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- [ LTL2000 Retrometer ]
- [ QD30 Reflectometer ]

On site quality control of road markings in agreement with CEN specifications

• Textured and profiled surfaces
• Dry & wet surfaces
• Measurement in full daylight
• Stray light compensation
• Portable, selfcontained instrument
• Measurement geometry corresponding to realistic viewing conditions in daylight and in roadlighting in agreement with the prEN 1436 specifications
• Direct digital read-out of the mean luminance coefficient in diffuse illumination, Qd
• Built-in printer
• Data storage in internal non-volatile memory
• RS 232 serial interface for data output, extended control, calibration and diagnostics
• Carrying case, including calibration standard

The Qd30 Reflectometer is a Self-contained, portable instrument with built-in power supply capable to measure reflection properties of road surfaces and road markings observed by drivers of vehicules under day - and roadlighting conditions. The Qd30 Refletometer measures the reflection and calculates the mean luminance coefficient in diffuse illumination (Qd) in agreement with the prEN 1436 specifications. Results is shown on 32 characters LCD display. Built-in printer and non-volatile memory provide registration of measurement results and corresponding supplementary data.

Serial interface RS232 is included for extented control, calibration and data output. The Qd30 Reflectometer is powered by a rechargeable battery with a capacity corresponding to approx. 1000 measurements. A mains powered battery charger is supplied as a standard accessory.

QD30 Reflectometer Specifications (Specifications in agreement with prEN 1436 draft:)

• Field of measurement: width 45mm x length (typ.) 175 mm
• Illumination: diffuse according to CEN
• Observation angle: 2.29°
• Aperture angle: ±0.17°
• Equivalent observation distance: 30m
• Min. reading (mcd-m^-2-lx^-1): 0
• Max. reading (mcd-m^-2-lx^-1): 318
• Quantity: Qd, mean luminance coefficient in diffuse illumination (mcd-m^-2-lx^-1)
• Instrument dimensions: 71 L x 57 W x 48 H cm
• Weight: 12 kg
• Gross weight: 30 kg
• Power supply: internal 12V, 3.5Ah sealed lead-acid battery external charger
• Memory capacity: min. 1000 measurements
• Serial communication: 9600, N, 8, 1
  Interface: RS232

Technical references

• A review of the suitability of the average luminance coefficient. Qo for road surfaces and road markings and proposal for a different parameter. Light & Optic Note No. 8.
• Mean luminance coefficient in diffuse illumination, Qd, for road surfaces and road markings. Laboratory tests. Light & Optics No. 21.
• CEN/TC226 WG2 "Horizontal Signalization" Horizontal Roadmarkings Applied on the Road, Performance for Road Users, Draft 1992.
• BAST - Test report of the lighting engineering part characteristics of the Qd30 Reflectometer, Test No. 4594.
• Qd30 Reflectometer - Comparison of laboratory and daylight measurements. Night Traffic Note 1 - Nordic Research Cooperation

Standard Delivery

• Qd30
• Carrying case
• Reflection standard - calibrated
• Battery charger

Options

• Calibration certificate
• Calibration service

Selected references

• Bundesanstalt für Straßenwesen - (D)
• Deutshe Studiengesellshaft für Straßenmarkierungen - (D)
• Degussa AG - (D)
• Transportministerium - (ES)
• French Road Reasearch Center (LCPC) - (F)
• Superfos Construction A/S - (DK)
• Belgian Road Reseach Center - (B)
• Road and Traffic Reasearch Institute - (S)
• Cleanosol AB - (S)