1. Simultaneously verify the errors of active and reactive energy meters, and at the same time verify the errors of the main and auxiliary meters and automatically calculate the estimated value of standard deviation.

2. The electrical instruments and transmitters such as voltage, current, power, power factor, phase and frequency can be verified by comparison method.

3. Identify 48 common three-phase three-wire and 96 three-phase four-wire wiring errors in the four phase limits, and display the hexagonal diagram of any wiring.

4. The self-calibration function of the clamp meter can ensure the long-term accuracy and stability of the clamp-type transformer. Each phase self-checks each other to ensure the long-term accuracy and stability of the instrument.

5. It can measure the 2nd to 51st harmonics of three-phase voltage and current, and can store all harmonic data.

6. Measure the electrical parameters of each phase on site (U, I, P, Q, Φ, F)

7. It can display the waveforms of three voltages and three currents at the same time.

8. The secondary load of PT and CT can be measured.

9. Store all measurement data of 10,000 meters, including working parameters, to facilitate post-mortem analysis.

10. Support U disk, the verification data can be downloaded through U disk and serial port upgrade software.

11. It can communicate with PC, and it is very convenient to interface with the original database and management system. Can be equipped with "electric energy meter management system" software to achieve paperless office.

12. High brightness, high definition, high resolution 5.7" (320*240) TFT color liquid crystal display.

13. The T9 Chinese character input method commonly used in mobile phones is adopted, which is extremely convenient for Chinese character input.

14. Wide working power supply AC 85~480V, and can be powered by internal battery (no external charger is required for charging) dual selection.

15. The system adopts a high-speed and high-precision digital multiplier, and simultaneously measures all parameters such as active (reactive) power, voltage, current, frequency, phase, etc., and performs software correction on all parameters.

16. The instrument has no potentiometer, which completely prevents the error change of the instrument due to external reasons such as transportation, and greatly improves the stability and reliability of the system.

17. The system adopts the digital true reactive power measurement technology pioneered in China. It truly makes reactive power measurement: not affected by voltage and current imbalance, phase angle asymmetry, frequency changes, etc., and the reactive power accuracy is increased to 0.1% for the first time in China.

18. The accuracy of the electrical energy (0.1% or 0.05%) is guaranteed within the temperature range of -20℃～+40℃.

19. Four-quadrant energy measurement.

20. It can be equipped with 0.2 class 5A clamp (including opening and closing non-repeatability error, contact error, external magnetic field interference error, angle difference, etc.).

21. Support small current measurement <5mA, which is convenient for the identification of wiring errors when there is no load in the first inspection

22. It can be equipped with 20A, 100A, 500A, 1000A clamps to directly measure the comprehensive error of low-voltage measurement, and cooperate with 5A clamps to directly measure the CT transformation ratio.

23. The voltage is automatically shifted from 30 to 480V, and the current is directly input 5A.

24. For each type of wiring, display the hexagonal diagram after error identification, which can be used as a hexagonal diagram for line checking training.

25. Provide error correction function to facilitate error calibration (password required).

26. Read the data function of the multi-function energy meter

27. Check the constant of the electric energy meter

28. High-precision plastic mold chassis design, light and beautiful.