Automation of Electricity Meters Test Benches
Comprehensive automated calibration and verification system for mass production of electronic electricity meters.
The objective of this project was to automate all metrological operations performed on verification benches. Technicians' workload was streamlined, human errors eliminated, and laboratory throughput multiplied. Automation covers adjustment, parameterization, and metrological calibration of energy meters and internal clocks. The automation was implemented across 7 test benches manufactured by EMH (Germany) and MTE (Switzerland).
Stage 1: Dedicated Software "EMH Windows"
A powerful multi-threaded application capable of simultaneously testing up to 80 electricity meters in parallel.
- Automated adjustment of electricity meters and internal real-time clocks (EMS, GEM, G3A, G1A, EPQS, EPQM, LZQM)
- Automated mass parameterization of static meters
- Calibration and verification protocols generation for all meter models
- Calibration protocols for internal clocks synchronized with reference standards
- Automated quality control and database archiving
Stage 2: Hardware Modification & Satellite GPS Synchronization
The hardware upgrade enabled automated calibration of meters internal real-time clocks. A dedicated commuter circuit was engineered to select reference error signals either from standard power meter or satellite GPS reference. The 100 kHz reference frequency from satellite-synchronized GPS clock is routed directly to the test bench, achieving an uncertainty of only 0.04 seconds per 24 hours.
Verification Laboratory Test Benches
