3nh YS4580plus Traffic Sign 45/0 Geometry Spectrophotometric Colorimeter

Overview

The 3nh YS4580plus Traffic Sign 45/0 Geometry Spectrophotometric Colorimeter is an ISO- and CIE-compliant portable spectrophotometer engineered for high-accuracy color measurement in regulatory-critical applications—particularly traffic signage, retroreflective sheeting, pavement markings, and safety-critical coated surfaces. It implements the CIE No. 15–recommended 45/0 optical geometry: a 45° circumferential ring of LEDs uniformly illuminates the sample while a coaxial 0° detector collects reflected light, eliminating directional bias from surface texture, gloss, or microstructure. This geometry ensures metrological consistency across heterogeneous, granular, or striated samples—such as thermoplastic road markings or prismatic reflective films—where traditional 8°/d or d/8 instruments may yield inconsistent spectral reflectance data. The instrument employs a concave holographic grating and a 256-pixel dual-array CMOS sensor to acquire full reflectance spectra at 10 nm intervals (FWHM ≈ 10 nm) across the visible range (400–700 nm), enabling traceable computation of CIE tristimulus values, chromaticity coordinates (x, y; u′, v′), luminance factor Y, and multiple color difference metrics under standardized observers (2° and 10°) and illuminants (D65, A, C, D50, F-series, etc.). Its integrated UV LED channel supports quantitative assessment of optical brighteners and fluorescent pigments commonly used in high-visibility signage materials.

Key Features

• Regulatory-grade 45/0 optical configuration compliant with CIE No. 15, ISO 7724-1, ASTM E1164, DIN 5033 Teil 7, GB/T 3978, GB 2893, and GB/T 18833—validated for traffic sign conformity testing.
• Φ20 mm large-aperture measurement port optimized for low-uniformity surfaces including textured road markings, embossed reflective films, and coarse-textured plastics.
• Dual-mode LED illumination system with independently switchable UV component for fluorescence compensation and excitation-controlled measurement of optically brightened materials.
• High-fidelity spectral acquisition: 256-channel CMOS array, 10 nm spectral resolution, 0–200% reflectance range, and <0.1% photometric repeatability (400–700 nm).
• Robust hardware architecture: 3.5″ capacitive touchscreen, onboard storage for ≥30,000 measurements, rechargeable Li-ion battery (5,000 measurements per charge), and IP52-rated enclosure for field deployment.
• USB 2.0 and Bluetooth 4.0 dual-mode connectivity for real-time data streaming, remote firmware updates, and integration into centralized QC workflows.
• Preloaded traffic-sign-specific reference libraries: GB 2893 safety color palette and GB/T 18833 retroreflective sheeting chromaticity limits, supporting polygonal and rectangular tolerance zones for pass/fail evaluation.

Sample Compatibility & Compliance

The YS4580plus is validated for use on non-uniform, semi-diffuse, and geometrically complex surfaces where conventional integrating sphere geometries introduce angular sensitivity artifacts. It meets the physical and metrological requirements for routine inspection of road surface markings (ASTM D4212, EN 1436), retroreflective sheeting (ASTM E808, EN 12899-1), and traffic signal lenses (SAE J578). Its 45/0 geometry eliminates inter-instrument variability caused by specular highlight interference—critical when measuring glossy or metallic-coated signs. All spectral data comply with GLP-aligned audit trails when used with optional PC software. The device satisfies traceability requirements under ISO/IEC 17025 when operated with NIST-traceable calibration tiles and documented SOPs. It supports validation against BCRA Series II ceramic standards (inter-instrument agreement ΔE*ab ≤ 0.2), ensuring lab-to-field measurement equivalence.

Software & Data Management

The bundled SpectraMagic NX-compatible PC software (downloadable from 3nh’s official portal) provides full spectral data export (CSV, TXT, XML), customizable reporting templates, statistical process control (SPC) charting, multi-sample batch analysis, and automated compliance flagging against user-defined or standard-based tolerances. Audit trail functionality logs operator ID, timestamp, calibration status, and measurement parameters—supporting FDA 21 CFR Part 11 readiness when deployed in regulated manufacturing environments. The software enables creation of multi-vertex polygonal color acceptance regions aligned to GB/T 18833 Annex B chromaticity diagrams and permits simultaneous evaluation of luminance factor (Y) and chromaticity (x, y) against dual-limit thresholds. Raw spectral curves can be exported for third-party modeling (e.g., Kubelka-Munk inversion, pigment concentration estimation).

Applications

• Traffic infrastructure quality assurance: Luminance factor (Y) and chromaticity coordinate verification of road markings, delineators, and retroreflective sheeting per GB/T 18833 and EN 12808.
• Automotive exterior component color matching: Paint, plastic trim, and lighting lens color consistency checks under D65 and A illuminants.
• Textile and printing QC: Evaluation of dye lot consistency, metamerism index (MI), whiteness (WI), yellowness (YI), and colorfastness indices (staining/alteration grades).
• Plastics and electronics: Color stability monitoring of UV-stabilized housings, LED diffusers, and display bezels exposed to accelerated weathering.
• Regulatory documentation: Generation of ISO-compliant test reports for DOT, CE, CCC, and UN ECE R110 certification submissions.

FAQ

Does the YS4580plus support measurement of fluorescent road marking paints?
Yes—the integrated UV LED source enables excitation-controlled reflectance measurement, allowing accurate quantification of fluorescent pigments under UV-augmented daylight simulation (e.g., D65+UV).

Can the instrument validate compliance with GB/T 18833 chromaticity limits for Class I–III retroreflective sheeting?
Yes—it includes preconfigured chromaticity boundaries per GB/T 18833 Annex B and supports manual polygonal tolerance definition for custom sign specifications.

Is spectral data export compatible with third-party color formulation software?
Yes—full 400–700 nm reflectance spectra are exportable in CSV format, supporting import into BYK-Gardner LabSmart, X-Rite Color iMatch, and Datacolor Match Textile.

What is the recommended recalibration frequency for ISO 17025-compliant operation?
Daily zero and white calibration using supplied standards is required; annual verification against NIST-traceable reference tiles is advised for accredited laboratories.

Does the device meet electromagnetic compatibility (EMC) requirements for field use in roadside environments?
Yes—it complies with IEC 61326-1 (industrial EMC) and has passed conducted/radiated emission and immunity testing per EN 61000-6-3 and EN 61000-6-2.