Hach-Lange DR 3900 Basic User Manual - Manual (Page 113)

English 113
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.
Table 2 Main Menu options
Option Function
Stored
Programs /
Barcode
Programs
(HACH-LANGE
programs)
Stored programs are pre-programmed methods that make
use of HACH chemicals and HACH-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 pro-
cess instructions for analyses using HACH programs, are
available on the website of the manufacturer.
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 HACH-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
Wavelength
Single 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 the sample and reaches the
detector.
Concentration readings: 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 check" menu offers a number of options,
including optical checks, output checks, lamp history,
instrument update, service time, settings for analytical
quality assurance and instrument 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.
Table 2 Main Menu options
Option Function