1. Stability evaluation: the average value can reflect the average oil fume concentration level in a period of time, which is helpful to evaluate whether the oil fume emission has been stabilized in an acceptable range. By monitoring the average value, we can know whether the average value of oil fume concentration exceeds the relevant safety and health standards for a long time.
2. Long-term effects: Excessive oil fume concentration may have adverse effects on human health, especially in a high-concentration environment for a long time. By observing the average value, the potential risks under long-term exposure can be evaluated and necessary measures can be taken to protect the health of personnel.
3. Monitoring the trend: Observing the average value is also helpful to find the trend of smoke and dust emission, such as whether there is a gradual increase or decrease trend. Monitoring the trend can provide important information for the management and improvement measures of soot emission. There are several reasons for not looking at the instantaneous value when detecting the concentration of oil fume:
1, the instantaneous value fluctuates greatly: the concentration of oil fume is influenced by many factors, including cooking methods, types of ingredients, working conditions of exhaust equipment, etc. Therefore, the soot concentration may fluctuate greatly in a short time, and a single instantaneous value may not accurately reflect the soot emission level of the whole process.
2. Short time span: Instantaneous value can only provide instantaneous data and cannot reflect the situation in a long time range. In the detection of oil fume concentration, we usually need to consider the long-term exposure, not just the value at a certain moment.
3. Unstable data: the instantaneous value is easily influenced by various environmental factors and measurement errors, such as wind speed and equipment accuracy, which may lead to fluctuations or errors in the instantaneous value. Therefore, it may bring inaccurate results to evaluate the oil fume concentration only by instantaneous value.