Combustible Gas Detector Troubleshooting
A combustible gas detector responds to the concentration of single or multiple combustible gases. Combustible gas detectors fall into two categories: catalytic type and infrared optical type. Users may encounter faults during operation, so it is necessary to master relevant troubleshooting measures. What are the specific troubleshooting methods for combustible gas detectors?
① If air conditioners or heating equipment are installed close to the combustible gas detector, direct cold or hot airflow blowing onto the detector may change the resistivity of its platinum wire and lead to measurement errors. Therefore, the combustible gas detector shall be kept away from air conditioners and heating equipment to prevent faults caused by improper installation locations.
② Electromagnetic interference shall be prevented during operation. Anti-interference measures shall be considered for the installation position, mounting angle, protection scheme and system wiring of the combustible gas detector. Electromagnetic interference affects the detector mainly through three pathways: airborne electromagnetic waves, narrow pulse clusters on power cables and other input/output lines, and human static electricity.
③ Attention shall be paid to fault-inducing factors such as dust, high temperature, humidity and rain exposure. If an exhaust fan is installed
adjacent to the detector at the monitoring site, leaked combustible gas may fail to diffuse sufficiently to the detector, resulting in delayed detection.
④ For combustible gas detectors installed in explosion-hazardous areas, explosion-proof models shall be adopted. For Class A workshops where combustible gas is released, the explosion-proof grade of the selected detector shall not be lower than the requirement specified in current standards.
⑤ Avoid installing the detector in areas exposed to high temperature, high humidity, steam or oil fume. Do not place or hang objects on the detector. The installed combustible gas detector shall not be relocated arbitrarily.
⑥ Whenever possible, select combustible gas detectors with replaceable sensor probes for convenient maintenance and operation.
