biochrom Libra S21, User Manual

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Libra S21/S22, English Issue 02 - 04/2004
OPERATION
Introduction
Your spectrophotometer is a stand alone, simple-to-use instrument with a high-
resolution liquid crystal display (LCD), and a comprehensive range of
spectrophotometry measurements can be undertaken.
It works on the basis of light from the xenon lamp being directed by a fixed mirror
through the monochromator inlet slit. This passes through one of several (dependent
on wavelength selected) filters mounted on filter quadrant: the filtered light is then
directed onto the holographic grating which produces light of the selected
wavelength. The light then leaves the monochromator via the exit slit, and mirrors
focus and direct the light into the sample compartment. This passes through your
cell, containing the sample of interest, and then a defocusing lens to a solid state
detector unit. The resulting signal is then filtered and displayed.
Your spectrophotometer has the following capabilities:
•
Basic Modes for
- Absorbance
- % Transmission
- Factor Concentration
- Absorbance Ratio
•
Application Modes for
-
Wavescan (Wavelength Scanning )
- Simple Kinetics
- Reaction Rate
- Standard Curve
- Multiple Wavelength (Multi Wavelength Equation Entry)
•
18 user defined methods, in 3 groups of 6
-
Methods A, B, C
•
Print results from the instrument display in graphical format
•
Download of results directly to Excel for manipulation and archiving, via a
serial interface lead to a PC
•
Self test diagnostics for GLP purposes
A range of accessories further enhances the capability of the instrument.
The home page provides access to user modes, system utilities and accessory
identification and set-up.