Latest products and information available at www.sealite.com
36
SL-PEL Series
Sectored Port Entry Light
LIGHT SENSOR
The PEL can be setup to use either the internal light sensor or (optional) external light sensor. After 30
seconds of an ambient light change into a different threshold, the status will change.
By default the internal light sensor is used. The internal light sensor is a built-in light meter. Leading
bearings which shine into a rising sun will be late to switch to day intensity. Conversely, leading bearings
shining towards a sinking sun will be late to switch to night intensity.
Sealite recommends using the default settings when commissioning the PEL. If it is desired that the
sector PEL should switch on at same time as a buoyed channel then the site should be revisited. Use the
PEL as a photometer to read the value under the “Current Level” and select this number for Dusk; add 50
to this level for Day to enable the PEL to switch with other lights on site.
Note: The PEL samples both through the aperture (on top of the PEL) and through the lens; thus when
covering the aperture in bright conditions, reflected light may still be seen through the lens and therefore
keep the light switched off or in day mode.
The light sensors monitor:
Internal
•
Day/Dawn Threshold
(Default: 150)
•
Night/Dusk Threshold
(Default: 100)
•
Current Light
External
•
Day/Dawn Threshold
(Default: 128)
•
Night/Dusk Threshold
(Default: 80)
•
Current Light
Internal
light sensor
