This document is the user manual for RetroSign GR1 and GR3 Retroreflectometer. It provides information about the features and characteristics of the products.
The RetroSign retroreflectometer is a portable field instrument for measuring the retroreflection of road signs under headlight illumination. It supports several measurement geometries (ASTM, CEN, Safety) and offers optional accessories such as GPS, RFID and Bluetooth for enhanced data logging.
The manual covers setup, measurement procedures, calibration, battery management, and communication options (USB, Bluetooth, RFID). It also includes detailed specifications, maintenance guidelines, and example log pages.
| Aperture reducer size (standard) | 15 mm (0.60 in) |
|---|---|
| Aperture reducer size (optional) | 10 mm (0.40 in) |
| Battery capacity | Many hours of measurement capacity (rechargeable) |
Press the red trigger knob on the handle; the display shows WAIT and a sound signals the end of the measurement.
The Sequence ID can contain up to 12 alphanumeric characters.