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Author Topic: Running with the lamphouse open Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 05-26-2007 10:33 AM                     While I suppose Ozone may be a risk and it definately affects some more than others. Most A/V projectors, even with xenon lamps don't have exhaust stacks and they will vent into the room and present its full heat load to the room. I bigger risk is the unfiltered UV exposure. You'd be amazed how fast one can get a sunburn if their skin is in the direct path of xenon light...and I'm talking just a few minutes. Steve  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 05-26-2007 11:50 AM                        Breathing even small amounts of ozone can have adverse health effects. Better to be safe than sorry. Dying of cancer makes me more aware of all the potential carcinogens I've been exposed to during my life. And a UV burn increases the risk of skin cancer.  |  IP: Logged Marc Hansen Film Handler Posts: 93 From: Seattle, WA, USA Registered: Dec 2000 posted 05-26-2007 12:18 PM                     quote: Steve Guttag I bigger risk is the unfiltered UV exposure. You'd be amazed how fast one can get a sunburn if their skin is in the direct path of xenon light...and I'm talking just a few minutes. No kidding, I do a lot of tig welding and if I'm not carefull I get sunburns thru my clothes. Marc  |  IP: Logged Frank Angel Film God Posts: 5305 From: Brooklyn NY USA Registered: Dec 1999 posted 05-29-2007 09:34 PM                        OK, forgive me if I add a bit more water to the fire hose (Jack, that was PERFECT!), and Chris, this is not just reemphasizing what you've already heard, I think you understand now the reason for our somewhat passionate concerns -- anyone who has seen how distructive bulbs are when they explode -- taking out eyes, even severing arteries -- knows that you have to have as much respect for them as you would handling a container of nitro -- but here's something from a slightly different perspective: When situations like this come up, and they always will when equipment and man are put together in the same environment -- rather than risk injury to people, let the risk be to the equipment. In this case, if management demanded that the show be kept on the screen at all costs, then just let the cost and risk be to the damn equipment -- let it run as hot as it pleases and whatever happend from that point on, so be it, but it will be to a bulb exploding inside a contained lamphouse, not out in open air. Run it safely from the standpoint of the personnel who need to come in contact with it and if the thing finally fails, hey, then it fails with no harm to anyone except its own innards. If management wants to accept risk, let it be to his lamphouse, not his workers. Someplace on here there is a picture but I can't find it at the moment, of an exploded bulb and what the lamphouse looks like after the event. I have copies of it pasted up on the walls of our xenon followspots. It's a very effective motivator preventing the young operators from giving in to the temptation to futz around with the lamphouse and the interlocks. Too bad we don't have that picture of the guy's face with the shards of quartz protruding out of his forehead, neck, cheeks and severed nose. John P., what was that great line of yours?...."And the last thing the projectionist saw was the xenon bulb exploding" ?!!  |  IP: Logged

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