User`s manual

doc-3331-2 OverView cDG67-DL (August 2003) 6-18
As mentioned before, the optical dimmer can modify the brightness between 100% and 50%. It is
obvious that the target value cannot exceed the max. possible value (100%) or be lower than the
min. possible value (50%). In case the user enters a value beyond the max. target value, or a value
below the 50% limit, the following message pops up:
Message
Desired Brightness not achieved
Figure 6-30
Warning: the user target value is beyond the range of the dimmer
Please note: this message does not indicate a dimmer failure!
This message indicates that the dimmer cannot achieve the desired value but
operates at his limits (100%, or 50% respectively).
Lumens lock mode
The dialog to modify the target value of the brightness comprises also a checkbox Control
Brightness regularly
. If selected, the systems automatically checks the brightness in intervals of
about 30 hours. If the brightness changes (e.g. due to lamp aging processes), the dimmer is ad-
justed accordingly to maintain the defined brightness.