Firma:                Rayleigh

Modell:              VIS 723G

Kommentar:      Dokumente engl.

VIS-723G is an all-purpose UV-VIS spectrophotometer with scan function. lt is widely used in medicine, environmental monitoring, commodity inspection, food inspection, agricultural chemistry, teaching in Colleges and universities, metallurgy, geology, machine manufacturing, and petrochemical industries, and is a helpful tool for analysts to carry out qualitative and quantitative analysis of materials.

The main features of the VIS-723G are as follows:

ü   Fully autornated operations: automatic filier changing; automatic wavelength calibration; automatic zero and 100%T adjustment.

ü   Automatic peak-picking; easy operations for replacing W lamp.

Friendly interface; abundant operation prompts; convenient and fast operations.

ü   Blue LCD display modale with 320x240 large screen.

ü   Economical embedded single-Chip micro-processor control system.

ü   Rich and powerful functions:

I.    Five basic measurement modest WL Scan (A, T, E), Photornetric measurement (Fixed

WL measurement, A, T), Quantitation (Concentration Measurement, A, C), Time Scan (Kinetics Measurement, A, T), Real Time Measurement (A, T, C, E);

II.   powerful Spectrum processing functions: Spectrum Save, Spectrum Load, Peak-Valley

Pick, Derivative Spectrum, Data Printing at Intervall, Activity Calculation, Cursor Locating, Spectrum Zooming, A-T Conversion, Spectrum Printing;

III.   Data processing functions: data saue, data looking up, data deleting and data printing,

     etc.;

IV. Cell error can be corrected;

V.   Parameters can be saved for later use after tUrning off the Instrument;

Vl. Spectrum and data can be stored when sudden power failure occurs;

VII.   Spectrum and data can be sent to Computer via RS-232 interface.

Specifications

Basic parameters of instrument

Wavelength range                     320 ~ 1100 nm

Range of transmittance (%T)    0%T ~ 200%T

Range of absorbance (Abs)      -0.301 A ~ 3.000A

Spectral bandwidth                    2nm

Minimum sampling interval        0.1 nm

Energy range                             0.000V ~ 9.999V

Main specifications

Wavelength accuracy               ±0.5 nm

Wavelength reproducibility        0.2nm

Stray light                                   ≤0.1 % T (Nal , at 220nm)

Photometrie accuracy               ±0.5%T (0%T ~ 100%T)

                                                  ±0.002A (0~0.5A )

                                                  ±0.004A (0.5A~1A)

Photometrie reproducibility        0.2%T

Baselire flatness                        ±0.002A

Drift                                            ≤0.001 A/h (at 500nm; after preheated)

Main Functions

1. Self-diagnosis function.

The instrument can automatically recognise most errors (including Operation error) and gives out prompts or alarms.

2.    Parameters can be saved.

The instrument saves the user-set parameters automatically. The saved parameters will not be lost after power is turned Off.

3.    Wavelength Scan measurement (WL Scan)

a)    Maximum sample collection points: 4000

b)    Minimum sai-npliiig interval: O.Iiiiii

c)    Maximum Scanning speed: 1000nm/iiiiii(inaxiiiitiinmovingspeed:3000iim/i-nl'n)

4.    Fixed wavelength measurement (Photometrie Measurement)

a)   Maximum of nine wavelengths can be measured at one time.

b)   Cell matching error can be corrected.

5.    Quantitative Measurement (Quartnation)

a)   Linear regression wich least square inethod. Up to 9 Standard Samples can be input.

b)   Factors of calibration curve can be input directly to obtain concentration value.

c)   Adjust decimal numbers automatically according to concentration range to ensure correct relative deviation.

d)    Cell matching error can be deducted.

6.   Kinetics measurement (Time scan)

       a) Time range: 0 — 6000 sec. (min)

       b) Minimum sampling time-interval:             0.1 sec.

       c) Maximum Sample collection points: 4000

       d) Cell matching error can be deducted.

7.   Real Time Measurement

       a) Always in measuring state; T, A, C, E are refreshed at the saure time.

       b) lilputwaveleiigtlivaltiedirectlytocliaiigewavelengtliasyouwisli.

       c) Real-time data can be printed out.

8.   Data Process (Photometrie Measurement, Quantitation)

       a) Data Lookup

       b) Data Delete

       c) Data Print

9.   Spectrum Process (Time Scan, WL Scan)

       a) Save and load spectrum

       b) Spectrum zoom and conversion

       c) Cursor locating

       d) Activity calculation (kinetics spectrum)

       e) Peak-valley pick and derivative spectrum

       f) Print out spectrum curve and print data at intervals

10. System setting

       a) Set initial wavelength and the state of the buzzer;

       b) Printer type can be selected

       c) Re-initialisation can be dorre to calibrate the Instrument.