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Approved Method: Optical and Electrical Measurements of AC-LED Packages and Arrays or Modules

Optical and Electrical Measurements of AC-LED Packages and Arrays or Modules

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ANSI/IES LM-88-18
Document Type: Lighting Measurement and Testing (LM)

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SKU: ANSI/IES LM-88-18 Category: Tag:

Product Description

Approved American National StandardLighting practitioners have found it difficult to obtain accurate optical and electrical characteristics of AC-LEDs at realistic elevated-temperature operating conditions. This document describes the procedures to be followed and precautions to be observed in performing optical and electrical measurements of AC-LEDs for total luminous flux, total radiant flux, total photon flux, color characteristics, electrical voltage, current, and power. This Approved Method applies to AC-LED packages, remote-phosphor AC-LED packages, AC-LED arrays or modules, and remote-phosphor AC-LED arrays or modules. This document specifies measurement methods under single-cycle AC operation as well as continuous AC operation with an AC frequency of 50 Hz or 60 Hz.

Page count: 12 pages
Publisher: Illuminating Engineering Society (2018)
SKU: ANSI/IES LM-88-18
ISBN-13: 978-0-87995-361-4

Chapters:

  • 1.0 Introduction and Scope
    2.0 Normative References
    3.0 Definitions
    4.0 Optical Measurement Instruments
    5.0 Electrical Measurement Instruments
    6.0 Preparation for Measurements
    7.0 Method of Measurement under Single-Cycle AC Operation
    8.0 Method of Measurement under Continuous AC Operation
    9.0 Optical Measurements
    10.0 Test Report

 
Citation Format:
Illuminating Engineering Society. ANSI/IES LM-88-18, Approved Method: Optical and Electrical Measurements of AC-LED Packages and Arrays or Modules. New York: IES; 2018.

CONTENTS

  • 1.0 Introduction and Scope
  • 2.0 Normative References
  • 3.0 Definitions
  • 4.0 Optical Measurement Instruments
  • 5.0 Electrical Measurement Instruments
  • 5.1 Performance of Electrical Measurement Instruments
  • 5.2 Measurement Uncertainties of Electrical Measurement Instruments
  • 6.0 Preparation for Measurements
  • 6.1 Seasoning
  • 6.2 Operating Orientation
  • 6.3 Thermal Conditions
    6.3.1 Junction Temperature
    6.3.2 Ambient Air Temperature
  • 6.4 Airflow
  • 6.5 Humidity
  • 7.0 Method of Measurement under Single-Cycle AC Operation
  • 7.1 General
  • 7.2 Measurement Procedure
  • 7.3 Estimation of the Measurement Uncertainty
  • 8.0 Method of Measurement under Continuous AC Operation
  • 8.1 General
  • 8.2 Measurement Procedure
  • 8.3 Methods Used to Determine the Initial Reference Current, IF(0)
    8.3.1 RMS Initial Reference Current, IF(0)rms
    8.3.2 Instantaneous Initial Reference Current, IF(0)ins
  • 8.4 Estimation of the Measurement Uncertainty Due to Junction Temperature Rise
  • 9.0 Optical Measurements
  • 10.0 Test Report
  • 10.1 General Information
  • 10.2 Description of DUT
  • 10.3 Description of Measurement System
  • 10.4 Environmental Conditions
  • 10.5 Measurement Conditions
  • 10.6 Description of Measurement
  • 10.7 Optical Quantities (Time-Averaged) (Typical)
  • 10.8 Electrical Quantities (Typical)
  • Additional Reading
  • Informative References