All the measurement and analysis of Type DG5031 enzyme immunoassay apparatus are controlled by the computer system within the instrument.Adopting Dot-Matrix LCD,membrance keyboard,it looks very novel and beautiful in the design.The entire operate course is shown in Chinese character menu by different levels according to the operating sequence which is both simple and clear to read.It can memorize the parameters set by the users and print the measuring result automatically.This instrument has the test items such as Hepatitis B,Hepatitis C,and Hepatiits E,HIV/AIDS,etc.and the measurement of two and a half pairs in hepatitis B has integrated into one independent function.The users can test the five indexes at one time,which greatly simplified the measuring operations,Besides using the P/N method to measure the two and a half pairs in hepatitis B,his apparatus also introduces another two methods calledS/CO（cut off）。

In the measuring process,zero-adjustment and monitoring of absorpting value can be done at anytime without interrupting the progressing of the measuring process.