933 Retroreflectivity Goniometer System

Benchtop four-axis goniometer system for testing sign sheeting and high visibility clothing. Inspection QA test tool for quick testing at multiple measurement geometries.

The 933 Retroreflective Workstation measures retroreflection (RA) and the retroreflective color of materials. The 933 contains a 3-axis motorized goniometer that features continuously adjustable β1 (-60° to 60°), β2 (-60° to 60°), and ε (-180° to 180°) angles, as well as a motorized, continuously adjustable α (0.2° to 2°) angle mechanism. The observation angle on the color detector is fixed at 0.33°.

The primary light sensor meets ASTM E1709 requirements with the CIE standard human eye response in conjunction with the CIE illuminant “A” lamp. The photometric filter accurately measures different colors without the need to calculate correction factors. The color detector features a 3-channel RGB sensor used to generate CIE1931 color coordinates.

The user interface features a high resolution color touch screen. A separate graphics co-processor provides quick, intuitive response as well as clearly rendered text and images for easy viewing of pertinent data.

The unit can be operated as a stand-alone unit, in which case the internal memory has the capacity to store readings and accompanying data for more than 30,000 measurements in non-volatile flash memory. Additionally, the 933 can be controlled over USB via simple ASCII commands to automate multi-measurement situations. USB drivers for Windows, Mac, and Linux are available, as well as sample Windows software utilizing Excel that demonstrates macro control.