Hach DR 1900 Manuel D'utilisation De Base page 12

Program option
Multi Wavelength
Time Course
Select a stored program or LCK or TNTplus method
1. Push SETTINGS>All Programs/Methods.
2. Select Stored Programs/Methods or LCK or TNTplus methods.
3. Select an option to find a method or to add it to favorites.
Option
Select by number
Select by letter
Add to Favorites
4. Select the applicable method and push Start.
Select basic program options
When a program is selected, additional parameter options are available.
1. Push Options to access the option menu.
2. Select the applicable options.
Option
Start Timer
Operator ID
Sample ID
%T/Abs/Conc
Advanced
Options
Back
Select advanced program options
Every program has various additional advanced options from which to select.
12 English
Table 2 Program options (continued)
Description
In the Multi Wavelength mode, absorbance values can be measured at up to
four wavelengths. The results can be mathematically processed to get sums,
differences and relationships.
The time scan automatically records and shows the absorbance at a
wavelength in a specified time period.
Description
Search by number for a specific method.
Search by letter for a specific method.
Add the selected method and add it to favorites for faster access.
Description
Select a pre-set timer or set a manual timer to make sure that the steps of an analysis
are correctly timed (e.g., reaction times or wait times can be exactly specified). When the
timer is on, the timer icon is shown on the display. The instrument makes an audible
sound when the time is over. Pre-set timer—Push Start to start the timer. If a stored
program has more than one timed step, push Stop>Options>Select>Select to start the
next timer. Timer Manual—Enter the applicable time with the navigation keys and push
Done. Default = 03:00
The operator ID tag associates readings with an individual operator. Refer to
operator ID on page 14.
The sample ID tag is used to associate readings with a particular sample or with a
location. Refer to Use a sample ID
Switch to % transmittance, absorbance or concentration readings. Transmittance
reading (%)—Reads the percent of the original light that passes through the sample and
reaches the detector. Absorbance readings—The light absorbed by the sample is read
in absorbance units. Concentration readings—The measured absorbance values are
converted into concentration values with the program-specific stored equation.
Use the advanced options to specify more parameters. Refer to
program options on page 12.
Go back to the previous menu.
on page 14.
Use an
Select advanced