1. Core Functional Architecture: A Comprehensive Testing Suite
The YC99T-5C is not merely a measurement tool; it is an integrated power laboratory housed in a rugged, portable chassis. It combines a high-stability power source with a precision standard meter.

1.1 Integrated Standard Source and Metering
By integrating a three-phase signal generator with a reference standard, the YC99T-5C allows technicians to simulate various grid conditions without relying on the actual load of the site. This “Closed-Loop” testing ensures that the meter under test (MUT) is evaluated against a known, stable reference.
1.2 Multi-Functional Measurement Capabilities
Beyond basic energy error testing, the system provides a holistic view of the electrical environment:
- Harmonic Analysis: Capability to analyze harmonics up to the 63rd order.
- Vector Diagramming: Real-time visual representation of voltage and current phase relationships.
- Waveform Distortion: Monitoring and recording of THD (Total Harmonic Distortion) to ensure power quality.
2. Key Technical Specifications and Performance Metrics
For National Labs and Meter Manufacturers, technical parameters define the reliability of the equipment. The YC99T-5C stands out with its high-fidelity output and measurement range.
2.1 Precision Class and Stability
The device is engineered for elite performance:
- Accuracy Class: Available in 0.05 or 0.1 levels, meeting stringent international standards (IEC 60736).
- Stability: Features a power stability of better than 0.01%/2min, essential for long-term calibration tasks.
2.2 Range and Versatility
Parameter Range / Value
Voltage Output 57.7V to 480V
Current Output 1mA to 120A
Frequency Range 45Hz to 65Hz
Phase Angle 0° to 359.99°
3. Advanced Features for Industrial Applications
What sets GENY apart from competitors is the user-centric design that addresses the “pain points” of field engineers.
3.1 Intuitive User Interface (UI)
The YC99T-5C features a 7-inch color touch screen, designed for high visibility even in outdoor environments. The interface allows for:
- One-Touch Calibration: Pre-set automated test sequences for standard meter types.
- Real-time Data Visualization: Instantaneous display of U, I, P, Q, S, and PF for all three phases.
3.2 Data Management and Connectivity
In the era of Digital Transformation, data portability is crucial:
- Internal Storage: Large memory capacity to store thousands of test records.
- PC Synchronization: Seamless data export via RS232 or USB for further analysis and report generation.
- External Printer Support: Direct connection for on-site printing of verification certificates.
4. Application Scenarios: Where Precision Meets Portability
The YC99T-5C is engineered for versatility across the entire energy value chain.
4.1 Utility Field Inspections
Power grid companies utilize the YC99T-5C to detect energy theft, faulty wiring, and aging meters in the field, significantly reducing Non-Technical Losses (NTL).
4.2 Meter Manufacturer Quality Control
For manufacturers like Landis+Gyr or EDMI, the YC99T-5C serves as a reliable tool for spot-checking production batches and ensuring compliance before shipping.
4.3 Metrology & National Laboratories
With its 0.05 class accuracy, it acts as a secondary standard for calibrating other field-testing equipment, ensuring traceability to national standards.
5. Conclusion: Why the YC99T-5C is the Professional’s Choice
Choosing the right test equipment is an investment in the long-term integrity of your metering system. The YC99T-5C reflects GENY’s commitment to “Empowering Global Energy Metering” by offering a perfect balance of laboratory precision, rugged portability, and advanced digital features.