CV-LS Dashboard
D20980.022 Rev C
CV-LS User Manual
Page 66
Equalizer
The CV-LS Equalizer is a closed loop controller using a small light tap off the led to control the source
current and maintain a constant power output. This value is displayed as the “Light Feed Back” (LFB) in
the Status section, and “Current Light Output” (CLO) in the Equalizer section. The LFB value is calculated
from a much shorter averaging period than the CLO value. The LFB can be used to see a live view of the
light output, while the CLO value is used by the internal control loop of the Equalizer.
The basic operating modes of the light source use constant current supply for the LED. This maintains a
constant output over time as long as the LED temperature does not change. Age also plays a role, but in
LEDs, the timespan is quite long. The LED in the CV-LS is rated for 50,000 hours at an LED temperature of
70C. This means that at 50,000 hours the LED will still produce 70% of its intensity.
Figure 15: Equalizer (Left: Dashboard, Right: Web Interface)
