Hach DR 3900 Manuel D'utilisation De Base page 116

Table 2 Main Menu options
Option Function
Stored programs are pre-programmed methods that make
Stored
use of HACH chemicals and HACH-LANGE pipette tests.
Programs /
The working procedures for HACH-LANGE tests are included
Barcode
in the test packs.
Programs
Further information, as well as illustrated, step-by-step pro-
(HACH-LANGE
cess instructions for analyses using HACH programs, are
programs)
available on the website of the manufacturer.
User programs make "made to measure analysis" possible:
• Users can program methods they have developed
themselves
User Programs
• Existing HACH and LANGE methods can be stored as
user programs. The HACH-LANGE tests can then be
modified to suit the user's requirements.
List of methods/tests created by the user to suit his own
Favorites
requirements.
Single wavelength readings are:
Absorbance readings: The light absorbed by the sample is
measured in absorbance units.
Transmittance reading (%): Measures the percent of the
Single
original light that passes through the sample and reaches the
Wavelength
detector.
Concentration readings: A concentration factor can be
entered to enable the measured absorbance values to be
converted into concentration values.
In the Multi Wavelength mode, absorbance (Abs) or
percentage transmittance (%T) is measured at up to four
Multi
wavelengths and absorbance differences and absorbance
Wavelength
relationships are calculated. Simple conversions into
concentrations can also be carried out.
A wavelength scan shows how the light from a sample is
absorbed over a defined wavelength spectrum. This function
Wavelength can be used to determine the wavelength at which the
Scan maximum absorbance value can be measured. The
absorbance behavior is displayed graphically during the
scan.
The time scan records the absorbance or % transmittance at
Time course
a wavelength over a defined time.
Table 2 Main Menu options
Option Function
The "System check" menu offers a number of options,
including optical checks, output checks, lamp history,
System checks
instrument update, service time, settings for analytical
quality assurance and instrument backup.
Recall
measurement Stored data can be called up, filtered, sent and deleted.
data
In this mode, user-specific or method-specific settings can be
Instrument
entered: operator ID, sample ID, date & time, sound, PC &
Setup
printer, password, energy-saving mode and stored data.
Save, recall, send and delete data
The data log
The data log can store up to 2000 readings saved by the following
programs:
• Stored Programs,
• Barcode Programs,
• User programs,
• Favorites,
• Single Wavelength and
• Multi Wavelength.
A complete record of the analysis is stored, including the Date, Time,
Results, Sample ID and Operator ID.
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