Hach-Lange DR 5000 brewerie analysis, supplementary software LZV570 - Manual (Page 10)

10
Working procedures
Results
Bitter units (BU) without any decimal places
Accuracy
r = -0.36 + 0.05 m
R = 0.72 + 0.14 m
Standard values
Beer: 10–40 BU, depending on type and origin
Wort: 20–60 BU, depending on beer and utilisation of bitter
substances
Literature
MEBAK Brautechnische Analysenmethoden
4th Edition 2002, Volume II, pp 114ff
2.1.1 Procedure for measuring bitter units in beer
1. Prepare samples as described in the working procedure.
2. Select STORED PROGRAMS in the “Main Menu”. Select test
number 801.
3. Insert blank value cuvette (see sample preparation) into the cell
compartment. Close the cell compartment. Touch ZERO .
4. Insert the sample cuvette containing the prepared iso-octane
into the cell compartment and close the cell compartment.
Touch
READ . The result is displayed.
Note: Analysis of additional samples: Repeat working procedure from
point 4.
2.1.1.1 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).