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February 10, 2012
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    Guide for Testing the Calibration of Locking-Type Photoelectric Control Devices
    Guide for Testing the Calibration of Locking-Type Photoelectric Control Devices
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    This Lighting Measurements Guide advocates a standard procedure using standard test equipment for measuring illumination operating levels on photoelectric controls by means other than daylight.
    Product ID: LM-48-01
    Price: $20.00
    Member Price: $14.00
    Product Detailed Description
    Covered here are the system aspects that must be understood to calibrate light-sensitive control devices used in roadway and area lighting. In addition, supplemental information is provided for the construction of a suggested test apparatus suitable for such testing. This Guide revises and replaces the previous edition last published in 1984.
     
    Calibration of photoelectric control devices by outdoor methods is expensive and time-consuming. That's because the large number of variables involved make it extremely difficult for outdoor methods to provide calibration with universal meaning, thus such procedures are commercially impractical. However, an adequate system may be developed around an arbitrary simulation of sky and surrounding conditions.
     
    This Guide provides a common dialogue for obtaining "bench mark" control setting values useful to both photoelectric control manufacturers and their customers. Following an introduction discussing seven variables that must be considered when building a test instrument, the main sections of this Guide are: test equipment specifying all the important electrical and physical characteristics of the test apparatus; test procedures calibrating with illuminance standards traceable to NIST and determining turn-on and turn-off levels; and test report specifying the control description and test information that must be recorded.
     
    To assure that the method presented in this Guide yields reasonable accuracy, a test apparatus (calibration box) was designed and built to verify the procedure. Full details, including assembly drawings, schematics, and parts lists are presented in an annex. This "test box" allows checking of the photoelectric control device’s turn-on and turn-off settings. 
     
    2001 - 16 Pages
    8 1/2 x 11 Softcover
    ISBN: 978-0-87995-181-8
    LM-48-01
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