UV-1900

Item	Specification
Wavelength range	190 to 1,100 nm
Spectral bandwidth	1 nm (190 to 1,100 nm)
Wavelength display	0.1nm increments
Wavelength setting	0.1nm increments (1nm increments when setting scanning range)
Wavelength accuracy	± 0.05 nm at D2 peak 656.1 nm, ± 0.3 nm for entire range
Wavelength repeatability	± 0.1 nm
Wavelength slew rate	About 14,500 nm/min
Wavelength scanning speed	3,000 to 2 nm/min
Lamp interchange wavelength	Automatic interchange linked to wavelength. The interchange wavelength can be set freely in the range of 295 to 364 nm (0.1nm increments).
Stray light	Less than 0.02% at 220 nm (NaI) Less than 0.01% at 340 nm (NaNO2) Less than 0.5% at 198 nm (KCl)
Photometric system	Double beam optics
Photometric range	Absorbance: -4 to 4 Abs Transmittance: 0% to 400%
Photometric accuracy	± 0.002 Abs at 0.5 Abs ± 0.0025 Abs at 1.0 Abs ± 0.006 Abs at 2.0 Abs (measured using NIST930D/NIST1930 or equivalent.)
Photometric repeatability	Less than ± 0.0001 Abs at 0.5 Abs Less than ± 0.0001 Abs at 1 Abs Less than ± 0.0005 Abs at 2 Abs

Item	Specification
Baseline stability	Less than 0.0003Abs/hr (700 nm, one hour after light source turned ON)
Baseline flatness	Less than ± 0.0006 Abs (1,100 to 190 nm, one hour after light source turned ON)
Noise level	Less than 0.00003 Abs (700 nm)
Light source	20-W halogen lamp and deuterium lamp Built-in light source auto position adjustment
Monochromator	LO-RAY-LIGH grade blazed holographic grating in Czerny-Turner mounting
Detector	Silicon photodiode
Sample compartment	Internal dimensions: W110 × D250 × H115 mm Distance between light beams: 100 mm
Power requirements	AC100,120,220,230,240 V, 50/60 Hz, 140 VA
Environmental requirements	Temperature: 15°C to 35°C Humidity: 30% to 80% (without condensation; 70% max. at 30°C or higher)
Dimensions	W450 × D501 × H244 mm
Weight	16.6 kg
Output device	USB memory (optional)
Output device	Data files saved in text format or UVPC format. UVPC-format files can be read directly by UVProbe and LabSolutionsTM UV-Vis.
PC compatibility	UVProbe software (standard) LabSolutions UV-Vis software (optional) External control possible via USB.
Display	24-bit color touch screen
Supported languages	Japanese, English, Chinese, Spanish (Mexico), Portuguese (Brazil).

Measurement mode	Specification
Photometric mode	Single-wavelength measurement Photometric modes: T% or Abs Quantitation using K-factor method Data table storage and recall functions Multiple-wavelength measurement Photometric modes: T% or ABS Measurements at up to eight designated wavelengths (set in 0.1mm increments) Data calculation at up to four wavelengths (difference or ratio between two wavelengths, calculation between three wavelength, etc.) is possible.
Spectrum mode	Measurement modes: ABS, T%, E Number of repeat scans: 1 to 99 Recording system: Selection between single spectrum and data overlay 4.Data storage and recall 5.Data processing: Peak/valley detection, arithmetic operations, differentiation, smoothing, area calculation, point picking, data reading at cursor-specified point
Quantitation mode	Measurement methods: wavelength, wavelength, wavelength, and 1st to 4th derivative methods Quantitation methods: Automatic concentration calculation using K-factor Automatic concentration calculation using single-point calibration curve Multi-point calibration curve method (1st to 3rd order regression curves) Measurement parameters: Number of standards (2 to 10) Number of repeat measurements (1 to 10 times) to obtain a mean value for quantitation.
Kinetics mode	Measures absorbance changes as a function of time and calculates the enzymatic activity values. Measurement time: 1 to 9,999 sec/min Measurement methods: wavelength, wavelength, multi-cell, and rate measurements
Time scan mode	Measures changes in measured values as a function of time. Measurement mode: ABS, T%, E Measurement time: 1 to 9,999 sec/min Data processing functions (same as spectrum mode)

Measurement mode	Specification
Biomethod mode	DNA/Protein Quantitation Calculation of DNA/protein concentration and absorbance ratio DNA concentration = K1 x A1 - K2 x A2 Protein concentration = K3 x A2 - K4 x A1 Factors and measurement wavelengths can be set freely. Background correction is possible. Quantitation of proteins Quantitation methods: Lowry method, BCA method, Biuret method, CBB method (Bradford method), UV method
Maintenance	Baseline correction Lamp usage time displays and reset Security settings Functions can be restricted according to the user. Instrument validation functions: Compatible with 9 JIS items Wavelength accuracy, wavelength repeatability, resolution, stray light, photometric accuracy, photometric repeatability, baseline flatness, baseline stability, noise level. Semi-automatic validation Validation inspections conducted interactively while inserting and removing inspection jigs. Fully automatic validation Automatic validation inspections from measurement to evaluation and printout. Setting inspection parameters and pass/fail criteria Authority to make changes can be protected by password access. Detailed printout of results Bulk printout of results
Shared functions	Automatic setting of measurement mode after instrument initialization. It’s possible to specify standby and parameter files in the parameter setting window for each measurement mode. Selection of the displayed number of decimal places Absorbance: 3 or 4 decimal places Transmittance: 1 or 2 decimal places Number of files that can be saved (built-in memory) Measurement parameters: 24 files max. Data: 8 files max. Tabular data: 8 files max. The setting of integration time (for fixed-wavelength measurement) PC control Spectrophotometer can be controlled by an external PC. This function is also used when performing the operation with the UVProbe software provided. *A USB cable is required.