First, the nitrogen generator, the nitrogen inlet valve and the sampling valve are closed, and the power switch is turned off. Wait for the system and complete rescue tube end (system oxygen depletion concentration, pay attention to fire safety, indoor air circulation and clear). Adjust oxygen analyzer sampling and pressure regulating valve is 1, adjust the sampling flowmeter, can increase the volume of the sample volume is not too much attention. Nitrogen purity test.
Second, when more than 0.7 MPa compressed air supply pressure, open the nitrogen inlet valve, and then adjust the safety valve will be reduced to 0.4 --0.5 MPa, while observing the tank and the pressure of the pneumatic valve is working properly.
Three, then turn on the nitrogen PLC control cabinet main power switch. The pressure changes of the two adsorption towers were observed to determine whether the two adsorption towers could switch normally. The pressure of the regenerator is zero, even if the two towers should be close to half of the original pressure column operating pressure.
Four, open the oxygen analyzer power switch, and adjust the appropriate number of sample processes, oxygen content. According to the purity of the nitrogen required for the purity of the valve, automatic switching into the purity of nitrogen storage tanks, nitrogen storage tank nitrogen is usually about 0.6 - 0.8 MPa pressure.
Five, for each system and part of the system, when the nitrogen adsorption tank pressure reaches 0.6 MPa, nitrogen system is observed to work properly.
Six, slowly open the exhaust valve to close the inlet valve to adjust the flow rate to the rated 1/2 (hospital central oxygen supply system). Adjust nitrogen inlet valve opening to adjust nitrogen purity and flow.
Seven, oxygen content analyzer oxygen analyzer. When the nitrogen purity requirements, and then slowly open the pure gas valve, will flow to the required flow, close the ventilation intake valve, when the normal operation of the device can be used.
