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Topic: Christie Lamp voltage
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John Pytlak
Film God
Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 11-13-2002 02:09 PM
Some lamphouses/consoles use a meter that can be switched between measuring current and voltage. If so, be sure the meter is periodically calibrated to read correctly.If measuring voltage output of the rectifier, remember that the ignition pulse can "fry" your voltmeter, and perhaps even give you a nasty high voltage shock. So measure open circuit (lamp not lit) voltage with the igniter disabled, and operating voltage (lamp lit) after the lamp has stabilized and you are sure the igniter won't strike again. Always follow safety precautions around energized circuits to avoid electrocuting yourself. 
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John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
e-mail: john.pytlak@kodak.com
Web site: here Kodak Website
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Daryl C. W. O'Shea
Film God
Posts: 3977
From: Midland Ontario Canada (where Panavision & IMAX lenses come from)
Registered: Jun 2002
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posted 11-13-2002 02:15 PM
Why would the company want to know the voltage? It would be easier and safer for 'lesser trained' projectionists to just read off the amperage and supply that. It tells them basically the same thing.Any xenon bulb report I've seen is limited to (for each bulb): - Projector/Aud. #
- Serial Number
- Make
- Wattage
- Running Amps
- Physical Appearance (blackening, etc.)
- # Hours on Bulb
- # Hours before replacement and - # of new bulbs on hand of each wattage used.
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Rick Long
Jedi Master Film Handler
Posts: 759
From: Toronto, Ontario, Canada
Registered: Nov 1999
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posted 11-20-2002 12:01 AM
I totally agree, John, provided the reports are studied by, at least those who fill them out (hopefully the projectionist).
If a side-by-side comparison of the preceeding month's reports show an indicator changing state as time goes on, then it may indeed be an indication of impending failure, which can be avoided.
With booth staff changing in some of our theatres as often as the school seasons, however, either interest in such a project, or the necessary understanding may be lacking.
On a similar note, I had suggested at one time, that we get a copy of all the Performance Interuption Reports from all of the theatres that we service, so that we might spot problems that occur with some frequency.
Some of them were non-descriptive, "had a film-break" ect., some of them led to a common problem that was solved by moving the position of a feed roller ect., and some were downright entertaining.
One of the reports I liked most, was the one which read " Used computer watch to tell me when to start shows. Didn't work, resulting in some shows starting late. Won't use that method again!".
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