Instruction Manual PEL-4 Precision LED Sector Light Vega Industries Ltd Aug 2018
PEL-4 Precision LED Sector Light Page 20 of 69 Manual Version V1.06
The PEL-4 is capable of outputting its full intensity range from minimum to maximum in
each of night and day operation. Additionally, one of night or day intensities can be set to
zero. There is no relationship user-programmed between the night and day intensity
values and any combination of valid values is programmable.
In normal automatic day/night mode, the PEL-4 is continually sampling the daylight level.
The default construction of the PEL-4 places the photocell inside the rear cover, obscuring
it from the intense light output of the PEL-4. It is important to ensure that the rear cover is
not obscured from daylight if automatic day/night operation is required. The PEL-4 will
transition from night to day operation, or vice versa, after three consecutive, filtered
daylight samples agree that the user-programmed Lux threshold has been reached. The
PEL-4 will nominally respond to a light level change in thirty seconds, and will take slightly
longer if fixed character is selected.
There are 12 different day/night transition light levels allowing for a shorter or longer night.
Operation =Program (or read) = 1 (or 9)
Feature =Day/Night Control = 4
Value =Select from Appendix A =0YY
The first digit (0) of the Day/Night Control value should always be zero.
The YY digits of the Day/Night Control Value determine when the Day/Night transition
occurs. The lux levels of the twelve settings are detailed in Appendix A. The accuracy of
the light sensor is ±10%.
5.4 Night & Day Intensity Settings
The PEL-4 allows separate programming of night and day intensities. The intensity range
offered by the PEL-4 makes it practical to set the day intensity higher than the night
intensity in order to achieve similar day and night ranges in nautical miles. Zero is a valid
intensity setting. The programmable effective intensity settings are provided in Appendix B.
The PEL-4 is programmable in effective intensity or in peak intensity during the flash.
When an effective intensity is programmed into the PEL-4, the peak intensity is controlled
automatically for the selected flash character, using the default IALA E-200-4 2017 flash
compensation algorithm, to maintain the required effective intensity. The operator needs to
confirm from Appendix B that for any combination of programmed effective intensity and
flash character that the PEL-4’s maximum intensity specification is not exceeded.
An alternative flash compensation algorithm is available: IALA E-200-4 2008. Refer to
Appendix A for how to program this alternative mode.
When a ‘peak intensity during the flash’ value is programmed into the PEL-4 then no flash
compensation is calculated and the programmed intensity is used directly during the flash
on period. Refer to Appendix A for how to program this mode (i.e. no flash compensation).
To program night or day intensity using the TVIR Remote02:
Operation =Program (or read) =1 (or 9)
Feature =Intensity =1 for night intensity, 2 for day intensity
Value =Select from Appendix B =XXX XXX (6 digits)
(The 3-space-3 formatting of the six intensity digits in the example above and also in the
Appendix B tables is merely to aid in clarity).
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