Replacing arc lamp bulbs is something that needs to be done routinely on moving lights with arc lamps. I found a document online that gives information on how to replace the lamp for a MAC 700 Wash. Summarizing what Martin recommends for lamp replacement was very interesting and taught me some useful information.
The OSRAM SharXS HTI 700 W/D4/75 is the specific lamp for the MAC 700 Wash. Some of the quick facts about the lamp are that it has an average of 750 hours of life and 700 watts of power consumption. This can be counted in the fixture with a clock that can reset for lamp life, helping someone that services these fixtures at rental shops. Martin actually says not to exceed 75 hours past the lamp life. To help with lamp life it is recommended by Martin to let the lamp heat up for five minutes before dousing. This means that if the lamp has been turned on by accident it is better to leave it running for five to ten minutes before rushing to turn it back off.
OSRAM is the company that makes these specific lamps. In their documentation I found information like color temperature, which is 7500ºK. In the Martin fixture there is variable color correction available. OSRAM also specifies cooling of the lamp while operating to be forced air with a fan. That seems pretty obvious but it is important to specify on a document describing the lamp. Finally another interesting fact is that the cold strike for the lamp is 3,000 volts and the hot strike is 25,000 volts. OSRAM says that the lamp is capable of hot re-strike so long as the fixture can provide the ignition voltage.
There are diagrams that Martin has online to replace the lamp. Most importantly, time should pass after the lamp is off; 45 minutes is what Martin recommends. The head of the 700 Wash can get up to 185ºF before a warning message appears. This means that the lamp is clearly at a much greater temperature than that. In fact, OSRAM specifies a maximum of 842ºF for the lamp. Of course, Martin specifies cleaning the lamp with alcohol and polishing it as well.
The two documents were very interesting and straightforward. They left little to the imagination on how to replace the lamp and what lamp to replace it with. This is necessary for the correct and efficient operation of lighting fixtures.
No comments:
Post a Comment