Three-Phase Electricity Meter Aging and Calibration System

The Automated Three-Phase Electricity Meter Aging and Calibration System is an essential infrastructure for meter manufacturing quality control. This setup utilizes a high-precision ZN-D3000 Power Source, capable of delivering synchronized, adjustable three-phase voltage and current outputs to simulate diverse grid conditions. The bench is engineered for high-density testing, featuring a vertical meter rack with modular connectors that support simultaneous aging of multiple smart meter units.

During the aging cycle, the system monitors key performance indicators including dielectric strength, register accumulation (walking test), and communication protocol stability. The control interface allows operators to fine-tune phase angles, harmonic distortion, and load levels, ensuring that the PBT-reinforced meter housings and internal electronic components can withstand thermal stress and electrical fluctuations.

Furthermore, the integration of real-time data logging and an automatic trip protection mechanism ensures safety and traceability throughout the 24/7 testing process. This comprehensive testing regime is critical for meeting international standards (such as IEC or ANSI) and ensuring a 15-year service life in demanding environments. By utilizing this professional aging bench, manufacturers can significantly reduce the infant mortality rate of electronic components and guarantee the long-term reliability of the billing data.

1. Power-on Aging

The entire meter is continuously powered on and running.

Verification:

Power module stability

Reliability of MCU/metering chip during long-term operation

No system crashes, restarts, or abnormal resets

Common method:

Powered on at rated voltage

Continuous operation for a long period (without power interruption)

2. Display Function Aging (LCD/LED Aging)

LCD all segments illuminated (All segments ON) or cyclical display

Check for:

Broken segments, missing segments

Display ghosting

Backlight stability (if applicable)

What your previous customer mentioned:
"Powering on and displaying all segments"
is essentially this aging test.

3. Communication Interface Aging (if applicable)

For meters with communication functions:

RS485 / IR / PLC / RF / NB-IoT / LoRa, etc.

During aging:

Timed polling

Parameter reading

Check for communication packet loss and anomalies

4. Load/Metering Function Powered Aging (Optional, higher configuration)

Load applied during aging:

Small current or a certain percentage of the rated current

Verification:

Continuous operation stability of the metering chip

Whether pulse output is abnormal

⚠️ Note:

Most factory aging test benches do not perform full load testing.

True accuracy verification is completed on the calibration bench.

5. Button/Relay/Switch Action Aging (if applicable)

Prepaid meters / meters with relays:

Relay activation/deactivation

Button trigger detection

To prevent early failure

6. Anomaly Monitoring

Monitoring during aging:

Overvoltage/undervoltage

Overcurrent (if under load)

Communication anomalies

Device disconnection