1 Introduction
This manual contains data concerning Spectral Evolution’s PSR Series field-
portable spectroradiometer systems (including PSR+3500, PSR-3000, PSR-2500, PSR-
1900). Each instrument in the PSR Series consists of a UV-VIS-NIR range spectrometer
coupled with an optional calibrated lens foreoptic or fiber optic cable. The complete
system collects and stores spectral data and produces output calibrated to units of
spectral radiance (W/m2/nm/sr). Energy enters the spectrometer from an external
illumination source by way of the lens or SMA fiber optic cable. The spectroradiometer
system operates in the range of 350–2500 nm with two or three detector elements: a
512-element silicon PDA covering the visible range and part of the near infrared (up to
1000nm) and one or two InGaAs arrays that extend detection into the NIR (to 1900 or
2500nm, depending on model).
All electronics controlling system operation are built in to the instrument.
Each system incorporates manual controls and on-board storage for self-contained field
operation, as well as the capability to connect to a host computer system using the
provided application software via USB or Bluetooth communications interface. The
instrument is powered by a Li-Ion battery pack (provided with each system)
All PSR Series spectrometer systems contain an internal microprocessor that
controls the data acquisition of the detector array, the communication interface to the
host PC, and provides data storage. Data stored consists of the calibration data in flash
memory, the current dark and reference scan data in RAM as well as the current
spectral scan data, also in RAM. The microprocessor also performs mathematical
functions on the scan data, such as dark subtraction and automatic integration setting.
All PSR Series spectroradiometers have a built in shutter for dark measurements.
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