What should I do if the flammable gas alarm fails?

The combustible gas alarm is a gas leak detection alarm instrument. When the flammable or toxic gas leaks in the industrial environment, when the gas alarm detects that the gas concentration reaches the critical point set by the explosion or poisoning alarm, the flammable gas alarm will send an alarm signal to remind the work to take safety measures, gas alarm The device is equivalent to an automatic fire extinguisher, which can drive exhaust, cut off, and spray systems to prevent explosions, fires, and poisoning accidents, thus ensuring safe production. The combustible gas alarm can measure various gas concentrations. It is often used in chemical plants, oil, gas stations, steel plants and other places where there is gas leakage. The reason for the failure of using the flammable gas alarm is very complicated. In general, the user mainly does not understand the performance of the detector, improper selection of the equipment, improper use of the user, failure to comply with the specifications, and insufficient maintenance. The following mainly analyzes the cause of the user's failure to use the flammable gas alarm, and proposes the correct use of the flammable gas alarm, hoping to help the user minimize the occurrence of the failure.

1. Improper use by the user: During the use of the detector, the air conditioner and the heating device are installed close to the combustible detector. When the air conditioner and the heating device are used, if the cold and warm air flow directly blows through the combustible gas alarm, There may be an error in the change of the resistivity of the flammable gas alarm platinum wire. Therefore, the flammable gas alarm should be kept away from the air conditioner and heating equipment to avoid malfunction caused by improper setting.

Users should also pay attention to anti-electromagnetic interference during the use of flammable gas alarms. The location of the combustible gas alarm, installation angle, protective measures, and system wiring should be protected against electromagnetic interference. There are three main ways for the electromagnetic environment to affect the flammable gas alarm: air electromagnetic interference in the air, narrow pulse groups on the power supply and other input and output lines, and static electricity in the human body. For example, when the flammable gas alarm is installed close to the air conditioner, it will cause deviations in the detection of the system; the distance between the detection line and the power line, the illumination line and other strong electric lines is small, and without the anti-electromagnetic interference measures, the system will also detect the deviation. .

During the process of using the flammable gas alarm, users should pay attention to factors that may cause malfunctions, such as dust, high temperature, humidity, and rain. When the exhaust fan is installed in the field where the flammable gas alarm is installed, the exhaust fan is placed adjacent to the flammable gas alarm, and the leaked flammable gas will not be fully diffused to the vicinity of the flammable gas alarm, resulting in failure to detect in time. Mistaken aircraft.

In addition, the user should also pay attention to the setting of the flammable gas alarm in the explosion-proof place. For example, the Class A plant that emits flammable gas should use the explosion-proof flammable gas alarm, and the explosion-proof level should not be lower than the corresponding explosion-proof level requirement of the current specification. Users should also use flammable gas alarms to avoid places where high temperature, high humidity, steam, and fumes can be avoided. Do not place objects or hang items on the detector. The installed flammable gas alarm cannot move the position of the device arbitrarily. The user uses the combustible gas alarm to select the sensor probe replaceable product for ease of use.

2. The construction process is not standardized: if the construction process is not standardized, the flammable gas alarm will be detected during the use process. If the flammable gas alarm is not located in the vicinity of the flammable gas that is easy to leak, or is installed adjacent to the exhaust fan, the leaking flammable gas cannot be fully diffused to the vicinity of the flammable gas alarm, so that the leakage danger cannot be timely notified by the flammable gas. Detecting. For residential flammable gas alarms should be installed in the kitchen near the gas pipelines, stoves, when the residents use natural gas, the gas detector ceiling is installed within 300mm from the ceiling; when the residents use liquefied petroleum gas, gas detection The device should be installed within 300mm from the ground.

If the flammable gas alarm is not reliably grounded, it cannot eliminate the electromagnetic interference, it will affect the voltage, and the fault of the detection data is inaccurate. Therefore, the flammable gas alarm should be reliably grounded during construction. The flammable gas alarm and the terminal are located in the place where they are vulnerable to collision or easy to enter, causing the electrical circuit to be disconnected or short-circuited. Welding must use non-corrosive flux, otherwise the joint will be corroded or increase the line resistance, affecting normal detection. Do not drop or drop the detector to the ground. After the construction, debugging should be carried out to ensure that the flammable gas alarm is in normal working condition.

3. Maintenance: The flammable gas alarm should detect the flammable gas information, and the detector must communicate with the detection environment. Therefore, various polluting gases and dust in the environment can not be avoided, which is caused by the detector. The damage of working conditions is objective. The working environment of flammable gas alarms is relatively harsh. Many of them are installed outdoors. Poor maintenance will lead to errors or no detection of flammable gas alarms. Therefore, regular cleaning and maintenance of the flammable gas alarm is an important task to prevent malfunction. The grounding should be tested regularly, the grounding can not meet the standard requirements, or it is not grounded at all, and the flammable gas alarm will be susceptible to electromagnetic interference and cause malfunction. Prevent components from aging. From the perspective of reliability, at the same time, it has been proved that the failure of the aging of components due to the aging of components of flammable gas alarms for more than 10 years tends to increase. Therefore, if the service period exceeds the requirements of the regulations, it should be replaced in time.