ANSI IESNA RP-27.2:2000 pdf download.Recommended Practice for Photobiological Safety for Lamps &Lamp Systems-Measurement Techniques.
The ANSI/IESNA RP-27 series of standards appiles to all electrically powered sources of optical radiation that emit in the wavelength range from 200 nm to 3,000 nm. The standards do not app’y to any lasers or to those light emitting diodes used in optical fiber communication systems.
This standard is to be used by the radiometrist for guidance regarding special problems related to photobiological hazard measurements. Additionally, specific recommendations are included to provide consistency and to reduce test design time and effort.
It is impractical for this standard to teach all of the concepts or provide all experience needed to make accurate photobiologcal safety measurements.
Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of the American National Standard. At the time of pubhcation, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent editic’s of the standards indicated below.
ANSI/IESNA RP-27.1 -1996, Photobiologica! Safety of Lamps and Lamp Systems – General Requirements. New York: Illuminating Engineering Society of North America. ANSI/IESNA RP-16-1996, Nomenclature and Definitions for Illuminating Engineering. New York: tiluminatirig Engineering Society of North America.
IESNA LM-9-2000, Electrical and Photometric Measurements of Fluorescent Lamps. New York: Illuminating Engineering Society of North America.
IESNA LM-20-1 994, Method for Photometric Testing of Reflector Type Lamps. New York: Illuminating Engineering Society of North America.
IESNA LM-45-2000, Electrical and Photometric Measurements of General Service Incandescent Filament Lamps. New York: Illuminating Engineering Society of North America.
4.1 Lamp Seasoning
To maintain stable output during the measurement process and provide reproducible results, lamps shall be seasoned for an appropriate period of time. During the inftial period of operation a lamp will change as its components come to equilibrium. If measurements are taken of an unseasoned lamp, the variations within the measurement period and between measurements will be significant. As the output of a lamp generally decreases over life, the seasoning time should be short to result in conservative hazard evaluations.
Seasoning of lamps shall be done as stated in IESNA LM-54. For the purposes of these standards, the lamp output at the end of the seasoning period is the initial output. For lamps not covered by the LM-54 standard, a study may be required to find the minimum time required to stabilize the operation of a source.
4.2 Test EnvIronment
Measurements shall be made in a controlled environment. The operation of sources and measurement equipment is impacted by environmental factors. Additionally, the formation of ozone in the measurement path may compromise accuracy and may present a safety hazard.ANSI IESNA RP-27.2 pdf download.