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IES LM 78 2017

IES LM 78 2017

$27.08

IES LM-78 Approved Method for Total Luminous Flux Measurement of Lamps Using an Integrating Sphere Photometer

Published By Publication Date Number of Pages
IES 2017 30
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This approved method describes the procedures to be followed and precautions to be observed in performing reproducible measurements of total flux of lamps and luminaires using integrating sphere measurement systems. Two types of integrating sphere systems are presented, one employing a V(?) corrected photometer head, and another employing a spectroradiometer as the detector. In addition to the specifics of the two measurement systems, the common qualities and measurement techniques are discussed along with calibration and uncertainty analysis considerations.

PDF Catalog

PDF Pages PDF Title
1 Cover
3 Copyright
6 Contents
8 FOREWORD
INTRODUCTION
1.0 SCOPE
2.0 NORMATIVE REFERENCES
3.0 NOMENCLATURE AND DEFINITIONS
3.1 Total Luminous Flux
3.2 Sphere Efficacy
9 3.3 Sphere Responsivity
4.0 PHYSICAL AND ENVIRONMENTAL TEST CONDITIONS
5.0 INTEGRATING SPHERE EQUIPMENT
5.1 Integrating Sphere Geormetry: 4p
10 5.2 Integrating Sphere Geormetry: 2p
5.3 Sphere Coating
12 5.4 Baffle
5.5 Auxiliary Lamp
13 5.6 Photometer Detection
14 5.7 Spectroradiometer Detection
5.8 Lamp Holder and Mounting Hardware
15 5.9 Temperature Sensor
5.10 Electrical Circuits
6.0 CALIBRATION STANDARDS
6.1 Incandescent Standard Lamps
6.2 Incandescent Reflector Lamps
16 6.3 Discharge Standard Lamps
6.4 Solid-State Lighting Standard Products
6.5 Handling of Standards Lamps
6.6 Operation of Standard Lamps
17 7.0 TEST PROCEDURES
7.1 Total Luminous and Total Spectral Spectral Radiant Flux Calibration
7.1.1 Integrating Sphere with Photometer
7.1.2 Integrating Sphere with Spectroradiometer
7.2 Test Lamp Measurement Procedure
7.2.1 Integrating Sphere with Photometer
18 7.2.2 Integrating Sphere with SpectroRadiometer
7.3 Sources of Error
7.3.1 Self-Absorption
19 7.3.2 Spectral Mismatch
20 7.3.3 Sphere Angular Non-uniformity
7.3.4 Near-Field Absorption
7.3.4 Temperature Effects
21 8.0 UNCERTAINTY EVALUATION
9.0 MAINTENANCE OF INTEGRATING SPHERES
22 INFORMATIVE REFERENCES
ANNEX A – BASIC INTEGRATING SPHERE THEORY
24 ANNEX B – MEASUREMENT OF THE RELATIVE
SPECTRAL THROUGHPUT OF AN INTEGRATING SPHERE
25 ANNEX C – CORRECTION FOR THE ANGULAR
NON-UNIFORMITY ERRORS OF AN INTEGRATING SPHERE
ANNEX D – ALTERNATIVE GEOMETRIES AND CALIBRATION METHODS

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IES LM 78 2017
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