Explosion proof gas analyzers are key equipment for ensuring safety in flammable and explosive environments such as petrochemicals, natural gas, and pharmaceuticals. It can monitor the concentration of flammable and toxic gases in the environment in real time, issue alarms in a timely manner, and prevent accidents from occurring. This article will provide a detailed introduction to its on-site calibration, data reading, and emergency response techniques to help operators better use and maintain this important equipment.
1、 On site calibration: ensuring the accuracy of measurements
（1） Preparation before calibration
Check equipment status: Before calibration, it is necessary to inspect the appearance and internal components of the explosion-proof gas analyzer to ensure that the equipment is in good condition. Check if the sensor is clean, if the air circuit connection is secure, and if the power supply is stable.
Prepare calibration gas: The calibration gas should be a standard gas with a composition similar to the actual monitored gas to ensure the accuracy of calibration. The calibration gas should have a known concentration and be within its validity period.
Preheating equipment: Turn on the explosion-proof gas analyzer and preheat the equipment for at least 30 minutes to ensure that all components of the equipment reach a stable state.
（2） Calibration steps
Zero point calibration: Introduce zero point calibration gas (usually high-purity nitrogen) into the instrument, adjust the instrument's zero point, and display the reading as zero. Zero point calibration is the fundamental step in ensuring measurement accuracy.
Range calibration: Introduce the range calibration gas (a standard gas of known concentration) into the instrument, adjust the range of the instrument, and make the reading consistent with the concentration of the standard gas. Range calibration ensures that the instrument has accurate linear response within the measurement range.
Multi point calibration: To further improve the accuracy of calibration, multiple known concentrations of standard gases can be used for multi-point calibration. Through multi-point calibration, a calibration curve can be drawn to ensure the accuracy of the instrument throughout the entire measurement range.
Calibration verification: After completing the calibration, use a standard gas of known concentration for verification to ensure the accuracy of the calibration results. If the verification result deviates significantly from the concentration of the standard gas, recalibration is required.
2、 Data Reading: Ensuring the Accuracy and Reliability of Data
（1） Preparation before data reading
Check equipment connection: Ensure that the explosion-proof gas analyzer is properly connected to the data acquisition device (such as a computer or mobile device). Check if the communication cable is loose and if the communication port is damaged.
Set collection parameters: Based on monitoring requirements, set data collection parameters such as sampling frequency, sampling time, etc. Ensure that the collected parameters meet the monitoring requirements.
Check environmental conditions: Before reading data, record basic information about the monitored environment, such as temperature, humidity, pressure, etc. These information will be stored together with monitoring data for subsequent analysis.
（2） Data reading steps
Start data collection: Turn on the explosion-proof gas meter and data collection equipment, and start the data collection program. Ensure that data collection devices can receive and record monitoring data in real-time.
Real time monitoring: During the monitoring process, the explosion-proof gas meter will collect real-time concentration data of gases in the environment, and display and record it through data acquisition equipment. Operators should pay real-time attention to data changes and promptly detect abnormal situations.
Data storage and backup: The collected data should be stored in real-time in the data collection device and backed up regularly. Ensure the security and integrity of data for subsequent analysis and processing.
（3） Data Processing and Analysis
Preliminary data analysis: The collected data needs to undergo preliminary analysis to check its completeness and accuracy. By analyzing the data, it is possible to preliminarily determine whether the gas concentration in the environment exceeds the standard.
Detailed data analysis: For excessive or abnormal data, conduct detailed data analysis to determine the type and concentration of excessive gases. The analysis results can provide scientific basis for the formulation of safety measures.
Data report generation: Based on the analysis results, generate detailed monitoring reports. The report should include monitoring environmental information, monitoring data, analysis results, and other content for easy archiving and reference.
3、 Emergency handling of faults: quickly locate and solve problems
（1） Abnormal measurement data
Sensor contamination: If there are abnormal fluctuations or deviations in the measured data, it may be due to contamination of the sensor surface. Check if the sensor is covered with dust, oil, or other impurities, and clean it if necessary.
Air leakage: Check if the air connection is secure and if there is any leakage. Leakage in the gas path may cause changes in the concentration of the measured gas, affecting the accuracy of the measurement results.
Calibration issue: If the measured data does not match the actual situation, it may be a calibration issue. Re calibrate to ensure accurate concentration of calibration gas and correct calibration steps.
（2） The device cannot start
Power issue: Check if the power connection of the device is normal and if the power switch is turned on. If the power indicator light is not on, it may be due to a loose power cord or a faulty power adapter.
Fuse blown: Check if the fuse of the equipment is blown. If the fuse is blown, it is necessary to replace it with a fuse of the same specification.
（3） Data transmission issues
Communication connection: If the device is unable to transmit data to the data collection device, check if the communication connection is working properly. Check if the communication cable is loose and if the communication port is damaged.
Software issue: Check if the data collection software is running properly and if there are any software conflicts or version incompatibility issues. If necessary, reinstall or update the data collection software.
（4） Equipment alarm
Check alarm information: When the device alarms, specific alarm information will be displayed. Check the corresponding components or parameters based on the alarm information.
Check the air circuit pressure: If the alarm message indicates abnormal air circuit pressure, check whether the air circuit pressure is normal and whether there is any leakage.
Check temperature: If the alarm message indicates abnormal temperature, check whether the heating components of the equipment are working properly and whether the cooling system is unobstructed.
（5） Emergency situation handling
Immediate evacuation: If the gas concentration in the environment exceeds the standard, evacuate the dangerous area immediately to ensure the safety of personnel.
Notify relevant personnel: promptly notify security management personnel or emergency response teams to take corresponding security measures.
Equipment inspection: Inspect the equipment in a safe area to determine if it is working properly. If the equipment is damaged, repair or replace it promptly.
4、 Summary
The correct use and maintenance of explosion-proof gas analyzers are crucial for ensuring the safety of flammable and explosive environments. By mastering on-site calibration, data reading, and emergency response skills, operators can effectively improve the measurement accuracy and reliability of equipment. Regular equipment maintenance and calibration, timely handling of malfunctions, can ensure that explosion-proof gas meters are always in good working condition, providing strong guarantees for safety production.