Analysis of the most common mistakes made in the use of gas detectors
When we need to detect the gas concentration in the air, we should use a gas detector. Since the gas detector will be affected by various factors when used, if you do not pay attention to the use method, it may cause it to malfunction. After the instrument malfunctions, it will cause There is a deviation in the test results, which needs to be noted.
Common causes of gas detector failures
1. If the sensor in the gas detector is damaged, no matter what changes occur in the gas concentration in the air, the displayed data will not change. In order to ensure that the gas detector can operate normally, it needs to be tested regularly and quickly. Failure to do so may cause deviations in the measurement results.
2. Harsh environment and severe vibration may cause damage to the instrument. If the gas concentration in the current application environment exceeds the detectable range of the instrument, the sensor will also be damaged. In addition, the filter membrane and sensor port will also be contaminated by liquid, impurities or dust, causing the measurement accuracy to be seriously affected. At this time, the calibration may fail.
3. The detection environment is harsh, the environmental temperature difference changes greatly, or it needs to be exposed to sea water or hot and humid environment for a long time. These environments have high requirements on the stability of the gas detector. Long-term use in these environments may cause the gas detector to malfunction. General instruments cannot be used in such extreme environments for a long time.
Gas detector maintenance methods
1. When using the instrument, you need to check the gas flow rate passing through the instrument. Generally, the gas flow rate is 30/h. If the flow rate is too large or too small, it will have a greater impact on the measurement results.
2. The filter paper needs to be replaced in time after the instrument has been used for a period of time: the air pump should be stopped and the filter tank should be drained.
3. It is necessary to check whether there is air leakage in the gas system of the instrument, whether the diaphragm of the sob pump is damaged, whether the sealing ring of the sampling probe is broken, whether the four-way valve, condenser steam and other components are damaged, etc.
4. Clean the sampling probe and clear the sampling hole pipeline.
5. Check whether the operating status of the condenser is normal. Generally, its temperature needs to be adjusted within the range of 3 degrees Celsius.
6. Check whether the measuring instrument components are dirty and need to be cleaned in time.
