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IES Shop >> Advanced Energy Design Guide for K-12 School Buildings: 50% Energy Savings >> Advanced Energy Design Guide for Small to Medium Office Buildings: 50% Energy Savings >> Approved Method: Photometric Testing of Skylights and Tubular Daylighting Devices under Hemispherical Sky Conditions Cart Items: 0  Total: $0.00
May 19, 2012
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    Approved Method: Photometric Testing of Skylights and Tubular Daylighting Devices under Hemispherical Sky Conditions
    Approved Method: Photometric Testing of Skylights and Tubular Daylighting Devices under Hemispherical Sky Conditions
    Click To Enlarge
    2010 – 14 pages
    8 1/2 x 11 Softcover
    ISBN: 978-0-87995-242-6
    LM-81-10
    Product ID: LM-81-10
    Price: $35.00
    Member Price: $24.50
    Product Detailed Description
    This guide provides the IES required uniform method for determining and reporting the photometric characteristics of skylights and tubular daylighting devices.  It describes the procedures followed and the precautions observed in obtaining uniform and reproducible measurements of tubular daylighting devices and skylights with glass or plastic glazing (not recommended for devices with clear glazing). This guide identifies the components and the structure type needed to adequately measure daylighting devices.  The procedures, calibration of the equipment, and determination of sun angles and sky conditions are also discussed.

    Contents
     
    Scope and Purpose
    General Lighting Characteristics
    Test Distance
    Goniophotometer Basic Construction
    Goniophotometer Structure
    Calibration
    Sky Conditions
    Testing Procedures
    Testing Procedure Steps
    Limitation of Skylight Photometry

    Annex A  Accuracy of the Quadrant Testing Method
    Annex B  The Testing of Transparent Skylights
    Annex C  Accuracy Analysis of Reflections from Black Card
    Annex D  Calculation of Standard Tine for Different Solar Elevations
    References
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