Infrared sulfur analyzer failure analysis 1, the failure of the phenomenon of repeatability or accuracy is not good, the cause of the failure 2.1 weighing inaccurate or wrong operation.

2.2 Insufficient constant temperature of the instrument.

2.3 The infrared tank output voltage is not stable. Voltage fluctuations greater than 15mv.

2.4 The system leaks.

2.5 Insufficient oxygen pressure.

2.6 Oxygen pressure, flow instability 2.7 exhaust flow instability.

3. Remedy 3.1 Weigh the balance at least 1 h after preheating and operate as specified.

3.2 The test was started after the constant temperature was over 1h.

3.3 Check whether the light source voltage (6.0V) is stable; whether the cutting motor works properly; whether the temperature of the constant temperature room is constant; whether the infrared pool is polluted or not.

3.4 Check airtightness to ensure no air leakage.

3.5 Adjust pressure or change air supply.

3.6 Replace Pressure Gauge or Oxygen Bottle 3.7 Make sure the system is airtight. If the flow controller is a problem, it is repaired or replaced by a professional. If it is a problem with a vacuum pump, it is recommended to replace it with a "Chengdu Qihai" product. If the airflow is blocked, loosen the ventilation path or replace the filter.

3.8 timely replacement.

3.9 Recalibrate.

Routine Maintenance of Infrared Sulfur Detector 1. Replace the filter every six months to one year, or replace the filter when the accumulated dust has caused the airflow to be blocked (eg, the flow of exhaust gas is significantly reduced).

2. Remove the accumulated dust and remove the left glass tube. Insert the special tube brush into the ventilation hole of the upper large joint and remove the accumulated dust in the pipeline. Every half month.

3. Check the gas tightness of the gas line once a month or after replacing the gas circuit components.

a) Check the full gas path: ie "Injection port (internal and external combustion tube) → Left desiccant tube → Right desiccant tube → Miniature vacuum pump → Filter → Vent gas flow meter → Flow controller → Flow meter."

Remove the platform, sliding door, upper panel, and place an oxygen purge tube (oxygen gun) outward to open the miniature vacuum pump. Cover the inlet with a white soft rubber plate and press firmly. If the float of the suction flow meter sinks to the bottom, it means that the entire gas line does not leak. During the test, the hand holds two desiccant tubes (the same below) so as not to allow the glass tube to move up due to negative pressure.

If the float does not sink, or sinks to the end, there is a leak in the system. Then find the leak point by section. If the pump is an ordinary electromagnetic pump, it is suspected of leaking gas. If the miniature vacuum pump of “Chengdu Qihai” has a very low probability of failure.

b) Check the part after the “left desiccant tube” small joint, namely “left desiccant tube subhead → right desiccant tube → vacuum pump → filter → flow controller → pumping flowmeter →”:

Remove the left glass tube, place one end of the spare silicone tube over the small connector, and use your fingers to block the other end of the silicone tube and turn on the vacuum pump. If the floater's float does not sink or sink to the end, it means that there is a leak in this part. Then use a similar method and then sub-section inspection (such as removing the right glass tube, check the right after the section of the right desiccant tube section, etc.) until find the leak point.

If the float sinks quickly to the bottom, it means that the leak is before the small section of the left desiccant pipe and it is restored to its original state and then proceed to the next step.

c) Check whether the right desiccant tube and the size of the joint are sealed, whether the inner and outer combustion tube joints are sealed, whether the combustion tube outlet fitting is tightened, or whether the inner and outer combustion tubes are broken. Take measures to check for leaks and troubleshoot.