The HiStar absorption measurement incorporates a reflective flow-through sample chamber designed to collect and propagate the scattered light to the receiver optics. The attenuation measurement incorporates conventional transmissometer optics. The absorption and attenuation receivers consist of primary collection optics that couple the light into separate spectrometers via fiber optical cables. A novel optical switching arrangement allows the same spectrometer used to measure the signal to also monitor the light source, as well as the dark current of the system. This powerful arrangement contributes significantly to maintaining operational instrument stability over time and a wide range of temperatures.
Specifications are subject to change without notice.
HiStar 1. Specifications 2. Theory of Operation 3. Setup and Operation Connectors Instrument Description Common Requirements 4. Optics Water Calibration Precision Electronics Profiling in situ Absolute Calibration 5. C. Determining Voltage Loss in Cable . .