Introduction This product is a new instrument designed to monitor the proportion of dual-beam optical system, has excellent optical performance, easy to use, is one of the essential instrument for laboratory analysis. Proportion of instrument characteristics ☆ excellent optical performance with a new dual-beam optical design of the monitoring system with excellent optical performance; performance blazed holographic grating ensure the instrument's low stray light. Fully functional ☆ 1) photometric measurements in a set of transmittance and absorbance at a wavelength; 2) spectroscopy, transmissivity, absorbance, transmittance, reflectance and the energy spectrum in the wavelength range of the scan, and various data processing such as peak detection, derivative operations, spectrum operations, etc.; 3) quantitative measurements to establish the K-factor method, linear regression equation method for quantitative determination of AC curve; 4) kinetic measurement wavelength arbitrarily set at at the time of the scan performed transmittance and absorbance can be a variety of data operations. 5) data output, can access data files and parameter files, the measurement results to the standard output format common data files. ☆ advanced circuit design and control system design of advanced circuit control system, the instrument has a high degree of stability and low noise. ☆ removable sample chamber with a sample room design removable structure, automatic four linked pools, easy to replace different accessories to meet different analytical needs. ☆ spacious open-source chamber design, the light source is more convenient to replace key components ☆ stable and reliable performance of the instrument are made of imported components, using imported deuterium lamp and imported photovoltaic cells, to ensure a stable and reliable equipment performance. ☆ powerful operating software development environment based on the windows operating software in English, provides a wealth of unique analysis capabilities, can host full control, including data collection (single point measurement, multi-point measurement, spectrum scanning, quantitation measured scan time), and various data processing. · Standardization, peak detection, area calculation · map zoom, smooth, TA quantitative determination of a single wavelength conversion · · K factor method, is working curve method, multi-point calibration curve method, can be 1 to 3 times a function fitting · Quantitative Analysis outliers excluded France · curve coefficient can be corrected Scanning map curve and test results can be mass storage · test reports in a standard file format output · The printer can choose ☆ large-screen display with a resolution of 320 * 240 6-inch LCD screen. Technical indicators Metering transmittance, absorbance, energy reflectance wavelength range of 190 nm ~ 1100 nm spectral bandwidth of 2nm stray light ≤0.05% T (220 nm, 360nm NaL solution) Wavelength Accuracy ± 0.3 nm Wavelength Repeatability 0.1nm Photometric Range -3 A ~ 3 A Photometric accuracy of ± 0.3% T (0 ~ 100% T) ± 0.002A (0 ~ 0.5A) ± 0.004A (0.5 ~ 1A) Photometric Repeatability 0.001 A (0 ~ 0.5 A) 0.002A (0.5 ~ 1A) derivative Resolution> 0.5 Stability ≤ ± 0.001A / h Noise ± 0.001 A baseline flatness ≤ ± 0.002A Power 85V ~ 265V, 50 / 60Hz