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How to Make a High-precision Current Sensor Output Voltage Signal?

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Update time : 2021-10-27 17:53:04
With the development of science and technology and the trend of green conservation and recycling, the demand for precise control and measurement is increasing. In the power industry, the technical requirements for current and voltage detection are becoming more and more stringent, and the accuracy requirements are getting higher and higher. HANGZHI high-precision current sensors and voltage sensors have emerged. HANGZHI sensor is a closed-loop sensor based on fluxgate technology. It has the characteristics of high stability (low temperature drift, good long-term stability), high precision (up to 10ppm), high linearity (<1ppm), etc., which can satisfy various customers’ strict requirements, widely used in power analysis, high-stability power supplies, medical equipment (MRI gradient amplifiers, MRI), aviation ships, rail transit, electric motors, batteries and capacitor testing that require high-precision measurement of current and voltage.
HANGZHI high-precision current sensor ranges from 10A to 20000A. Commonly used models in the field of high-precision measurement are AIT60-SG, AIT200-SG, AIT600-SG, AIT1000-SG, AI1500-SG, AIT2000-SG, etc., meanwhile, each model also has voltage and current signal output options.
The current signal output type sensor converts a higher test current into a smaller current signal output through a certain conversion ratio, so as to connect to power analyzers, digital multimeters, oscilloscopes and other test instruments.
Users who need voltage signal output can directly order HANGZHI voltage output current sensor series which have a built-in precision resistor to achieve voltage signal output. Or order a current sensor with current signal output, and convert the output current signal into a voltage signal output through an external measuring resistor. The accuracy of the voltage output current sensor will be affected by the accuracy and temperature drift of the selected precision resistor. Therefore, when selecting an external measuring resistor, several factors need to be considered:
01 Accuracy: Need to match the resistance of the same accuracy
02 Temperature coefficient (thermal coefficient)
03 Power loss (W)
04 Resistance: Its accuracy will directly affect the accuracy of the measurement. It is similar for the thermal coefficient. When current flows through the resistor, the temperature rise of the resistor itself causes an increase in resistance. An increase in the ambient temperature will also cause an increase in the resistance value.
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