Fixed gas detectors are precision instruments for detecting gas leakage concentrations, which can detect the leakage concentrations of combustible gases or toxic and harmful gases in industrial and commercial places in real time. When the gas leakage concentration in the environment reaches or exceeds the preset value of the instrument, the alarm will send out an audible and visual alarm signal, and can start external equipment such as solenoid valves and exhaust fans to automatically eliminate hidden dangers, protect factory safety production, and ensure the safety of employees. Therefore, the correct installation and maintenance of fixed gas detectors are crucial.
Installation of fixed gas detectors
1 Prepare tools and materials: According to installation needs, prepare corresponding tools and materials in advance, such as screwdrivers, hammers, wire strippers, electric drills, expansion screws, etc.
2 Select the installation location: The gas detector should be installed in an area where gas leakage may occur, and the installation location must be firm. According to the specific gravity of the gas to be measured relative to air, select a suitable installation height.
☆ When the measured gas has a specific gravity less than that of air, the gas will escape upward after leakage, so the detector should be installed 30 to 60 cm from the ceiling;
☆ When the measured gas has a specific gravity greater than that of air, the gas will escape downward after leakage, so the detector should be installed 30 to 60 cm from the floor.
At the same time, factors such as airflow direction, personnel flow, height and angle, distance and density should be considered during installation to ensure that the detector can capture the target gas.
3 Check the installation environment: In order to use the detector correctly and prevent its failure, please do not install it in the following locations: places directly affected by steam and oil smoke; places with large air flow such as air inlets, ventilation fans, and doors; places with a lot of water vapor and water droplets (relative humidity: greater than 90%); places with temperatures below -40°C or above 70°C.
4 Drilling and fixing: Use an electric drill to drill holes in the wall, and then fix the detector to the wall with expansion screws. Make sure it is firmly fixed to prevent the detector from loosening or falling during use.
5 Wiring: Use highly shielded wires to prevent electrical signals from being interfered with, and connect the power cord and signal cord to the appropriate power and signal interfaces respectively. Ensure that the connection is firm and reliable to avoid short circuits or open circuits. After the wiring is completed, open the top cover and lay out the wires.
6 Set parameters: Set the corresponding parameters of the device according to the operating manual of the gas detector. Including alarm setting value, response time, detection range, etc.
7 Power-on check: After installation, power on the gas detector to test it to ensure that the device can work properly. Check whether the alarm system can accurately send out sound and light alarm signals.
8 Debugging and calibration: After installation, debug and calibrate the gas detector to ensure that it can accurately detect the target gas.
Selection of installation location for fixed gas detectors
01 Select according to gas type: For detecting gases with a specific gravity less than air such as natural gas, the gas detector should be installed near the ceiling; for detecting combustible gases or toxic gases heavier than air, the detector should be installed near the ground.
02 Consider the direction of airflow: Choose a location that is conducive to gas circulation, which helps the gas detector better capture the target gas. Avoid installing the detector in areas where airflow is blocked or dead corners.
03 Avoid interference from personnel: Avoid installing gas detectors in areas where people frequently move or stay, so as not to interfere with the detection results. At the same time, ensure that the installation location of the detector is convenient for personnel to observe and operate.
04 Easy to maintain and overhaul: The installation location of the detector should take into account the maintenance and overhaul needs of the equipment. Ensure that sensors and other components are easy to disassemble and replace to facilitate future maintenance and overhaul work.
