Hach-Lange BODTRAK II: Respirometric Biochemical Oxygen Demand (BOD) - Manual (Page 3)

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Table of contents
Section 1 Specifications .................................................................................. 5
Section 2 General information ....................................................................... 7
2.1 Safety information ....................................................................................... 7
2.1.1 Use of hazard information ................................................................ 7
2.1.2 Precautionary labels ......................................................................... 7
2.2 Theory of operation ..................................................................................... 8
2.2.1 Oxygen transfer to sample ............................................................... 8
2.2.2 Pressure sensor function .................................................................. 9
2.2.3 Removing carbon dioxide ................................................................. 9
Section 3 Installation ...................................................................................... 11
3.1 Component list .......................................................................................... 11
3.2 Electrical installation ................................................................................. 12
Section 4 Operation ........................................................................................ 13
4.1 Operational controls .................................................................................. 13
4.1.1 Channel selection keys ................................................................... 14
4.1.2 The arrow keys ............................................................................... 14
4.1.3 The ON key .................................................................................... 14
4.1.4 The OFF key ................................................................................... 14
4.2 Bottle connections .................................................................................... 14
4.3 Setting the clock ....................................................................................... 15
4.4 RS232 Interface ........................................................................................ 15
4.5 Downloading test results ........................................................................... 16
4.5.1 Import data ..................................................................................... 16
4.5.2 Data format ..................................................................................... 17
4.5.3 Printing test results ......................................................................... 18
Section 5 BODTrak™ II procedures .......................................................... 19
5.1 General Information .................................................................................. 19
5.2 Simplified procedure ................................................................................. 20
5.3 Hach GGA (glucose/glutamic acid) procedure .......................................... 22
5.4 Hach Standard Method procedure ............................................................ 24
5.5 Completion steps for all procedures ......................................................... 27
5.5.1 Determination of results .................................................................. 30
5.6 Typical curves ........................................................................................... 32
5.7 Special considerations .............................................................................. 33
5.7.1 Sample dilution ............................................................................... 33
5.7.2 Sample seeding .............................................................................. 33
5.7.3 Sample temperature ....................................................................... 33
5.7.4 Toxic materials ............................................................................... 33
5.7.5 Chlorine .......................................................................................... 34
5.7.6 pH effect ......................................................................................... 34
5.7.7 Supersaturation .............................................................................. 34
Section 6 Maintenance .................................................................................. 35
6.1 Cleaning the instrument ............................................................................ 35
6.1.1 Sample bottles ................................................................................ 35