How to Use This Manual Describes the organization and use of the Service Manual. General Information Describes the Data Logger and its available Accessories and options. Required test equipment, shipping, and factory service information are included here. Theory of Operation Covers the theory of operation for the Data Logger mainframe. Option assembly theory is contained in the individual option subsections of Sections 8, 9, and 10. Maintenance Describes maintenance of the instrument. Cleaning instructions and internal access procedures are included here. Troubleshooting Consists of diagnostic self-tests and performance tests designed to isolate a malfunction to the circuit board level. Component level troubleshooting may be performed using the Theory of Operation (Section 3) and Schematic Diagrams (Section 7). List of Replaceable Parts Contains parts lists for the Data Logger mainframe and gives parts ordering information. Option assembly parts lists are in the individual subsections of Sections 8, 9, and 10. Schematic Diagrams Presents Data Logger mainframe schematics on foldout pages. Schematics for option assemblies are located in the individual option subsections. Options -160 Through -169 Covers Options -160 through -169 in subsections ordered numerically by option number. Includes theory of operation, maintenance procedures, performance validation procedures, calibration instructions, schematics, and a replacement parts list. Covers Options -170 through -179 in subsections ordered numerically by option number. Includes theory of operation, maintenance procedures, performance validation procedures, calibration instructions, schematics, and a replacement parts list. Options -200 and Above Covers Options -200 and above in subsections ordered numerically by option number. Includes theory of operation, maintenance procedures, performance validation procedures, calibration instructions, schematics, and a replacement parts list. Appendices A Specifications B Fluke Service Centers C Manual Change Information D Differences Between 2280A 2280B 2285B and 2286A