Hach Programs—Simplified Analysis
5940018HachPrograms.fm Page 33
Section 3 Hach Programs—Simplified Analysis
The DR/2400 Portable Spectrophotometer contains more than 120 programmed
procedures accessible through the Hach Programs menu.
3.1 Selecting a Hach Program
3.2 Running a Hach Program
After a program is selected, the screen for that parameter will appear.
Wavelength selection is automatic.
Follow the chemical procedures described in the DR/2400 Procedures Manual.
3.3 Using Program Timers
Some Hach procedures do not require the use of timers. Other Hach procedures
require several timers.
By default, the timer displays large numbers as it counts down. Touch
Close to
view the Hach Program screen while the timer is running.
A general purpose timer is also available in many programs. Touch the timer
icon and select
General Timer, then enter the length of the timed interval.
3.4 Taking a Reading
After preparing the samples according to the Procedures Manual, place the
sample cell into the instrument. Touch
Read.
• If the instrument is set so that Display Lock is off, the instrument will take
readings continuously after the instrument is set to zero.
• If Display Lock is on, touch Read to obtain a sample reading.
• To see an alphabetical list of Hach programs with program
numbers, touch
Hach Programs in the Main Menu.
• To select a specific program number, touch Select by Number.
Enter the program number (listed in the procedures manual)
and touch
OK.
• To move quickly through the list, use the scroll bar to move up
or down. When the selection is highlighted, touch
Start.
Touch the timer icon when prompted by the Procedures Manual.
Choose the appropriate timer from the Timers screen and touch
Start. The timer will count down on the screen. If necessary, cancel
the timer midway through the countdown by touching Cancel.
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