User Programs—Customized Analysis
5940018UserPrograms.fm Page 39
Section 5 User Programs—Customized Analysis
User Programs allow the addition of custom analyses to the DR/2400. Once the
calibration curve and other necessary information is entered, the DR/2400 will
store the custom program for later use. User Programs are helpful when there is
no Hach Program available, or for use of a different sample cell than the one
specified in the Hach Procedures manual for a particular test.
5.1 Creating and Saving a New User Program
3. The Edit User Program screen will appear. To edit an item shown on the
screen, highlight it by scrolling, then touch
Edit. Enter the following
information about the custom program:
1. From the Main Menu, touch
User Programs, then Program
Options
, then New Program.
2. Enter a new program number from 950 to 999. The lowest
available number will appear on the screen automatically. To
accept it, touch
OK.
Note: If a number is selected that is already in use for another User program,
the prompt Replace existing program? will appear. Touch OK to
overwrite the existing program, or touch Cancel to return to the previous
screen and select a different program number.
Highlighted User Programs
Component
Edit Action
Name
Enter a program name. The name may be from 11 to 19 characters long, depending on the
width of the characters.
Units Select from a list of 21 types of units.
Chemical Form 1
Enter a description of the chemical form. Subscripts and superscripts are available for
chemical notation.
Wavelength (Single
Wavelength User Programs)
Enter a numeric value for the wavelength. The wavelength must be between 365 nm and 880
nm.
Calibration
Define a calibration curve by either:
• Entering a calibration table with known values (See Section 5.1.1), or
• Reading a series of standards and letting the DR/2400 create the curve (See Section 5.1.2)
Make sure to select the correct units for the program before editing the Calibration.
Resolution Select the maximum number of digits to display after the decimal point.
Upper limit
If desired, enter the maximum value that the program will read. To turn the limit off, touch Edit,
then CE, then OK.
Lower limit
If desired, enter the minimum value that the program will read. The setting can be turned off
again in the same way as the Upper limit.
Timer 1
Timer 2
Timer 3
Timer 4
If desired, assign labels and durations for up to four timers. Highlight one of the timers and
touch Edit to begin. The check boxes on the left of the screen enable and disable the timers.
The next column of fields allows selection from a list of 7 timer labels. The third column allows
entry of the time duration for each active timer.
Chemical Form 2
Chemical Form 3
Chemical Form 4
If Chemical Form 1 is enabled, enter up to three alternate forms here. Highlight a form and
touch Edit. For each alternate form, use the check box on the left to enable or disable the form.
Then touch the field in the next column to enter a form. Finally, for the alternate forms, touch
the third column to enter a Factor. The DR/2400 will multiply the results of Chemical Form 1 by
the factor entered to arrive at a concentration for the alternate form.
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