The core technology of GDDO-20T microcomputer three-phase AC sampling device calibrator is a high-precision power frequency AC collector composed of digital signal processor (DSP) and 16-bit high-speed analog-to-digital converter. The signal part of the signal source adopts DSP and 16-bit high-speed digital-to-analog converter to form a controllable sine wave and distorted wave signal source.
Functional characteristics
1. It can semi-automatically or manually check the basic errors of various power frequency meters (voltmeter, ammeter, power meter, frequency meter, power factor meter and phase meter) in the power system, as well as the changes caused by voltage, current, waveform and power factor.
2. Can semi-automatically or automatically check the basic errors of AC sampling devices and electrical measuring transmitters (voltage transmitter, current transducer, power transmitter, frequency transmitter, power factor transmitter and electric energy transmitter), as well as the changes caused by voltage, current, waveform and power factor.
3. The power supply part can generate 2 ~ 3 1 harmonic distortion wave, and the number, frequency and amplitude of harmonics and the phase of harmonics to the fundamental wave can be programmed.
4. The working frequency band of the power amplifier is 40 Hz ~ 1 kHz, which has good linearity. The current power amplifier is a constant current source and the voltage power amplifier is a constant voltage source. Because of its light weight, the device is more suitable for field calibration.
5, equipped with RS-232 interface. Through the upper computer software (optional), the device can be automatically or manually tested by computer control, and the results can be processed and managed.
6. Equipped with large-capacity nonvolatile memory, which can store the original test data of 300 tested instruments for reference and uploading.
7. Calibrate the electric energy meter according to the load point or optional point detected by the electric energy meter. -Wuhan Guodian Gao Xi High Voltage Electric Co., Ltd.