Christie CP2000-X User Manual page 92

BASIC OPERATION
How Old is My Lamp? 
When to Replace 
the Lamp
Maintaining Footlamberts 
3-50
Close the douser (shutter) to put
the projector in a cooler stand-by
mode where lamp power is reduced
to 50% of its maximum rating (or
75%, if using a 2 kW or 3 kW
lamp). Upon opening the douser
and restoring the image, the lamp
power will return to its previous
setting.
When a new lamp is installed and its serial
number recorded (Advanced: Lamp menu),
the lamp timer resets to "0" and begins
logging time for the new lamp. This total
appears in both the Advanced: Lamp menu
and the Status menu. See right.
The Status menu also shows "Total Lamp
Hours", which is the accumulated time
logged for all lamps installed thus far. Each
past lamp log also appears in the Advanced:
Lamp History menu.
Assuming the Lamp Expiry Message
checkbox has been enabled in the Advanced:
Preferences menu (recommended), an expiry
message will appear on the TPC (as an alarm
window) when the lamp has reached its
defined Lamp Limit and should be replaced.
Regardless of the Lamp Limit chosen, never
exceed the warranted lamp lifetime by more than 20%, as an old lamp becomes
increasingly fragile and more prone to sudden failure or even explosion, which can
be damaging and dangerous. These maximum limits appear in Table 3.15.
Table 3.14. When to Replace Your Lamp
Lamp
NOTE: Hours shown here are 20% beyond the pro-rated credit warrantied lifetimes
See 6.4, Replacing the Lamp & Filter for instructions.
Over time, as the theatre screen ages and dust and dirt collects on the port window,
the theatre may no longer be achieving the expected footlamberts as reported by the
TPC. It is a good idea to periodically recalibrate footlamberts (refer back to Figure
3.26).
Replace BEFORE:
(kW)
2.0 2880 hours
3.0 1728 hours
4.5 1080 hours
6.0 600 hours
(see page 8-3). Do not exceed.
Figure 3.35. Lamp Hours
CP2000-X User Manual
020-100031-01 Rev. 1 (03-2009)