Ways to improve the accuracy of DC voltage sensors

The classification and performance advantages of current transmitters are introduced as follows: The classification of current transmitters 　　 DC voltage sensors can play an important role in the research of aerospace, civil engineering, machinery, traffic engineering, railway safety monitoring and other fields. For example, in a small boiler system, the power can be controlled by controlling the current and voltage, so as to achieve a balance between energy saving and heating liquid. If the accuracy of the sensor is too low, it is likely that the water temperature does not meet the requirements or the water temperature is too high, resulting in a waste of resources. How to improve the accuracy of the DC voltage sensor? Here are several ways: 　　In addition to installing wiring, real-time calibration and calibration In addition to paying attention to the working environment of the sensor, the measurement accuracy can also be improved by the following methods: 1. The primary wire should be as fully as possible to fill the inner hole of the sensor without leaving any gap; 2. The primary wire should be placed in the center of the inner hole of the sensor. Try not to deviate as much as possible; 3. The current to be measured should be close to the sensor's standard rated value IPN, and should not be too different. If limited by conditions, there is only one sensor with a high rated value on hand, and the current value to be measured is much lower than the rated value. In order to improve the measurement accuracy, the primary wire can be wound a few more times to make it close to the rated value. . For example, when a sensor with a rated value of 100A is used to measure a current of 10A, in order to improve the accuracy, the primary wire can be wound nine times around the center of the inner hole of the sensor (normally, NPu003d1; one circle in the inner hole, NPu003d 2;...; Nine turns, NPu003d10, then NP×10Au003d100A is equal to the rated value of the sensor, which can improve the accuracy); 4. When the current value to be measured is IPN/5, at 25℃ It can still have higher accuracy.

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