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4.4.2 Using single iQ-LED modules for low light
With the iQ-LED Control SW version 3.2.0, you now have the option to turn off single iQ-LED modules in your
device. This option gives you another possibility to decrease the intensity inside your device. Please note that
when using single modules in edge positions of your LE7 (especially LE7-4x), the uniformity will decrease
significantly. If using single modules, it is recommended to only use the center-positioned iQ-LED modules. How
to deactivate/activate single modules is described in chapter 4.5 of the SW manual.
4.4.3 Low-light using the LE7-E
In the LE7-E device, the top center iQ-LED is combined with a 1,8 ND filter. When using only this module with
the described workaround from chapter 4.4.2, you will have the possibility to reach intensities to as low as 0,25
lx. For example, when considering both the ND filter value of 1,8 and a correction factor regarding the optical
structure, a generated illuminant D with 120 lx (using all modules, calibrated with the TE291 calibration chart)
should correspond to an intensity of approximately 0,25 lx when using only the iQ-LED module with the ND filter.
To get a rough idea of which intensities will appear when using only the ND module, you can use a Density Filter
Compensation value of
2,68
in the iQ-LED SW. Please see chapter 3.1.3 in the software manual for details.
Please note that it is impossible to measure such low intensities with the internal spectrometer. Instead, we
recommend using an external radio lux meter to verify the correct intensity.
5 ADDITIONAL INFORMATION
5.1 Maintenance
The spectrometer requires a recalibration yearly, regardless of the operating hours. If a spectrometer calibration
is necessary, please contact Image Engineering.
5.2 Care instructions
•
If dust is inside the integrating sphere, clean it with an air blower.
•
Do not remove the fiber from the spectrometer. Otherwise, the calibration is invalid, and the
spectrometer must be
recalibrated
!
5.3 Disposal instructions
After the service life of the LE7, it must be disposed of properly. Electrical and electromechanical components
are included in LE7. Observe your national regulations and ensure that third parties cannot use the LE7 after
disposal.
Contact Image Engineering if assistance for disposal is required.
