4
Performance
To ensure that the instrument is working within its specification, especially when making
measurements of an important nature, carry out performance checks with particular reference to
wavelength and absorbance accuracy. Performance checks are detailed in this manual.
Radio Interference
For compliance with the EMC standards referred to in the EC Declaration of Conformity, it is
necessary that only shielded cables are used when connecting the instrument to computers and
accessories.
Introduction
The UNICO S1205 is single beam, general purpose instruments designed to meet the needs of
the Conventional Laboratory, They are ideal for various applications, such as: Clinical
Chemistry, Biochemistry, Petrochemistry, Environmental Protection, Food and Beverage Labs,
Water and Waste Water Labs and other fields of quality control and research.
Both S1205 features a digital display of photometric result, easy operation and wavelength range
of 325nm to 1000nm, the instrument is ideal for measurements in the visible wavelength region
of the electromagnetic spectrum.
Working Principle
The spectrophotometer consists of five parts: 1) Halogen lamp to supply the light; 2) A
Monochromator to isolate the wavelength of interest and eliminate the unwanted second order
radiation; 3) A sample compartment to accommodate the sample solution; 4) A detector to
receive the transmitted light and convert it to an electrical signal; and 5) A digital display to
indicate absorbance or transmittance. The block diagram below illustrates the relationship
between these parts.
Block diagram for the Spectrophotometer
In your spectrophotometer, light from the lamp is focused on the entrance slit of the
monochromator where the collimating mirror directs the beam onto the grating. The grating
To Next Page
Loading...
Need help?
General
