■Technical indicators and basic parameters

*Wavelength range: 190～900nm

*Spectral bandwidth: 0.1, 0.2, 0.5, 1.0, 2.0nm (5 levels)

*Wavelength accuracy: ±0.3nm

*Wavelength reproducibility: 0.1nm

*Transmittance accuracy: ± 0.3% τ (0-100% τ)

±0.002A(0～0.5A)

±0.004A(0.5～1A)

*Transmission density repeatability: 0.1% τ (0-0.5A)

*Measurement methods: transmittance, absorbance, concentration, energy, reflection

*Luminous range: - 4～4A

*Stray light: ≤ 0.01% τ (220nm NaI solution, 340nm NaNO2)

*Baseline straightness: ±0.001A

*Stability: 0.0004A/h (after preheating at 500nm)

*Detector: Imported photomultiplier tube

*Light source: imported deuterium lamp, imported tungsten lamp

*Power supply: AC：220V/50Hz

*Power: 400W

*Instrument size: 670×470×210mm

*Host weight: 45kg

■Instrument characteristics

This instrument is a dual beam fully automatic scanning ultraviolet/visible spectrophotometer.

*Software: In the Windows 98/me/xp environment, it is a Chinese software that facilitates human-machine dialogue.

*Spectral scanning: can scan the spectral characteristics of samples within any wavelength range of 190-900nm;

The minimum sampling interval for wavelength is 0.04nm, and the scanning speed is divided into fast, medium, and slow; It can perform differentiation, peak valley detection, curve smoothing, spectrum extension, spectrum superposition, and spectrum calculation on spectral curves.

*Fixed wavelength measurement: 10 wavelength points can be set simultaneously, and can be expanded according to user needs.

*Quantitative analysis: Standard coefficient method, standard control method, dual wavelength method, three wavelength method and other analytical methods can be applied.

*Dynamics measurement: wavelength points and sampling intervals can be selected for activity calculation, and DNA protein measurement can be performed

*Computer and Print Output System:

*Printer: Supports various types of printers to output data and graphs.