The operation and maintenance procedures for portable infrared gas analyzers mainly include the following key steps and precautions:
Operating Procedures
preparation
Instrument inspection: Before use, check whether the appearance of the instrument is intact, whether all components are complete, and ensure that the instrument power supply is sufficient (if using battery power, check whether the battery level is sufficient).
Environmental inspection: Understand the basic situation of the tested environment, such as the presence of flammable and explosive gases, toxic gases, etc., choose a suitable usage environment, and avoid using in harsh environments such as high temperature, high humidity, and high dust.
Sampling preparation: Prepare the sample collector and pipeline, remove the covers of the sampling inlet and outlet, connect the gas sampling tube to the inlet end, and install a zero gas filter to ensure that the sampling port is in full contact with the gas and away from factors that may affect the detection results, such as open flames, electromagnetic fields, etc.
Power on and calibration
Power on and start: Press the power button to turn on the instrument, wait for the instrument to self check and enter the working state.
Calibration operation: Before use, calibration should be carried out according to the instrument manual, usually including zero calibration and range calibration. A known concentration of standard gas should be used for comparison to ensure the accuracy of the detection results. During the calibration process, blowing requires 5 times the volume of air in the chamber. If the sampling tube is extended, the zero calibration process needs to be repeated to ensure sufficient gas passes through the zero gas filter.
Detection operation
Parameter setting: Select the appropriate measurement mode and parameter settings based on the type and concentration range of gas to be measured.
Sampling and measurement: Insert the sampling tube or probe into the gas to be measured, start the instrument for measurement, wait for the instrument to respond, and read the measurement results. If continuous monitoring is required, an appropriate sampling frequency can be set.
Data recording: Record the measurement results in the corresponding table or document, including information such as time, location, gas type, and concentration, for subsequent analysis.
Shutdown and Cleaning
Turn off the instrument: After the measurement is completed, turn off the instrument, disconnect the power, clean and maintain the equipment.
Instrument cleaning: Clean the surface and light source of the instrument in a timely manner to avoid dust, dirt, or other pollutants affecting measurement accuracy. Gently wipe the surface of the instrument with a soft cloth or specialized cleaning tool.
Maintenance Procedures
periodic calibration
Regularly calibrate the instrument according to its frequency of use and requirements to ensure the accuracy of measurement results. Calibration is a crucial step in ensuring the accuracy of measurement results and helps eliminate instrument errors.
Sensor maintenance
Regularly clean the sensor to avoid dust, dirt, or other pollutants affecting measurement accuracy. Use a clean cotton ball dipped in a small amount of water or soapy water to gently wipe the sensor and wipe it dry in a timely manner. The detection hole filter should also be kept clean.
Pay attention to the service life of sensors, such as electrochemical sensors, which depend on the dryness of the electrolyte. If not used for a long time, low-temperature sealing can extend their service life. If the sensor ages or its sensitivity decreases, it should be replaced in a timely manner.
Air system inspection
Regularly inspect the pneumatic system to ensure there are no leaks or blockages. Check for leaks or blockages in the pipeline, regularly replace the air source filter to prevent impurities from entering the interior of the instrument.
Instrument storage
When storing instruments, choose a clean and room temperature location. Do not store instruments in high or cold places, and avoid direct sunlight and humid environments.
Keep the detector dry and away from moisture, rain, and corrosive liquids.
Operating Specifications
Operators should receive professional training and guidance, understand the basic principles, usage methods, and corresponding safety knowledge of the instrument.
During the operation, safety operating procedures should be followed to avoid accidents. If any abnormal situation or malfunction is found, it should be immediately stopped and professional personnel should be contacted for repair or replacement of parts.
Avoid collisions and drops of instruments, as rough use can damage sensitive components of the instrument.