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15R Spec Sheet 15R Tech Notes


Portable Specular Reflectometer,
Model 15R-USB

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The D&S Portable Specular Reflectometer Model 15R-USB is designed for field and laboratory measurements of flat or curved specular reflectors. It is powered by internal rechargeable Nicad batteries that operate for over 15 hours on a charge. The Reflectometer is six inches high and weighs just two and a quarter pounds. A single operator can easily take reflectance readings at the rate of 2 to 3 per minute and record the readings to data sets stored in the instrument. A USB port is provided for maintaining and downloading data sets and upgrading the firmware. These features make the Model 15R-USB ideal for monitoring soiling of solar reflectors in the field or for quality control in the manufacture and maintenance of reflectors and thermal control surfaces.

Key Features

bulletUSB: A USB port is provided for maintaining and downloading data sets and upgrading the firmware.
bulletLIGHT SOURCE: High intensity red light emitting diode (660 nm). This source is chopped at 90 Hz, eliminating stray light problems. Also available is a green light emitting diode source (570 nm).
bulletOPTICS:The LED source is mounted behind a small aperture which provides a near point source. This is collimated into a beam by a converging lens. An identical lens focuses the reflected beam into the collection aperture.
bulletVIEWING OPTICS: The detector can be rotated out of the reflected beam and the reflected image viewed through an eyepiece in the top of the instrument.
bulletALIGNMENT SYSTEM: Three threaded supports provide for adjustment to bring the reflected beam into alignment with the receiving optics and to compensate for different thicknesses of second surface reflectors.
bulletCALIBRATION STANDARD: A working standard is mounted in a protective housing that couples into the base of the instrument.
bulletRESOLUTION: A 3 digit LCD display indicates reflectance directly to 0.1%. A gain adjust knob allows the user to calibrate the instrument with the working standard.
bullet REPEATABILITY: +/- 0.002 reflectance units.
bulletOPERATING TEMPERATURE: 32 to 122 F (0 to 50 C).

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Last modified: 09/19/14