re-designed there short 2K lamps and now last as long as they should do! Had a few instability problmes with the old design. Ligh5t going very flickery after 1500 hours. Darren  |  IP: Logged Dominique Replogle Film Handler Posts: 61 From: Highland Utah Registered: Apr 2004 posted 04-30-2004 11:23 AM                        We run our projectors from ten in the morning to about ten fifteen in the evening six days a week. We do not turn the lamps off between shows because we only run 15/70 alternating from 3D to 2D each show. At times in the slow season we might not sell a show and just leave the lamps on. Assuming that Carl's question was directed toward me, that is what we do. Do you guys recommend we turn the right eye lamp off for the 2D shows and when we do not sell a show? Our time between shows back to back all day runs around fifteen minutes.  |  IP: Logged Robert Stawiarski Film Handler Posts: 62 From: MW Registered: Aug 2003 posted 04-30-2004 11:42 AM                    The general rule is that if a lamp is not going to be used for two hours or more, then turn it off and restrike it later. If you are running a 2D show and have a 3D show an hour later, leave both lamps on for the 2D show. Of course, only certain 3D systems can do this. IMAX, for instance, has a split-dowser system on some of their GTs that allows both lamps to be on for a 2D show, but many GTs have the single large dowser and only one lamp can be on for 2D. It sounds like you have a similar split-dowser setup, and since you said you alternate from 3D/2D for most shows, I would leave both lamps on.  |  IP: Logged Brian Michael Weidemann Expert cat molester Posts: 944 From: Costa Mesa, CA United States Registered: Feb 2004 posted 04-30-2004 02:07 PM                        We run the split-dowser GT system. Our current schedule is: 11:00am Sacred Planet 2D 12:30pm NASCAR 3D 1:50pm Sacred Planet 2D 3:10pm Sacred Planet 2D 4:40pm NASCAR 3D 7:00pm NASCAR 3D 8:20pm NASCAR 3D 9:40pm NASCAR 3D We strike the one lamp in the morning, the other for the 12:30pm, then we shut off the lamps and re-ignite just the one for the block of 2D's, then the second one again and leave them on for the whole night, including the hour+ break before 7:00pm. (Then we alternate which deck we run the 2D on every few weeks.) I think this is the most efficient use, keeping both hours and strikes low. A couple months after Matrix Revolutions opened, we were running that movie one show at 11:30am and another at 6:00pm (with a 35mm show in between), so of course every show got its own lamp strike and 2.5 hours ... those lamps lasted eight months before we had to change them out, because of schedules like this!  |  IP: Logged Dominique Replogle Film Handler Posts: 61 From: Highland Utah Registered: Apr 2004 posted 04-30-2004 02:20 PM                        Brian, we are looking at bringing in Sacred Planet? Good Film?  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 04-30-2004 10:23 PM                     We run our lamps 1200Hrs and they are left lit all day (unless there is a split morning and evening type schedule Between shows they are on standbye of 275amps  |  IP: Logged Brian Michael Weidemann Expert cat molester Posts: 944 From: Costa Mesa, CA United States Registered: Feb 2004 posted 05-01-2004 05:16 AM                        Hey Dominique. I believe you saw my review of the film in the reviews section. To summarize: pretty looking film, kinda slow, overall good and traditional IMAX grade documentary stuff. As for the topic at hand, is there any evidence that standby mode extends lamp life? It was my impression that it was mainly for cooling reasons that the lamps go "to half" when the dowsers are closed (even though there wouldn't be any benefit anyway to have them at full when not on-screen).  |  IP: Logged

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