Usage of portable gas detectors
1, Before use
① Before homework, carefully read the corresponding user manual for the gas detector and familiarize yourself with the machine's performance and operating methods.
② Check if the battery level is sufficient, and if it is found to be low, replace the battery in a timely manner.
③ Check if there are any debris blocking the intake air filter, which needs to be cleaned or replaced.
④ During the self check during the startup process, you should listen for the accuracy of the graded alarm sound and light alarm and vibration alarm. If they do not meet the requirements, they should not be used and should be corrected immediately.
⑤ Press and hold the start button for three seconds during startup to enter the self check state. Observe whether the low and high alarm values set by the detector are accurate. If they do not meet the requirements, they should not be used and should be corrected immediately. During the self check during the startup process, you should listen for the accuracy of the graded alarm sound and light alarm and vibration alarm. If they do not meet the requirements, they should not be used and should be corrected immediately.
⑥ After starting up in fresh air conditions, observe whether the initial values are accurate. If the displayed values are not accurate, it is strictly prohibited to use them and should be corrected immediately.
2, During use
① When using a portable gas detector, it should be worn as close as possible to the mouth and nose, such as the front collar of clothes, shirt pockets, etc. It is strictly prohibited to place the alarm in difficult to see areas such as pockets, which may affect the detection value.
② During use, collision should be avoided as much as possible, which may cause abnormal detection data.
③ Gas detector sensors and other components are precision components. After adjusting the instrument, do not open the cover casually. During use, pay attention to waterproofing and preventing impurities from entering to prevent data anomalies.
④ If there are abnormal situations such as continuous flashing of indicator lights, sudden absence of numerical display on the display screen, failure to display numerical values in areas with obvious gas exceeding standards, and large differences during use, the operation should be stopped immediately. Evacuate to a fresh air area to observe the problem and promptly eliminate it. Otherwise, it is strictly prohibited to continue using.
⑤ In cases where gas detection exceeds the standard, the operation shall comply with national and company regulations:
Gas on-site operation (excluding confined spaces) concentration and operation time requirements:
When the concentration of CO in the air is 24ppm, normal operation can be carried out;
When the concentration of CO in the air is 40ppm, it can work for 1 hour;
When the concentration of CO in the air is 80ppm, it can work for half an hour;
When the concentration of CO in the air is 160ppm, only 15-20 minutes of operation are allowed, with a 2-hour interval between each operation.
⑥ If dizziness, tinnitus, or blurred vision occur during homework, the work should be stopped immediately and evacuated to a fresh air area (pay attention to the air flow direction and choose an upper air outlet). If the situation is serious, emergency response should be initiated immediately to carry out self rescue and other rescue.
3, After use
① After using the portable gas detector, hold down the shutdown button and the display screen will show a 5-second countdown. After the countdown is completed, the LCD will display "off". If the instrument does not display, it will shut down. It is strictly prohibited to directly deduct the battery and force the shutdown.
② After the instrument is shut down, the dust adhering to the surface should be cleaned and the equipment should be cleaned properly.
③ When the instrument is not working for a long time, it should be turned off and placed in a dry, dust-free environment that meets the storage temperature.
④ The gas detector implements a dedicated person management system to prevent loss and other situations that may result in missing instruments and affect normal use.
