Combustible gas detection alarm (hereinafter referred to as the instrument) by the detector alarm probe and Yi Yang (host) structure, widely used in the presence of flammable gas oil, gas, chemical and other industries to detect leaks of its dangerous place to ensure that personal and property safety. However, disaster prevention as an important device in our daily management did not get enough attention, improper management, management is not in place when there occurred a phenomenon. Therefore, I regard the situation to talk about their views and opinions, for our discussion.

    1. Select Instrument

    Explosion instrument category, class, groups must meet the requirements class level, groups of explosive gas mixtures site may not be used in explosion-proof mark over the allowed environment, otherwise the explosion would not achieve the role. Instrument Selection manufacturers should consider regular, advanced technology products, sensitive and reliable, meet the appropriate environmental requirements.

    2. Installation location

    Yang Yi density level of the instrument mounting position as the gas to be measured should be, less than the density of air in the measured gas, the detection probe should be installed on top of the leak position about 1m; air density is greater than the measured gas, which detector probe should be installed below the leak of about 0.5m above the ground position and the position; density similar to the measured gas and air, the detector probe should be as close to the leak. Install outdoor probe mounting height should also be selected based on the measured density of the gas, with particular attention the fact that the detector probe should be installed downwind side of the prevailing wind direction. Detector probe must be installed after the installation breathable waterproof cover, so as not to damage the probe into the rain. Breathable waterproof cover should be cleaned regularly to ensure that the measured gas normally enters the detector probe.

    3. Installation Environment

    For the installation of the detector probe in the open air, temperature and humidity factors must be considered to ensure compliance with environmental temperature and humidity instrument use. Places to install the instrument should take into account the impact of halogen compounds of elements of the instrument will keep the detector sensitivity is reduced, shortening the life of the instrument but also a serious loss of detection.

    4. Installs

    For the possible presence of flammable gas leaks large and medium-sized establishments, according to the relevant provisions of each distance (10 ~ 20) m should set a detection point. For relatively small enclosed space (such as pumping stations, storage bottle chamber) should also be set up to detect the point. When the complexity of the scene environment gas species, the number of the detector, the model should be relatively increased. If the detector does not meet the site environment, will not be able to detect the concentration of the ambient gas is also likely to cause a detector malfunction and damage.

    5. Periodic inspection

    For self-test function of the instrument, once a week should move "self-test button" to check whether the alarm system indicating normal; conduct a visual inspection week, check the connection parts, moving parts, display and control knobs, check the fault light Check-proof seals and fasteners, check the probe clogging, check the contents of water and so on. For direct use of lighter gas and Yi Yang detector probe to touch the instrument to test the reliability of behavior, I believe that defect, so easily lead to gas detector probe damage, or failure to reduce the sensitivity of the detector.

    6. Periodic calibration

    Calibration equipment to be used by the metrology department certified standard gas to match the measured gas. Pass into the instrument display zero gas concentration of 0% LEL, and then pass into the different concentrations of standard gas, upon showing the value of stable, adjust the instrument to the standard indication. Other indicators should be consistent with the relevant national metrological verification of requirements. Calibration cycle is generally not more than one year. It should also be noted that in the calibration process when disassembled For debugging, must be worn if there is flammable gas, as well as to guide the use of explosion-proof walkie-talkie debugging portable instrument detects the surrounding environment.