Instruction Manual
VLB-67 LED Beacon
© Vega Industries Ltd, July 2014
VLB-67 LED Beacon
Page 33 of 52
VLB-67 V1.0.17
Using the tables:
1. The VLB-67 beacon is programmed for the effective intensity required. For example a 4NM
light at 0.74T has an effective candela of 37 Candela. Program code 0037
2. The bold numbers in the current tables indicate the effective Candela settings that can be
programmed for a particular colour. For example the highest effective candela that a red
beacon can be programmed is 77 Candela.
3. The VLB-67 beacon has automatic Schmidt Clausen correction to maintain the effective
intensity for short flash periods. For example to achieve an effective candela of 37 Candela
(4NM) for a 0.3 flash period the peak intensity required is 62 Candela (37Candela*(flash
0.2)/flash period)
4. The Maximum Candela the beacon can output for each colour is shown at the bottom of the
table together with the peak current. For example the maximum output for the Red marine
beacon is 140 Candela at a current of 330mA.
5. The beacon is unable to output more than the maximum candela. The user should check
that the beacon is able to reach the peak candela required after the Schmidt Clausen
correction. In the example above the peak candela for the 0.3 flash is 62 Candela and
below the maximum of 140 for the red marine beacon. The beacon will therefore support
the flash for the required range of 4NM
6. To determine the on current of a flash it is necessary to determine the peak candela
required. Using the example of the 0.3-second flash for a red beacon. The peak candela is
62. The currents for settings bordering this value can be obtained from reading across from
the effective candela column, 155mA for 77 Candela, and 95mA for 54 Candela. The option
is to use the higher of the 2 currents (155mA) or carry out a linear approximation between
the two values, (116mA=95mA+(155mA-95mA)/(77Cd-54Cd) *(62Cd-54Cd)
7. The off current of the beacon between flashes and the base current when the beacon is not
operating (switched off during daytime) are provided at the bottom of the table.
