ON THE QUALITY OF TYPE YU-16 LUXMETERS
Abstract
The Type Yu-16 Luxmeter consists of a rectangular selenium photo-element, with a working area of 25 sq cm and a meter of 1.0 accuracy. The luxmeter has three basic measurement ranges of 25-100-500 lux and three supplementary ranges of 2,500-10,000-50,000 lux, obtained by means of an absorber mounted on the photo-element. The absorber consists of a metal frame holding two plates of frosted damped lucite. Between the two layers of lucite, there is an insert of opaque material with small openings. In accordance with technical specifications, the basic error of the luxmeter, with respect to its primary ranges, is ! 10% and, in its supplementary ranges, ! 15%, of the magnitude measured. To improve the quality of luxmeters of Type Yu-16, the following must be accomplished: (1) the quality of the selenium photo-elements must be greatly improved, and only photo-elements that have naturally aged over a period of 6-12 months should be installed in the luxmeters; (2) the absorber design must be changed: a smooth-surface plastic should be substituted for the matte plastic so that its surface can be kept clean; and (3) to insure stability of the photo-element's sensitivity, the sensitive layer must be better protected against moisture. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1962
- Accession Number
- AD0290554
Entities
People
- A.m. Fomina
- V.s. Khazanov
Organizations
- United States Army Engineer Research and Development Laboratory