The comprehensive error of electric energy measurement is composed of the synthetic error of the voltage transformer, the synthetic error of the current transformer, the error of the watt-hour meter, and the measurement error caused by the voltage drop of the secondary conductor of the voltage transformer. Among these four errors, the measurement error caused by the voltage drop of the secondary transformer of the voltage transformer is often the largest. The excessive comprehensive error of electric energy measurement is a common problem in electric energy measurement. The verification rules and related technical regulations of the electric energy metering device are stipulated for the error caused by the voltage drop of the secondary circuit of the voltage transformer, and must be measured accurately and quickly.
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1. Not displayed after booting
Solution: If the battery does not have electricity, please connect the charger first. If it still does not work, please stop using it immediately, contact the manufacturer, please do not open the instrument by yourself, otherwise you may not be able to enjoy the repair service.
2. Data instability during the test
Solution: Please check if the wiring is correct, whether the wiring is in good contact, and whether there is any special interference around.
