Use An Operator Id; Use A Sample Id; How To Do A Measurement - Hach DR 900 Manual Del Usuario

Option Description
Reagent The Reagent Blank correction can be used with
Blank some of the factory-installed methods. Enter the
result of a completed test using deionized water as
the sample. The blank value is subtracted from
every result to correct for any background color due
to reagents. Enter the blank correction before the
Standard Adjust option is used. Complete this
correction for each new lot of test reagents.
Standard Change stored calibration. Complete a test on a
Adjust known standard at a concentration near the top of
the test range. Use this function to adjust the result
to align the standard concentration.
Sort Select an alphabetical or numerical program order
Program for the stored program list.

6.2 Use an operator ID

The operator ID tag associates readings with an individual operator. All
stored data will include this ID.
1. Push SETTINGS>Operator ID in the reading screen.
2. Select, create or delete an operator ID:
Option Description
Current ID Select an ID from a list. The current ID will be
associated with the sample data until a different ID
is selected.
Create New ID Enter a name for a new operator ID. A maximum
of 10 names can be entered.
Delete ID Erase an existing operator ID.

6.3 Use a sample ID

The sample ID tag is used to associate readings with a particular sample
or with a location. If assigned, stored data will include this ID.
12 English
1. Push SETTINGS>Sample ID in the reading screen.
2. Select, create or delete an operator ID:
Option Description
Current ID Select an ID from a list. The current ID will be
associated with the sample data until a different ID
is selected.
Create New Enter a name for a new sample ID. A maximum of
ID 10 names can be entered. The samples are
numbered in sequence for each measurement until
a different ID is selected (e.g., Pond 1, Pond 2).
Delete ID Erase an existing sample ID.

6.4 How to do a measurement

Basic measurement steps are necessary to complete a measurement.
Every method has a step-by-step procedure. Refer to the applicable
method to run a specific test. The example that follows is a basic
procedure to complete a measurement.
1. Select the applicable program from the programs menu (e.g., Stored
Programs, User Programs, Favorites).
2. Install the cell adapter, if necessary.
3. Push Start to start the program.
4. Prepare the blank according to the method document. Close the
sample cell and clean the optical faces of the sample cell with a lint-
free cloth.
5. Insert the blank sample cell into the cell compartment. Make sure to
install the blank sample cell in the correct and in a consistent
orientation so that the results are more repeatable and precise. Refer
to Figure 4 on page 8.
6. Close the instrument cap to prevent light interferences. Refer to
Figure 5 on page 8.
7. Push Zero. The display shows a concentration of zero (e.g., mg/L,
ABS, µg/L).