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Standard Operations
5.1.3 Main Menu
A variety of modes may be selected from the Main Menu. The
following table briefly describes each menu option.
Table 2 Main Menu options
Option Function
Stored Programs (HACH
LANGE Programs)
Stored programs are pre-programmed methods that make use of HACH reagents and LANGE
cuvette tests and pipette tests.
The DR 5000 Procedures Manual contains illustrated, step-by-step procedures for analyses
using HACH programs. The working procedures for LANGE tests are included in the test packs.
User Programs
User 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. The LANGE tests can
then be modified to suit the user's requirements.
Favorite Programs List of methods/tests created by the user to suit his own requirements.
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.
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.
Time Course The time scan records the absorbance or % transmittance at a wavelength over a defined time.
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 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 Module Options.