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AC and DC Voltmeter/Ammeter with Digital Display
Digital display meters include voltmeters, ammeters, frequency meters, 4~20mA passive meters, temperature controllers, and teaching instruments for measuring the electrical signals.
Program overview
This product series is a digital display instrument IC integrated with TRMS (2KHz), LCD display driver, built-in UART, DSP, PWM port, 4-20mA passive meter and temperature controller which can achieve AC and DC voltage, AC and DC current. It supports instantaneous value and true effective value measurement. There are additional functions such as communication, alarm, transmission, and switch output. The internal integration of advanced calibration algorithms can save the customer\'s calibration time when the measurement accuracy is met. The calibration coefficients can be stored inside the chip to save external memory.
Program advantages

  • High measurement accuracy with integrated 24-bit ADC, and stable measurement up to 0.01 level

  • Integrated TRMS. External rectifier device is not needed for AC measurement

  • Highly integrated, single-chip solution

  • Integrated DSP unit supports digital calibration

High measurement accuracy with integrated 24-bit ADC, and stable measurement up to 0.01 level

Integrated TRMS. External rectifier device is not needed for AC measurement

Highly integrated, single-chip solution

Integrated DSP unit supports digital calibration

Features

  • Measurement accuracy: up to 0.1 level

  • Display range: -19999-19999

  • Conversion rate is 3 times per second

  • Display mode: LCD/LED driver

  • AC rectification: Up to 2kHz

  • Communication mode: UART interface with integrated standard Modbus protocol

  • Alarm output: 4-channel isolated switch alarm output. Configuration is flexible

  • Operating voltage range: 2.4-3.6V

  • Calibration method: Digital calibration with internal memory can be used

Application diagram
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