产品介绍

Product Introduction

1、 Overview

The NJTT-301 Road Marking Retroreflection testing instrument is a specialized optical measuring device used to measure the reflective performance of road markings. The measured parameter is the retroreflective coefficient R '(or specific brightness) of the markings, in units of mcd · lx-1 · m-2. This instrument is easy to operate and has reliable measurement values, which can be used for both laboratory and on-site measurements. It is the preferred instrument for measuring the retroreflective optical performance of highway markings in production, quality supervision, engineering construction, supervision, and teaching and research units. This instrument is designed and developed in accordance with relevant international technical documents, as well as current standards. 

2. Standard:

International Commission on Illumination (CIE) publication No. 72, ASTM D4061-94, DIN67520, DIN67521, GB/T 26377-2010, GB/T 16311-2009, JJG (Transportation) 059-2004, DB36T978-2017, DB51T 2429-2017, JJF1809-2020.

3. Configuration:

(1) Instrument host (including: light source, optical system, detector, amplifier, display, etc.); 

(2) Instrument accessories (charger, zero adjustment board, calibration board, etc.).

4. Main technical parameters

1. Observation angle of the instrument α Is 1.05 º; Incidence angle β 88.76 º (complementary angle 1.24 º);

2. The color temperature of the light source is 2856K ± 50K (CIE A light source);

3. The detector is a silicon diode+V（ λ） Corrector, corrected by a filter, meets the CIE standard photometric observer spectral optical efficiency V（ λ） Requirements for;

The measurement range of the retroreflection coefficient (R ') is 0-1999 mcd · lx-1 · m-2.

5. Equipped with backlight function, it automatically turns on the backlight when turned on.

6. Battery continuous working time: ≈ 72 hours

7. Charging method: 220VAC 50HZ; DC8.4V

8. Battery capacity: Lithium (6600mAh)

9. Protection level: IP54

10. Operating temperature: -15°C ~ +60°C

11. Storage temperature: -30°C ~ +85°C

12. Operating humidity: 10~90%, no condensation

13. Net size: 455mm x 130mm x 130mm

14. Net weight: 3.9kg (main engine)