It is necessary whether the gas detector needs to be tested regularly. The state stipulates that the gas detector needs to be tested once a year. From the date of delivery, the gas detector needs to be tested once a year, and it needs to go to the legal metrology department or the statutory authorized unit. Go check. Gas detectors are mostly equipment used to detect changes in gas leakage concentrations, which require high precision and accuracy. Regular testing can ensure the accuracy and safety of the instrument and avoid dangerous accidents caused by instrument failure.
The items that need to be tested by the gas detector include the measurement performance of the instrument, including the indication error, repeatability, response time, drift degree, and the general technical requirements of the instrument, including appearance structure, logo, power-on inspection, alarm function inspection and insulation resistance. etc.
When inspecting the appearance and structure of the instrument, it is required that the work damage of the instrument cannot affect its normal operation. The surface of the newly manufactured instrument should be smooth and smooth, with uniform paint coating, and no peeling and corrosion. The connection of the instrument is reliable, and the knobs and buttons can be operated and controlled normally. The name, model, date of manufacture, factory manufacturer, instrument number, explosion-proof certification and other marks of the instrument should be complete, complete and clear. After the instrument is powered on, it should be able to work normally, and the display screen can display various data clearly and completely. The sound and light alarm function of the instrument should be able to send out an alarm signal normally. When testing, it is necessary to repeat the measurement three times, and take the arithmetic mean value of the three measurements as its alarm action value. For some instruments using AC power supply, the insulation resistance should not be less than 20MΩ.
When testing, it is necessary to ensure that the ambient temperature is within the range of 0-40°C, the relative humidity is lower than 85%, and it is in a well-ventilated place without interfering with the measured gas. The gas standard substance of the same type as the gas measured by the instrument should be used for inspection, and isobutane or propane gas standard substance can also be used for detection.
Xi'an Huafan Technology Co., Ltd. has developed and produced a variety of gas detectors. Here we recommend a Handheld Multi gas detector and alarm. This instrument can detect 1-4 kinds of gases at the same time, and the number of detected gases can reach more than 500 kinds. Optional, built-in filter, can be used in high humidity, high dust environment; large data storage capacity.