ECG machine through the human body of the heart of the wave group of morphological and rhythm analysis, for clinical diagnosis and research use, is an important device for diagnosis of heart disease. The main types of ECG are single channel and multichannel ECG machine, exercise electrocardiogram, dynamic electrocardiogram, ECG, ECG, and so on. ECG machine belongs to the measurement apparatus of compulsory verification. JJG543-96 the EEG machine "metrological verification regulations, ECG machine the main test items have: appearance and its normal work inspection, voltage measurement, sensitivity, time interval, go paper speed, hysteresis, the default standard voltage, time scale, impulse, time constant, amplitude frequency characteristic, filter, high polarization voltage, common mode rejection ratio, the width of the baseline, baseline drift, noise, inter electrode resistance measurement and input impedance of 19. One of the failed, the electrocardiogram machine that was sentenced to failure. Although there is a good quality of domestic ECG machine, but still has a large gap with foreign brands. First of all, the function is still slightly less than the foreign brands in the remote monitoring and other aspects of the domestic ECG machine can not match the advantages; second, the degree of intelligence is still a little short, large workstation software and stand-alone analysis functions are not as good as foreign brands. Buy ECG machine note: first, the purchase of 1 selected well-known enterprises to produce brand-name products, the products of these enterprises in line with national technical requirements, product quality is more reliable. 2 before purchase to see the product quality. New products should meet: the appearance of the shell should be neat and beautiful, clean, color uniform, no scars, cracks and other defects; the panel should be no coating off, corrosion, and signs on the panels are clearly visible; plastic parts should be no bubble, cracking, deformation and overflow phenomenon. Control and adjustment mechanism should be flexible and reliable, the fastening parts should be no loose. After the function keys are operated, the function keys are converted to each function, and the function of the product is normal. According to the "measurement Law" provides that the ECG machine belongs to mandatory testing of measuring instruments, consumers in the use of local quality and technical supervision departments should be sent to the test, the use of qualified. The use of the reference before the use of the technical manual, familiar with the operation of key and the arrangement and function of the key, the right place the instrument, the installation of the paper, the power cord and the ground wire; the right to put the battery, to understand the battery charging method. Using the method of operation in accordance with the instructions of the instrument. In short, the domestic well-known state-owned enterprises and joint ventures in the production of the ECG machine products quality is good, consumers can rest assured that use.