C. Safety Protection Hardware interlock protection unit of this analyzer provides a serious of protective measures, it can detect working state of a data acquisition card, detect the pressure state of reaction gas and protective gas, detect the state of manual emergency switch and has hydrogen leak detection. The test analyzer that is running or in the running process, when the abnormal situation appears(such as abnormal battery voltage, battery temperature is abnormal, overload load device, the abnormal water level of the diffuser, abnormal system overheating, loss of gas supply pressure or excess pressure, leak hydrogen etc.), hardware protection chain reaction can be immediately cut off the supply routes, implement emergency protection by loading nitrogen to make reaction immediately stop and open the alarm system to alert engineers to manually stop the fuel cell working.