Runco Video Xtreme VX-44d Installation & Operation Manual page 67

HOW LONG CAN I MAINTAIN BRIGHTNESS? The VX-44d/-55d can maintain your
"Intensity" setting until the required power reaches the maximum rating for the lamp. The
lower the setting, the longer it will take to reach this threshold and the longer you can
maintain the desired brightness. Keep in mind that once the lamp power reaches its
maximum wattage (see "Power," above), this tracking is no longer possible. At this point,
the lamp will gradually begin to dim as usual, even though your original "Intensity" value
will still appear in the menu. To resume accurate tracking, reduce the intensity setting so
that the resulting "Power" value is less than its maximum—the lower the intensity, the
longer it can be maintained.
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: Not used. Use the DHD Controller to record the serial number for a
newly-installed lamp. For detailed lamp replacement instructions, refer to Lamp and
Filter Replacement on page 77.
Runco VX-44d/-55d Installation/Operation Manual
more easily maintained as the lamp ages.
51
Installation
RVR 7