722 grating spectrophotometer

722 grating spectrophotometer using grating, with good optical properties; low-power light source, greatly reducing the operating temperature, reducing the adverse effects of temperature on the measurement; use the excellent performance of AD converters and use logarithmic transformation does not need to be corrected; this device is a practical, very strong, the test is accurate, easy to operate common analytical instrument; it is widely used in metallurgy, machinery, chemical, medical and health, clinical examination, biochemical, environmental protection production, teaching and research work in food, materials science and other fields, and is suitable for a variety of quantitative and qualitative analysis of substances. Instrument main technical indicators and specifications 1, wavelength range: 340-820nm 2, wavelength accuracy: ± 2nm 3, wavelength repeatability: <1nm 4, spectral bandwidth: 5nm 5, stray light: ≤0.6%; (T) (in at 360nm) 6, transmittance measurement range: 0-100% (T) 7, absorbance measurement range: 0-1.999 (A) 8, the concentration of direct reading range: 0-19999, reading accuracy: Transmittance accuracy: ≤ 1% (T) absorbance accuracy: ≤ ± 0.004A (at 0.5A at) 10, Transmittance Repeatability: <0.5% (T) 11, light source: 12V30W (long life tungsten halogen lamps) 12, dispersive element: flat grating 1200 lines / mm