1, standard rating IPN and rated output current ISN.
IPN refers to the standard rating that the current sensor can test. It is expressed by the effective value (Arms). The size of the IPN is related to the model of the sensor product. The ISN refers to the rated output current of the current sensor, which is generally 10~400mA. It may be different.
2, offset current ISO.
The offset current is also called residual current or residual current. It is mainly caused by the unstable operation state of the operational amplifier in the component or electronic circuit. When the current sensor is produced, at 25 ° C, IP = 0, the offset current It has been tuned to a minimum, but when the sensor leaves the production line, it will produce a certain amount of offset current. The accuracy mentioned in the product technical documentation has taken into account the effect of the increase in offset current.
3, linearity.
The linear current sensor determines the degree to which the sensor output signal (secondary current IS) is proportional to the input signal (primary current IP) within the measurement range. The current sensor linearity of Mianyang Weibo Electronic Co., Ltd. is better than 0,5. %.
4, temperature drift.
The offset current ISO is calculated at 25 ° C. When the ambient temperature of the electrode changes, the ISO will change. Therefore, it is important to consider the maximum change of the offset current ISO, where IOT refers to the current sensor performance table. The temperature drift value in .
5, overload.
The overload capability of the current sensor means that when a current overload occurs, the primary current will increase outside the measurement range, and the duration of the overload current may be short, and the overload value may exceed the allowable value of the sensor. The overload current value sensor Generally not measured, but it will not damage the sensor.
6, accuracy.
The accuracy of the current sensor effect sensor depends on the standard rated current IPN. At +25 °C, the measurement accuracy of the sensor has a certain influence on the primary current. At the same time, the influence of offset current, linearity and temperature drift must also be considered when assessing the accuracy of the sensor.
