1. Measurement accuracy: 1% 2 digits 2. Measuring range: AC voltage: AC40.0-300.0V, (or AC250.0-450.0V), the user chooses a suitable range according to the needs when ordering) AC current: AC0100.0A, current display resolution is 0.01A Power frequency: 45.0Hz-65.0Hz Power factor: 0.00-1.00PF Active power: the measurement range is 0-45000W, the display resolution between 0-9999.9W is 0.1W, and the rest is 1W Electric energy: the measurement range is 0-99999kwh, the minimum display resolution of 0-999.99kwh is 0.01kwh 1000.0-9999.9kwh minimum display resolution is 0.1kwh, 10000-99999kwh minimum resolution is 1kwh 4. Measuring speed: about 2 times per second 5. Dimensions: 548064 6. Installation method: rail type Use and Wiring Method 1. Connect the voltage to be measured to terminals 1 and 2 on the lower left of the meter. 2. The built-in transformer is wired according to the wiring diagram in Figure 1, and the wire of the measurement circuit passes through the round hole at the bottom of the instrument. You can choose freely, you can pass through the round hole on the bottom of the meter and come out from the top, or go through the round hole on the top of the meter and go out from the bottom. The different directions of penetration will not affect the measurement results. 3. The external transformer is wired according to the wiring diagram in Figure 2, and the two wires at the secondary end of the precision current transformer accompanying the meter are respectively connected to terminals 3 and 4 on the upper left of the meter , pass the wire of the measuring circuit through the round hole of the transformer. 4. The measurement parameters displayed by the instrument after the power is turned on. 5. When it is necessary to reset the electric energy measurement (when measuring from zero), press and hold the right button (RESET) on the instrument panel for 5 seconds (press and hold for 5 seconds) until the electric energy is displayed When it is 0, release the button, and the electric energy starts measuring from zero. The electric energy has the function of automatically saving data when the power is off, that is, when the measuring voltage is disconnected or the power is off, the meter will Automatically save the current test data, when the measuring power is reconnected, the meter will continue to accumulate on the original saved data.