Evaluation of Interference Suppression of Fluorescent Lamps.
Abstract
The evaluation of the interference characteristics of commercial fluorescent fixtures advertised as interference-free, including both hotcathode and cold-cathode lamps, demonstrates that those fixtures which are completely enclosed electrically are free of interference. A hotcathode instant-start fixture, with conductingglass door panel, interchangeable with an aluminum honeycomb door panel covering a one-piece metal fixture proved to be greater than 6 db below the specification limits shown in BuShips MIL-I-16910(A). The cold-cathode lamps tested failed to meet specification limits. An enclosed fixture which failed to pass specification tests was modified by electrically bonding at all junctures at approximately 2-inch intervals, including the 2-inch by 2-inch by 1-3/8-inch- deep grill. By this means interference was reduced to an acceptable level. Light emission from the interference-free commercial fixture was measured, and the conducting-glass panel and the honeycomb aluminum panel caused a loss of approximately 10%. Replacement of the nonconducting panelclosure gaskets with radio-frequency-suppressing gasket stripping, resulted in an average reduction of 7 db in the magnetic induction field. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 06, 1961
- Accession Number
- AD0265780
Entities
People
- David B. Clark
Organizations
- Naval Facilities Engineering Service Center