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UV-VIS Detector LCD 2084.2
Description
UV-VIS DETECTOR LCD 2084.2
is a processor version of a LCD 2083 detector with a wavelength range of 190 - 600 nm and a noise level ± 1.25 x 10-5 AU with an empty cell and with lot of new functions:
- A adjusted wavelength and sensitivity may be changed by a programme during an analysis.
- An informative scan may be performed during analysis in a selected portion of a spectrum.
- Thus obtained scan can be used for determination of an optimum wavelength for particular analysis, or for a check for purity of a peak.
- The individual programmes may be stored in a detector memory. All operations may be also performed in a manual mode.
- The detector performs automatic wavelength calibration after lamp has been switched on, and the switching off the lamp may also be pre-programmed after completion of analysis.
- The detector cell is replaceable from the side of the detector. A standard analytical cell, preparative cell, or microcell may be used according to the type of analysis.
- The start can be initiated either from a keyboard or with a switch on an injection valve.
Specification
| Wavelength range | 190 - 600 nm |
| Spectral half-width | 6 nm |
| Accuracy of adjustment | ± 1 nm |
| Reproducibility | ± 0.5 nm |
| Light source | Deuterium discharge lamp IST WL 24 198 |
| Noise level at empty cell (240 nm, TC 1 s) | ± 1,25 x 10-5 AU |
| Drift at empty cell (240 nm after 1 h) | 5 x 10-4 AU/hr |
| Materials in contact with mobile phase | PTFE; fused silica, stainless steel, Vespel, PEEK |
| Time constant | 5s, 1s and 0,2 s |
| Programming | up to 100 programmes with 11 steps |
| Programmable parameters: | wavelength, sensitivity, mark in a chromatogram, sample scanning, method of programme termination and possibility to switch the lamp off at the programme end |
| Maximum programme duration | 999 min |
| A/D converter | integration, 19 bits |
| Pattern frequency | 10 Hz normal operation, 80 Hz scan |
| D/A converter | output INT 20 bits, output REC 16 bits |
| Output for chart recorder | 10 mV |
| Adjustable offset | ± 50 mV |
| Output for integrator | 5 V/AU |
| Interface | RS 232 |
| Power supply | 230 V ± 10%, 50 Hz (115 V± 10%, 60 Hz) |
| Power input | 80 VA |
| Dimensions (W x H x D) | 260 x 160 x 450 mm |
| Weight | 12 kg |
Scanning:
| Wavelength range | selectable in the full range of the instrument |
| Step interval | selectable in the range 1 to 10 nm |
| Scan speed at 1 nm step | 50 nm/s |
| Scan speed at 10 nm step | 100 nm/s |
Important notice: Output signal of the detector is directly proportional to the optical path of the cell. The noise and drift levels are referred to the optical path of 10 mm, corresponding to the AU definition.
USED CELLS
Standard analytical measuring cell HPLC 04 supplied with the unit
| volume | 10 µl |
| optical path | 5 mm |
| diameters of capillaries | input 1/ 16“ x 0,2mm ; output 1/ 16“ x 0,5 mm |
MLCC 02 Microcell (optional)
| volume | 0,5 µl |
| optical path | 0,8 mm |
| diameters of capillaries | input 1/ 16“ x 0,2mm output 1/ 16“ x 0,2 mm |
PLCC 04/05 Preparative cell (optional)
| volume | (adjustable) 45 µl; 55 µl; 70 µl |
| optical path | (adjustable)0.3 mm; 1.4 mm; 2.4 mm |
| Connecting of PLCC 04 | SS capilaries 1/16" x 1,1mm |
| Connecting of PLCC 05 | FEP 1/8“ x 1/16“ |
Specification
