Proceq ZDR 6020 Instruction Manual page 8

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Markings of different colours can be measured.
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User friendly, multilingual user interface
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In accordance with true CEN geometry of EN 1436 (RL), ASTM E1710 (RL) as
well as ASTM E2177 (RL wet).
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Approved by the accredited association StrAus-Zert, Germany (test No. 0913-
2009-05).
Measuring principle:
The ZDR 6020 Dynamic Retro-reflectometer R
road markings true to scale.
R is the coefficient of retroreflected luminance (night visibility) of road markings.
L
The observation angle of 2.29° corresponds to the viewing distance of a vehicle
driver of 30 m under normal conditions. The illumination angle is 1.24°.
The angle definitions above are valid for EN 1436. It is important to understand that
EN 1436 and ASTM E1710 use a different illustration of the same angles.
measures the Retroreflection of
L
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