1. Linearity
The linearity determines the degree to which the output signal (secondary current IS) of the sensor is proportional to the input signal (primary current IP) in the measurement range.
2. Overload
The overload capability of current sensor means that when current overload occurs, the original side current will still increase beyond the measurement range, and the duration of overload current may be very short, while the overload value may exceed the allowable value of the sensor. The overload current value sensor can not be measured generally, but will not cause damage to the sensor.
3. Standard rated IPN and rated output current ISN
IPN refers to the standard rated value that current sensors can test. It is expressed by the effective value (A.r.m.s). The size of IPN is related to the type of sensor products. ISN refers to the rated output current of the current sensor, which is generally 10-400 mA. Of course, it may vary according to some models.
4. Accuracy
The accuracy of Hall effect sensor depends on standard rated current IPN. The measurement accuracy of the sensor has a certain influence on the primary current at + 25 C. At the same time, the influence of offset current, linearity and temperature drift must be taken into account when evaluating the accuracy of the sensor.
5. Temperature drift
The offset current ISO is calculated at 25 C. When the ambient temperature around the Hall electrode changes, the ISO will change. Therefore, it is important to consider the maximum variation of offset current ISO, in which IOT refers to the temperature drift in the current sensor performance meter.
6. offset current ISO
The offset current is also called residual current or residual current. It is mainly caused by the unstable operation of operational amplifier in Hall element or electronic circuit. The offset current of the current sensor has been lowest when it is manufactured at 25 C and IP = 0, but when the sensor leaves the production line, it will produce a certain offset current. The accuracy mentioned in the product technical documentation has taken into account the effect of increasing offset current.
