How to detect and calibrate the portable compound gas detector
Portable compound gas detector is an instrument that can detect multiple gases at the same time, usually including combustible gas, toxic gas and oxygen. In order to ensure the accuracy and reliability of the instrument, it is necessary to carry out regular testing and calibration.
Testing refers to testing and evaluating the sensitivity and accuracy of the instrument by using standard gas or gas samples with known concentration. Testing usually needs to be carried out in a special laboratory or test equipment and operated by professional technicians.
Calibration refers to the use of standard gas with known concentration to check and adjust the measurement results of the instrument to ensure its accuracy and reliability. Calibration usually needs to be carried out in a special laboratory or test equipment and operated by professional technicians.
Detection refers to the use of standard gas or gas samples with known concentration to test the performance of the instrument. Detection can be divided into open circuit detection and closed circuit detection. Open circuit detection refers to the detection when the instrument is not in contact with the measured gas, which is used to test the sensitivity and response time of the instrument. Closed-circuit detection refers to the detection when the instrument is in contact with the measured gas, which is used to test the accuracy and stability of the instrument.
Calibration refers to the use of standard gas with known concentration to calibrate the measurement results of the instrument. Calibration can be divided into primary calibration and secondary calibration. Primary calibration refers to the calibration of the overall performance of the instrument with standard gas, which is used to determine the measuring range and accuracy of the instrument. Secondary calibration refers to the use of standard gas to calibrate the functions of the instrument, which is used to determine the measurement accuracy and stability of the instrument.
During testing and calibration, we should pay attention to the following points: 1. Use correct standard gas and gas samples; 2. Operate according to the instructions of the instrument; 3. Observe the safety operation rules to avoid harm to personnel and the environment; 4. Conduct regular testing and calibration to ensure the accuracy and reliability of the instrument.
In a word, the detection and calibration of portable compound gas detector is very important, which can ensure the accuracy and reliability of the instrument, thus ensuring the safety of people and the environment. Therefore, it is necessary to carry out regular testing and calibration, and follow the correct operating procedures. In addition to regular detection and calibration, the following points should be noted when using portable compound gas detector.
1. Avoid using in high temperature, strong magnetic field and strong electric field.
2. Avoid direct contact with chemicals such as strong acid and alkali.
3. Clean the instrument regularly to prevent pollution and blockage.
4. Replace the filter and sensor regularly to ensure the accuracy and reliability of the instrument.
5. Comply with local regulations and standards to ensure the correct use and safety of the instrument.
