This manual covers all the instructions related to the operation and general maintenance of the BC-2800 Auto Hematology Analyzer. To ensure this analyzer performs in the best way, please carefully read and comprehend the contents of this manual and operate/maintain this analyzer exactly as instructed. This manual includes a detailed description of this analyzer, the specifications given by the manufacturer, methods to install, calibrate and maintain this analyzer, and measures to be taken when errors occur. It also presents the working principle of this analyzer and the recommended reagents. Operation notes, limits and potential hazards are stressed where appropriate. This chapter mainly deals with the following contents: