Firma:              Shimadzu

Modell:                         UV 240

Kommentar:     Dokumente engl.

Specifications

Wavelength Range                              190~900nm

Light Source                                       50W halogen lamp (2000 hrs" life) and deuterium lamp (alignment free socket type)

Light Source Changeover                   Automatic mirror changeover linked with the      wavelength, and automatic turning-on of lamp according to the wave length range selected. The                            changeover wavelength can be selected in a range from 295nm to 364nm.

Monochromator                                 Aberration-corrected Czerny-Turner mounting with a    blazed holographic grating.

Spectral Bandwidth                            Variable from 0.008nm to 5nm in 0.001nm steps.

Resolution                                          Better than 0.15nm

Stray Light                                         Less than 0.05%T at 340nm (UV-39 filter)

                                                         Less than 0.05%T at 220nm (Nal, 10g/l)

Wavelength Readout                          4-digit LED, readable to 0.1nm

Wavelength Accuracy                       ±0.3nm with automatic wavelength correction.

Wavelength Reproducibility               ±0.1nm*

Detector                                           Photomultiplier R-928-05

Photometric System                          Double-beam, direct ratio recording system by dynode   feedback.

Recorder                                          Computer-controlled digital recorder of thermal graphic printer type

Chart Paper                                      Temperature-sensitive rolled chart paper, 170mm in        effective width, A4 size, ruled in Abscissa and Ordinate                                                        scales. Non-ruled paper is optionally available.

Recording Mode                              1. Recording of spectral curves and time-course change of photometric value, by solid line or three types of broken lines.

                                                      2. Printout of photometric values with sample numbers (2 figures).

                                                      3. Drawing of format, which includes printout of instru­mental parameters and drawing of X and Y axes with main numerical values.

Repetitive Scanning                            Selectable between OVERLAY mode and        SEQUENTIAL mode. Cycle time is selectable from 0             to 100 minutes. The number of repetition is selectable             from 1 to 100 times.

Photometric Range                             l.    Display:                      4-digit LED and negative sign              Transmittance:   0.00~160.0%T.

                                                                                               0.01% division (below 100%T)

                                                              Absorbance:               -0.200~3.999 Abs. (0.001 Abs.division)                    Energy: Arbitrary unit

                                                         2.   Recorder:                   Upper and lower limits of the full                                 scale are digitally set in 0.1%T or                                                                       0.001 Abs.increments.

                                                              Effective full scale is:

                                                                                               1~160%T in %T Range

                                                                                               -0.200~4 Abs. in Abs. Range

                                                              Selectable range is:

                                                                                               -1000~+1000%T in 0.001%T                                   steps

                                                                                               -9.999~+9.999Abs. in 0.001Abs.                              steps

Photometric Accuracy                        ±0.002 Abs. in 0~0.5 Abs.   \         inspected with

                                                         ±0.004 Abs. in 0.5~1.0 Abs.>      NBS 930

                                                         ±0.3%T in 0~100%T            /       standard filters.

Drift                                                   Less than 0.0004 Abs/h (after 2 hr. worm-up)

Wavelength Setting                             Starting and ending wavelengths are both set digitally.

                                                         The “GO TO λ” key is provided to move the wavelength           to a desired position by one-touch operation.   Wavelength can be set in 0.1nm steps.

Quantitative Calculation Mode            l.   Automatic concentration calculation by the least square calibration system and printout of the results.

                                                         2. Calculation of data obtained from two/three wave­lengths, and printout of the results.

Scanning Speed                                  4-step selection, FAST, M (medium), SLOW, and ACC          (accumulation). The built-in automatic scanning speed sup­pression system ensures distortion-free spectra            irrespective of the scanning speed selected.

Wavelength Scale Expansion              Five steps of 2.5, 5, 10, 20, 40nm/cm

Baseline Correction                            Automatically corrected by the built-in baseline memory at the initializing period. A correction

                                                         command key is incorporated for later correction.

Baseline Flatness                                ±0.001 Abs. for 195~860nm with 2nm slit width

(excluding noise)                                 ±0.001 Abs. for 190~900nm with 5nm slit width.

                                                           In order to test baseline flatness both memorize and      record at slow scan speed.

Response                                           Automatically adjusted according to the slit width.

Auto-Zero Adjustment                       One-touch operation by the “ABS 0 100%T” key

Sample Compartment                         Maximum optical path length for cell: 100mm

                                                         Cartridge system for easy mounting and dismounting      and washing.

                                                         A standard cell holder for a pair of l0mm square cells     (for sample and reference beams) is attached.

                                                         Effective inner space: 110mm wide (in optical path         direction), 230mm deep and 170mm high.

Power Requirements                          100, 115, 220 and 240V, selectable by line voltage       Selection switch: 50/60Hz, 300VA

External Dimensions                           Spectrophotometer main body: 480mm wide, 560mm   deep and 190mm high

                                                         Graphic printer: 400mm wide, 520mm deep and            170mm high

Weight                                               Spectrophotometer main body: 32kg

                                                         Graphic printer: 13kg

*Note: The wavelength reproducibility is inspected using “GO TO λ“ key from longer wave­lengths.