Key facts
- Brand
- RetroSign
- Model
- GR3
- Documents
- 2
- Languages
- EN · ZH
- Last added
- 2012-05-08
Start here
RetroSign GR1 & GR3 Retroreflectometer User Manual
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.
RetroSign GR3 specifications
| 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) |
Source: RetroSign GR1 & GR3 Retroreflectometer User Manual
All RetroSign GR3 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How do you start a measurement?
Press the red trigger knob on the handle; the display shows WAIT and a sound signals the end of the measurement.
From: RetroSign GR1 & GR3 Retroreflectometer User Manual
What is the maximum length for a Sequence ID?
The Sequence ID can contain up to 12 alphanumeric characters.
From: RetroSign GR1 & GR3 Retroreflectometer User Manual
What is the operating temperature range of the Retrosign GR3?
The device operates from 0 °C to +50 °C (32 °F to 122 °F).
How long does it take to charge the GR3 battery?
Charging takes about 15 minutes.