Runco Video Xtreme VX-44d Owner's Operating Manual page 72

Installation
RVR 7
For example, a 1000-Watt lamp can be driven at no more than 1000 Watts. To produce
desired brightness at the screen, a new lamp would likely need less than this maximum
rating — perhaps 812 Watts (example only). Over time, however, the lamp requires more
and more current in order to generate the desired light, until eventually the lamp wattage
reaches its 1000-Watt maximum and the lamp power automatically levels off. At this
point, the tracking function terminates (that is, the power level stabilizes) and the lamp
begins to dim normally. Either reduce your "Intensity" setting or replace the lamp.
Do not lower the "Intensity" so much that the corresponding "Power" value reaches its
minimum — the intensity setting will be inaccurate and cannot be maintained.
1. Lamps become more stable over time, thus a specific intensity is
Note
2. Intensity can be set only if the lamp is in "Intensity" mode
3. Intensity cannot exceed the output of Max Brightness mode.
RVR (Reflectance Volume Regulation): The optical aperture inside the projector
controls the diameter of the light beam passing through the system. With a fully open
aperture (slidebar default of "0"), the maximum amount of light passes through for
maximum brightness in your images. Increase the slidebar setting to reduce the aperture
diameter and maximize contrast ratio instead.
Lamp History (read-only): Lamp History shows the lamps most recently installed and
recorded in the projector. The Lamp History automatically updates whenever you record a
new lamp serial number; the new lamp is added to the end of the list.
Change Lamp: Select Change Lamp from the Lamp menu to record the serial number
for a newly-installed lamp. For detailed lamp replacement instructions, refer to Lamp and
Filter Replacement on page 79.
more easily maintained as the lamp ages.
60 Runco VX-44d/-55d Owner's Operating Manual