The basic steps to use a handheld hydrogen leak detector are as follows:
1. Pre-check and boot: First check the appearance of the instrument for damage, ensure that the battery is sufficient, and then boot according to the instructions.
2. Calibration: Calibrate before each use to ensure the accuracy of measurement results. This usually involves calibration with a standard sample of hydrogen at a known concentration.
3. Setting: According to the need to detect the environment and requirements, set the appropriate alarm threshold and unit (such as ppm or %LEL).
4. Detection: Put the instrument near or into the suspected leak area, move slowly, and observe the instrument reading and alarm.
5. Record and analysis: record the test results, if there is excessive, it is necessary to record the exceeded location and concentration in detail, further analyze the cause and take measures.
6. Shutdown and maintenance: After use, correctly turn off the instrument according to the instructions, and carry out necessary cleaning and maintenance.
Setting the alarm concentration value of the handheld hydrogen leak detector should be based on the following points:
1. Safety standards: refer to industry safety standards and regulations, such as workplace safety limits, usually the lower explosive limit (LEL) of hydrogen is 4%, and the alarm value can be considered at 1%LEL or lower when the initial setting.
2. Application environment: Depending on the risk level of the use scenario, such as in high-risk areas such as chemical plants or hydrogen energy stations, more stringent alarm thresholds may be required.
3. Instrument characteristics: According to the performance and accuracy of the handheld hydrogen leak detector, as well as its recommended alarm setting range, select the appropriate alarm point.
4. Practical requirements: Considering the purpose of detection, if it is preventive maintenance, a lower alarm value may be set to detect potential problems early; If it is an emergency response, a high alarm value may be required for a faster response.
In short, setting the alarm concentration value should take into account the safety, environment, equipment performance and actual needs, and if necessary, consult professionals or follow the manufacturer's recommended value.
