Select A Favorite Or A User Program; Add A Program To Favorites; User Programs - Hach DR 900 Manual Del Usuario

8. Prepare the sample. Add reagents as specified by the method
document.
9. Select Options>Start Timer to use the stored timers within the
program.
10. Close the sample cell and clean the optical surfaces of the cell with a
lint-free cloth
11. Insert the sample into the cell compartment. Make sure to install the
sample cell in the correct and in a consistent orientation so that the
results are more repeatable and precise. Refer to
on page 8.
12. Close the instrument cap to prevent light interferences. Refer to
Figure 5 on page 8.
13. Push Read. The display shows the results in the selected units.
Note: The display shows "+++" or "---" if the measured absorbance is less or
more than the calibration range of the test.
6.5 Data log
The data log shows all saved readings. Push HOME>Options>Data
Log to see the readings. Refer to
information about the data log export.
Section 7 Advanced operation

7.1 Select a favorite or a user program

The favorite and user programs database is empty when the instrument
is started for the first time. A method can be saved in the favorites for
faster access. A user program can be programmed for specific needs.
1. Push HOME>Options>Favorites/User Programs>Select.
2. Push New Program to make a new user program. Refer to
programs on page 13.
4
If the curve is known to be linear, only two concentration data points (e.g., a standard with zero absorbance and another known standard) are
necessary. Use additional data points to confirm linearity or define a nonlinear curve.
Figure 4
Export the data log on page 16 for
User

7.2 Add a program to favorites

Stored programs and user programs methods which are often used can
be saved in the favorites list.
1. Select HOME>Options>All Programs.
2. Select the applicable method and push Start.
3. Select Options>Add to Favorites to add the selected method to
favorites.

7.3 User programs

The user programs database is empty when the instrument is started for
the first time. Use New Program to make new programs for specific
needs. To make a new user program, do the steps that follow.
1. Push HOME>Options>Favorites/User Programs>Select>New
Program.
2. Select an available program number from 1001 to 1010.
Note: A maximum of ten programs (user programs and/or favorites) can be
saved.
3. Enter a method name (up to 12 characters).
4. Select the wavelength: 420, 520, 560 or 610 nm.
5. Select the unit: None, µg/L, mg/L or g/L.
6. Select the resolution: 0000, 000.0, 00.00 or 0.000.
7. Add the calibration points: a minimum of 2 and a maximum of
4
12 calibration points. Select Edit Std 1 and enter the first standard
concentration value. Push Done.
Note: A beep means that the concentration is a duplicate of a previously
entered standard or the concentration is too high for the selected resolution.
Enter a different value and continue.
English 13