Instrument function

Physically the instrument is dominated by the “control tower”. The tower contains the Rl il- luminating and observation system and the control electronics.

The unit on top of the base structure contains the Qd illumination system, the observation sys- tem is the same for both Rl and Qd.

The base structure contains an optical system with mirrors that directs Rl illumination beam towards the road surface and the Rl or Qd signal to the detector through a dust-protection window. The measuring area is shielded by an aluminium housing.

The instrument is controlled by a microprocessor that executes the measurement automatical- ly by the push of a button and presents the result on a display. The result is automatically transferred to an internal non-volatile memory. The result and corresponding measurement id, time and date can be printed by the built-in printer. The LTL2000S(Q) is operated with a small keyboard located at the top of the Retroreflectometer. Further, Retroreflectometer con- trol is possible over a serial communication link (RS232). Stored data can easily be trans- ferred to a host PC for further processing.

The LTL2000S(Q) is powered by a built-in lead acid battery, which under normal operation will keep the Retroreflectometer operating a normal working day. The battery is recharged by use of an external charger.

Factory calibration

The LTL2000S(Q) Retroreflectometer is factory calibrated. This calibration is carried out by using calibration units mounted in specially designed frames. The calibration unit's values are measured in the laboratory using traceable methods and equipment.

Notes on error sources

Stray light can enter the instrument between the skirts and the road. Leakage will under nor- mal measurement conditions not be significant. Nevertheless it may occur. Before each meas- urement the LTL2000S(Q) automatically evaluates the leakage and the result is compensated before read out. In case of a significant leakage level a warning or error message is given and special precautions such as screening may be necessary.

Instrument leak, drift and offset errors are compensated by means of data obtained during the calibration procedure. It is very important to keep the light trap, the dust-protection window and the ceramics on the calibration unit clean. Especially the light trap is critical.

The LTL2000S(Q) illumination angle is 1.24° relative to the road surface. Because of this small angle accurate placement on the road is important. Avoid pebbles and abnormal irregu- larities.

The LTL2000S(Q) must be parallel with and close to the road.

The LTL2000S(Q) Retroreflectometer is a rugged instrument, but it is an optical instrument and must be handled as such.

DELTA

LTL2000S(Q) Retroreflectometer

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Delta LTL2000S manual Instrument function, Factory calibration
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LTL2000S specifications

The Delta LTL2000S is a high-performance lighting solution designed to meet a variety of needs in both residential and commercial settings. This innovative product emphasizes efficiency and versatility, making it an ideal choice for those seeking to enhance their lighting systems. With advanced technology and a focus on user-friendly features, the LTL2000S has quickly become a staple in modern lighting applications.

One of the standout features of the Delta LTL2000S is its energy efficiency. Utilizing LED technology, this lighting solution provides significant energy savings compared to traditional incandescent or fluorescent bulbs. The LTL2000S offers a luminous efficacy that allows for bright illumination while consuming minimal power. This eco-friendly approach not only helps reduce electricity bills but also lowers the environmental impact, aligning with sustainable living principles.

The LTL2000S is designed for flexibility and adaptability, making it suitable for a wide range of applications. With multiple mounting options, including wall, ceiling, and pendant installations, this lighting fixture can seamlessly integrate into various spaces, from residential homes to commercial offices and retail environments. The sleek design of the LTL2000S is aesthetically pleasing and complements any interior decor, providing functionality without compromising style.

Furthermore, the Delta LTL2000S features advanced lighting controls that enhance usability. Options like dimming capabilities and programmable settings allow users to customize their lighting experience based on specific needs and preferences. The incorporation of smart technology means that the fixture can be easily integrated into existing smart home or building systems, providing seamless automation and control.

Durability is another key characteristic of the LTL2000S. Built with high-quality materials, it is designed to withstand the rigors of various environments, ensuring longevity and reliability. The robust construction also includes heat dissipation technology, which prevents overheating and extends the lifespan of the unit significantly.

In conclusion, the Delta LTL2000S stands out in the competitive lighting market due to its energy efficiency, versatility, advanced controls, and durable design. Whether used in residential or commercial applications, it serves as an excellent solution for modern lighting needs, blending performance with aesthetic appeal. This product is truly an example of innovation in lighting technology, catering to the demands of today's consumers while promoting sustainability.
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