Precautions for on-site maintenance of combustible gas alarms
When flammable gas leaks in industrial environments or daily life environments (such as kitchens using natural gas), and the flammable gas alarm detects that the concentration of the flammable gas reaches the alarm value set by the alarm, it will send out a sound and light alarm signal to It is an indispensable instrument in industrial production and daily life to remind people to take safety measures such as evacuation, forced ventilation, and shutdown of equipment. So what are the precautions for on-site maintenance of combustible gas alarms?
1. The power must be cut off for testing
The first choice for repairing instruments and meters must be a certain degree of circuit foundation and theoretical knowledge of electronic circuits. You must understand the use and operation of multimeters, and know how to check the causes of instrument failures. While performing power-off inspections, you must not only do a good job The most important thing about the cleaning work inside the instrument is that it can find various obvious fault parts so that faults can be judged and eliminated faster. For example: when the electronic tube is out of gas, there is milky white substance inside the tube. When the electrolytic capacitor breaks down and deteriorates, most of the electrolyte will flow out or the shell will crack. When the electrode is damaged, it will turn black or burnt. Diode symbol, when the diode voltage stabilizing zinc breaks down, the shell will also turn black, burnt, and burst. There is a burning smell and traces when the transformer burns out. Therefore, power outage inspection is an important step in instrument maintenance. During the maintenance process, some found that components in the circuit were desoldered and had poor contact, which would affect the normal operation of the circuit. Therefore, the power outage detection method is relatively intuitive.
2. Pay attention to linkage equipment
In order to ensure the safety of production, many companies often install chain functions. Therefore, at least two alarm devices are required for the chain loading capacity. In addition, they also need to install drive exhaust devices, sprinkler devices, etc. etc. In addition, during the detection process, it is best for the company to immediately cancel the alarm after an alarm is set off, so that the chain alarm can be stopped immediately.
3. The installation location cannot be changed at will.
In the process of on-site inspection, the inspection generally requires the cooperation of more than one person. The inspection personnel cannot move the explosion-proof equipment at will. When using the intercom, an explosion-proof intercom must be used. In addition, during the inspection process, different factories are in different places. environment, so the environment needs to be treated flexibly. During the inspection process, staff also need to consider grounding issues, which can effectively prevent safety issues such as electric shock.
