1、 Equipment installation and precautions 1.1 Installation position selection • The detection probe should be installed at a distance of ≥ 3 times the pipe diameter from the elbow of the pipeline, and the length of the straight pipe section should meet the last 5D (according to Article 5.2 of GB/T 17061-1997). Avoid installing in locations where dust accumulation is likely to occur, such as directly below the outlet of the cyclone separator. For example, in a case of a feed mill, data fluctuations of ± 20% were caused by improper installation (Source: Industrial Safety and Environmental Protection, Issue 3, 2025). Explosion proof equipment must comply with Ex db IIC T6 Gb certification requirements to ensure safe operation in flammable and explosive environments (in accordance with ATEX 2014/34/EU directive). 1.2 Detailed explanation of installation steps • Confirm the working parameters such as pipeline material, diameter, temperature, and pressure. For high-temperature environments (>60 ℃), a cooling plan needs to be planned in advance. Strictly follow the equipment manual for drilling, fixing, and sealing to prevent dust leakage; For example, Yao'an YR-F200 requires the use of a dedicated sealing ring (source: Yao'an Electronic Technical Manual). When connecting power and signal lines, ensure compliance with the 4-20mA standard to avoid signal interference (GAAN Technology GM700 Installation Guide).

1.3 Key points for post installation inspection: Check the firmness of equipment fixation to prevent vibration loosening, especially in high velocity pipelines. Verify the sealing performance and use soapy water to test the interface for no bubble leakage. Power on test signal transmission stability to ensure real-time data upload to the monitoring platform. 2、 Daily usage operation process 2.1 Power on preheating and initialization • Preheat for 15 minutes after power on, and enter monitoring mode after temperature and humidity compensation is completed (GAAN GM700 operating specifications). Check that the screen parameters display normally and there are no alarm codes. Confirm the network connection status to ensure data synchronization to the cloud system. 2.2 Parameter Setting and Calibration • Set alarm thresholds based on operating conditions, referring to the differences in mainstream equipment parameters in the table below: 2.3 Normal Monitoring Operation • Real time monitoring of concentration trends, and immediately verify any abnormal fluctuations. Record and archive data daily to provide a basis for fault analysis. In case of abnormalities, stop the machine according to the contingency plan and record the handling process for future reference. 3、 Common troubleshooting methods 3.1 Handling of false alarms/omissions • Prioritize checking the installation location to avoid interference from bends or accumulation areas (such as an explosion accident in a chemical plant caused by incorrect location). Verify the environmental temperature and humidity. High temperature and humidity can easily cause zero drift, and compensation function needs to be enabled. Compare historical data to determine if there is a deviation in parameter settings. 3.2 Data Exception Analysis • When the reading is low, clean the sensor probe (such as in a power plant where dust adhesion causes dust removal failure). If E03 code appears, it indicates a sensor fault. Check if the wiring meets the 4-20mA standard (Yaorui YR-F20 meter). Use a portable laser calibrator (accuracy 0.001mg/m ³) for on-site comparison and verification (according to JJF 1363-2012). 3.3 Interpretation of Equipment Fault Codes • Establish a fault code manual and familiarize yourself with the definitions of various brands (such as GAAN GM700 E01 for power failure). Record each troubleshooting plan and accumulate operational experience. Contact the manufacturer promptly for complex issues and avoid disassembling on your own. 4、 Safety regulations and maintenance recommendations 4.1 Daily maintenance • Clean the probe weekly under normal working conditions, and conduct daily inspections in environments with dust concentration>50mg/m ³ (according to GB 15577-2018). Install a cooling jacket under high temperature conditions and control the sensor temperature between -40~80 ℃ (Shandong Yao'an Technology). Check the wiring connections monthly to prevent aging and breakage. 4.2 Regular Testing and Calibration • Verify every six months according to GB/T 17061-1997, using standard dust particle testing. Smart devices utilize cloud based systems to automatically analyze trends and reduce manual inspection costs by 30% (2025 China Intelligent Manufacturing Report). Complete record of verification results and create maintenance files. 4.3 Safety operation precautions: Operators must undergo professional training and hold certificates before taking up their posts. Strictly comply with GB 15577-2018 explosion-proof regulations and regularly practice emergency plans. Pay attention to the new regulations of GB/T 17061-2024 (implemented in 2026) and upgrade IoT functional devices in advance to meet the requirements of Announcement No. 7 of 2025.