Digital Power Meter technical indicators

Rated voltage
The root mean square value of the sine wave voltage that the Digital Power Meter can withstand for a long time. Below this voltage, the absolute value of the measurement error of the power meter should be less than the value obtained by multiplying the relative error corresponding to the nominal accuracy level by the rated voltage. For example, the voltage measurement accuracy level of the power meter is 0.1 and the rated voltage is 1000V. Then, when the voltage is less than 1000V, the absolute value of the error should be less than 1000x0.1%=1V.
Rated current
The root mean square value of the sine wave current that the Digital Power Meter can withstand for a long time. Below this current, the absolute value of the measurement error of the power meter should be less than the value obtained by multiplying the relative error corresponding to the nominal accuracy level by the rated current. For example, the current measurement accuracy of the power meter is 0.1 and the rated current is 10A. Then, when the current is less than 10A, the absolute value of the error should be less than 10x0.1%=0.01A.