Absolute Method Retro-Reflective Coefficient Tester | ASTM ISO Testing Machine
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The Absolute Method Retro-Reflective Coefficient Tester is a precision instrument designed to evaluate the retro-reflective performance of high-visibility safety materials under both dry and simulated rain conditions. It accurately measures the retro-reflection coefficient of sample surfaces, making it suitable for occupational high-visibility warning garments and other visibility safety apparel to ensure personnel safety and compliance with national standards.
Application
The tester is suitable for a wide range of applications:
Traffic Safety Materials: Assessing retro-reflective performance of road and railway signs, traffic safety uniforms, and school uniforms for visibility compliance.
Occupational Safety Garments: Evaluating high-visibility protective clothing worn by various professionals for safe warning and visibility.
Vehicle Inspection: Measuring reflective markings on trucks and commercial vehicles.
Quality Control: Testing reflective vests, license plates, and other materials for retro-reflective compliance.
Standards
The system supports compliance with the following standards:
GB 20653-2020 – Occupational High-Visibility Warning Clothing, Appendices C.4.1 (Absolute Method) and D
GB/T 28468-2012 – School Traffic Safety Reflective Uniforms
ASTM E808 – Standard Guide for Description of Retro-Reflective Materials (Reference)
ASTM E810 – Standard Test Method for Retro-Reflective Coefficient of Sheeting Materials (Reference)
DIN 67520 – Minimum Luminance Requirements for Traffic Safety Reflective Materials (Reference)
Parameters
| Parameter | Specification |
|---|---|
| Retro-Reflective Coefficient Range | 0.01–500 cd/(lx·m²) |
| Observation Angle | 12′–120′ (2°) adjustable, precision 3′, minimum division 1′ |
| Incidence Angle | 0.1°–40.0° adjustable, precision 0.5°, minimum division 0.1° |
| Sample Size | 150 × 150 mm |
| Light Source | Standard illuminant A as per GB/T 3978 |
| Sample Reference Center to Light Aperture | ≤12′, vertical illuminance uniformity ≤5% |
| Sample Reference Center to Detector Aperture | ≤12′, vertically adjustable for 12′–120′ observation |
| Detector Distance to Sample | ≥15 m |
| Wet Test Parameters | Spray nozzle 1000 mm from sample, 10°±1° vertical angle, uniform water flow, enclosed spray chamber, water flow equivalent to 284 mm/h |
| Spray Chamber | Rigid transparent material with movable panel, 150 × 150 mm light channel, black-painted edges to reduce scatter |
| Spray Nozzle | Diameter 1.19 mm, connected to supply tube for stable conical water column |
| Power Supply | AC 220 V, 50 Hz, 1 kW |
| Main Console Dimensions | 900 × 780 × 1700 mm |
| Sample Table Dimensions | 630 × 430 × 1900 mm |
| Sample Table Weight | 80 kg |
| Main Console Weight | 115 kg |
| Test Environment | Dark room, temperature 20°C ±2°C, humidity 65% ±5% |
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