26Standard programs5.1.3 Main menuA variety of modes may be selected from the Main Menu. Thefollowing table briefly describes each menu option.There is a toolbar on the right-hand side of the screen. Press toactivate the various functions.Table 2 Main Menu optionsOption FunctionStored Programs /Barcode Programs(HACH-LANGE programs)Stored programs are pre-programmed methods that make use of HACH chemicals andHACH-LANGE pipette tests.The working procedures for HACH-LANGE tests are included in the test packs.Further information, as well as illustrated, step-by-step process instructions foranalyses using HACH programs, are available on the website of the manufacturer.User ProgramsUser programs make "made to measure analysis" possible:• Users can program methods they have developed themselves• Existing HACH and LANGE methods can be stored as user programs. TheHACH-LANGE tests can then be modified to suit the user's requirements.Favorites List of methods/tests created by the user to suit his own requirements.Single WavelengthSingle wavelength readings are:Absorbance readings: The light absorbed by the sample is measured in absorbance units.Transmittance reading (%): Measures the percent of the original light that passes through thesample and reaches the detector.Concentration readings: A concentration factor can be entered to enable the measuredabsorbance values to be converted into concentration values.Multi WavelengthIn the Multi Wavelength mode, absorbance (Abs) or percentage transmittance (%T) ismeasured at up to four wavelengths and absorbance differences and absorbance relationshipsare calculated. Simple conversions into concentrations can also be carried out.Wavelength ScanA wavelength scan shows how the light from a sample is absorbed over a defined wavelengthspectrum. This function can be used to determine the wavelength at which the maximumabsorbance value can be measured. The absorbance behavior is displayed graphically duringthe scan.Time course The time scan records the absorbance or % transmittance at a wavelength over a definedtime.System checksThe "System check" menu offers a number of options, including optical checks, output checks,lamp history, instrument update, service time, settings for analytical quality assurance andinstrument backup.Recall measurement data Stored data can be called up, filtered, sent and deleted.Instrument Setup In this mode, user-specific or method-specific settings can be entered: operator ID, sample ID,date & time, sound, PC & printer, password, energy-saving mode and stored data.
