Common faults and causes of faults in gas detectors
The construction process is not standardized
If the combustible gas detector is not located near the equipment that is prone to leakage, or is installed adjacent to the exhaust fan, the leaked substance cannot fully diffuse to the vicinity of the combustible gas detector, thus preventing the leakage risk from being detected by the combustible gas detector in a timely manner. If the combustible gas detector is not reliably grounded and cannot eliminate electromagnetic interference, it will inevitably affect the voltage and cause inaccurate detection data faults. Therefore, the combustible gas detector should be reliably grounded during the construction process. The combustible gas alarm and wiring terminals are located in areas that are prone to collision or water ingress, causing open or short circuits in electrical circuits. Welding must use non corrosive flux, otherwise the corrosion at the joint will detach or increase the line resistance, affecting normal detection. Do not drop or throw the detector onto the ground. After construction, debugging should be carried out to ensure that the movable alarm is in normal working condition.
Improper use by users
During the use of gas detectors by users, the air conditioning and heating equipment should be installed close to the combustible gas detector. If the cold and warm air flow directly blows through the alarm during the use of the air conditioning and heating equipment, it may cause changes in the electrical resistivity of the alarm platinum wire, resulting in errors. Therefore, the alarm should be kept away from the air conditioning and heating equipment to avoid improper positioning and failure. Users should also pay attention to preventing electromagnetic interference during the use of combustible gas detectors. The installation position, installation angle, protective measures, and system wiring of the movable alarm should be protected against electromagnetic interference. During the use of combustible gas detectors, users should pay attention to factors that can easily cause malfunctions, such as dust, high temperature, humidity, rain, etc.
When an exhaust fan needs to be installed in a location where a combustible gas alarm is installed, if the exhaust fan is installed adjacent to the combustible gas detector, the leaked combustible material will not be able to fully spread to the vicinity of the combustible gas alarm, causing failure to detect in a timely manner and delaying the operation of the aircraft. Users should also pay attention to avoiding areas with high temperature, humidity, steam, and oil fumes when using combustible gas detectors. Do not place or hang items on the detector. The installed combustible gas detector cannot move the device's position arbitrarily. Users should try to choose products with replaceable sensor probes when using alarms for ease of use.
The maintenance and upkeep of the body detection instrument requires the detection of body concentration
The working environment of combustible gas detectors is relatively harsh, and many of them are installed outdoors. Poor maintenance and upkeep can lead to errors or failure to detect the movable alarm. Therefore, regular cleaning and maintenance of combustible gas detectors is an important task to prevent malfunctions.
Grounding should be regularly tested. If the grounding does not meet the standard requirements or is not grounded at all, it can also make the combustible gas detector susceptible to electromagnetic interference and cause malfunctions.
It is recommended to perform a response test on the standard gas used in various instruments before use to ensure that the instruments truly play a protective role. Combustible gas alarms and toxic gas alarms, like other analytical and detection instruments, are measured using a relative comparison method: first, the instrument is calibrated with a zero gas and a standard concentration gas, and the standard curve is stored in the instrument. During the measurement, the instrument compares the electrical signal generated by the gas concentration to the electrical signal of the standard concentration, and calculates the accurate gas concentration value. Therefore, zero calibration of the instrument at any time and frequent calibration of the instrument are all tasks to ensure accurate measurement of the instrument.
