Daktronics AB-1600-1.5,2.5 - Manual (Page 23)

Electrical Installation
3-3
1. Line voltage, addressed in this sub-section.
2. 24-hour monitoring, which also is in this sub-section
3. Lamp voltage, checked after the display powers-up for the first time.
When complete, send one of the “Display Power Report” forms to Daktronics Customer Service. The
other form is for the customer’s records.
To complete the line voltage check, take a line reading of each phase and record the results on each of
the power reports in Appendix B. Then place a voltage monitor on the phase with the highest reading
for 24 hours. Record the maximum and minimum voltages on each of the reports as well.
If lacking the proper equipment to accurately monitor line voltage consider the following options.
• = Have the local power company take the readings.
• = Rent the equipment from a local service company.
• = Have Daktronics Customer Service recommend the proper equipment.
• = Rent the equipment from Daktronics.
If there is any reason to suspect large voltage fluctuations, place a recorder on the line for on at least
one phase of the power for one week while the display operates normally. Contact Daktronics
Customer Service with respect to this recording.
Display brightness and lamp life are generally determined assuming an average incoming line voltage
of 120 volts AC at 60 hertz. If the line voltage varies from that value, it will affect both lamp life and
brightness. Lamp life results will also vary with programming style and use of dimming mode.
Lamp life predictions are for lamps operating in a laboratory with continuous operation in a
stable temperature and mechanical environment. Actual values will differ from predicted life because
of switched operation, varying temperature, mechanical vibrations due to wind, traffic and sign
service and actual hours of operation. Data is that of the manufacturer.