Operation Manual

10/ 2010 BENNING LUXMETER B
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Table of content
1. Introduction ................................................................................................ 16
2. Standards for field illuminance (lux) meters ..............................................17
2.1 DIN-standards for field illuminance (lux) meters .......................................18
3. General about illuminance ......................................................................... 18
3.1 The origin of light ....................................................................................... 18
3.2 RadiometricandPhotometricvalues .........................................................18
3.3 Basic photometric definitions ..................................................................... 18
3.4 Photometricunitsconversiontable ...........................................................19
3.5 FAQ:IlluminancevsLuminance ................................................................ 19
3.6 What is the CIE V(λ)curve? ......................................................................21
3.7 Whatiscosinecorrection? ........................................................................22
4. Illuminance measurements ........................................................................23
4.1 When and why to measure illuminance ....................................................23
4.2 Some useful hints to ensure accurate measurements .............................. 23
4.3 Howtomeasureaverageilluminance? .....................................................24
4.4 Calibration of illumination testers ..............................................................24
5. Standardilluminationvalues......................................................................25
6. Technical data ...........................................................................................26
6.1 Illuminance probe BENNING Luxmeter Typ B ..........................................26