Medium and high temperature anemometers are widely used in industrial production, environmental monitoring, aerospace and other fields to measure the velocity of airflow at different temperatures. Due to the potential impact on its performance in different temperature ranges, precise calibration and effective precision control are crucial to ensure the accuracy of measurement results. This article will introduceMedium high temperature anemometerCalibration methods and precision control measures.

1、 Calibration method

1. Calibration using standard wind tunnel method

The standard wind tunnel method is a commonly used calibration method. In a standard wind tunnel, the known wind speed is generated and stably controlled by the wind tunnel system. The calibration process involves placing it in a wind tunnel, measuring it under different wind speed conditions, and comparing it with standard wind speed values. The standard wind speed value is measured by known reference instruments in the wind tunnel, and the calibration process needs to be repeated multiple times under different temperature conditions.

2. Calibration using reference equipment method

The reference device method uses a calibrated high-precision anemometer as a standard to calibrate the measured anemometer. In this method, the measured anemometer and reference device are first placed under the same environmental conditions for synchronous measurement, and the difference in readings between the two is compared. Make necessary adjustments based on differences to ensure that the reading of the measured anemometer is consistent with the standard value.

3. Environmental condition method calibration

When calibrating in medium to high temperature environments, the influence of ambient temperature cannot be ignored. In order to eliminate the influence of temperature changes on measurement results, it is necessary to control the temperature of the testing environment and ensure a stable state during the measurement process. In certain special environments, temperature control rooms or heated wind tunnels can be used for calibration. This method is typically applied to anemometers in high or low temperature scenarios.

2、 Precision control

Precision control is crucial for ensuring the reliability of medium and high temperature anemometers in practical use. Here are some precision control measures:

1. Multi point calibration

The error is not only related to temperature and wind speed, but also to different working ranges. To ensure comprehensive precision control, calibration should be performed at multiple wind speed points. Through multi-point calibration, it can be ensured that the measurement accuracy can be effectively guaranteed throughout the entire measurement range, reducing errors under a single wind speed.

2. Temperature compensation

Temperature changes are an important factor affecting measurement accuracy. In order to reduce the impact of temperature fluctuations on measurement results, temperature sensors are usually equipped and temperature compensation technology is adopted. By monitoring and adjusting the temperature in real-time, the measurement accuracy can be significantly improved. Especially in high-temperature environments, precise temperature compensation is crucial for improving accuracy.

3. Regular calibration and maintenance

In order to maintain its long-term accuracy, regular calibration and maintenance should be carried out. The accuracy of the equipment will change over time and with increasing frequency of use. By regularly calibrating equipment, changes in equipment performance can be detected in a timely manner, and adjustments and repairs can be made. In addition, regular inspection of sensors and other components for wear or damage is also a necessary step to ensure accuracy.

The calibration method and accuracy control of medium and high temperature anemometers are key to ensuring the accuracy of measurement results. By using calibration methods such as standard wind tunnel method, reference equipment method, and environmental condition method, errors can be effectively adjusted and corrected. Precision control measures such as multi-point calibration, temperature compensation, periodic calibration, and environmental stability control can help improve measurement accuracy under different environmental conditions. To ensure the long-term reliability of measurement results, regular calibration and maintenance are necessary, especially when used under harsh temperature conditions, where precision control is particularly important.