ALTANA LCS III - Manual (Page 17)

16
Standard Operations
5.1.3 Main Menu
A variety of modes may be selected from the Main Menu. Table 2
briefly describes each menu option.
Table 2 Main Menu options
Option Function
Color Measurement
The COLOR MEASUREMENT mode is used to determine visual color values like Hazen,
Gardner, Saybolt as well as three-dimentional absolute colorimetric values like CIE Lab, Hunter
Lab or European Pharmacopoeia skale.
Color Difference
Measurement
The COLOR DIFFERENCE MEASUREMENT mode is used to determine a quantitative color
difference between a reference (R) and a sample (S) in the three-dimensional color space (CIE
L*a*b* or Hunter Lab). In this mode, an additional reference memory for up to 50 references is
available.
Photometry
SINGLE WAVELENGTH
Single wavelength measurements are:
Absorbance measurements: The light absorbed by the sample is measured in absorbance
units.
Transmittance measurements (%): The percentage of the light that passes through the sample
and reaches the detector is measured.
Concentration measurements: A concentration factor can be entered to enable the measured
absorbance values to be converted into concentration values.
MULTI WAVELENGTH
In the multi-wavelength mode, absorbance (Abs) or percentage transmittance (%T) is measured
at up to four wavelengths and absorbance differences and absorbance relationships are
calculated. Simple conversions into concentrations can also be carried out.
TIME COURSE
The time scan records the absorbance or % transmittance at a wavelength over a defined time.
WAVELENGTH SCAN
A wavelength scan shows how the light from a sample is absorbed over a defined wavelength
spectrum.This function can be used to determine the wavelength at which the maximum
absorbance value can be measured.The absorbance behavior is displayed graphically during the
scan.
System Checks
The system checks menu offers a number of options, including optical checks, output checks,
lamp history, instrument update, service time and instrument backup.
Recall Data Stored data can be recalled, filtered, sent to Printer, Memory stick or PC and deleted.
Instrument Setup
In this mode, user-specific or method-specific settings can be entered: Operator-ID, Sample-ID,
Date & Time, Display & Sound, Lamp Control, PC & Printer, Password and Select Color.