Hach-Lange DR 5000 brewerie analysis, supplementary software LZV570 - Manual (Page 24)

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Working procedures
2.6.1 Procedure for measuring free amino nitrogen (FAN) in light worts
1. Prepare three blank value solutions, three standard solutions
and three samples as described in the working procedure.
2. Select STORED PROGRAMS in the “Main Menu”. Select test
number 807 .
3. Insert zero value solution (distilled water) into the cell
compartment, close the cover and touch ZERO .
4. Insert blank value cuvette (see sample preparation) into the cell
compartment. Close the cell compartment. Touch READ .
Display: E1.
Note: Repeat the procedure with blank value cuvettes 2 and 3.
Display: E2 and E3.
5. Insert standard cuvette (see sample preparation) into the cell
compartment. Close the cell compartment. Touch READ .
Display: E4.
Note: Repeat the procedure with standard cuvettes 2 and 3. Display:
E5 and E6.
6. Insert the sample cuvette with the first prepared sample into the
cell compartment. Close the cell compartment. Touch READ .
Display: E7.
Note: Repeat the procedure with sample cuvettes 2 and 3. Display: E8
and then, after the final measurement, the result.
7. The FAN result is displayed in mg/l.
Note: Analysis of additional samples: Repeat working procedure from
point 6.
2.6.1.1 Executing the test with the sipper module
Information about the installation, module configurations and
sample introduction of the sipper module can be found in the user
manual of the DR 5000 Spectrophotometer (15.3.3. Installation
Sipper Module, page 133).