Analysis of Testing Principles and Technical Advantages of ZX1030A Single-Phase

I. Testing Principles

The ZX1030A single-phase standard source is a high-precision, multifunctional instrument for testing energy metering devices. Its core testing principles are based on the integration of Digital Signal Synthesis (DDS) technology, Complex Programmable Logic Devices (CPLD), and an embedded RAM system, forming a highly stable signal output architecture. The instrument achieves precise control through the following technologies:

DDS Technology: Utilizes Direct Digital Synthesis to generate highly stable, low-distortion voltage and current signals, with a frequency adjustment range of 45Hz–65Hz (resolution: 0.1Hz), accurately simulating real-world grid conditions.

CPLD and RAM Collaborative Control: Optimizes hardware logic and high-speed data processing to ensure phase accuracy (±0.1°) and rapid response, while supporting multitasking operations.

PWM Digital Power Amplification: Employs a 300kHz carrier frequency-driven power amplifier with high efficiency (>90%), maintaining low distortion (≤0.5%) and minimal temperature rise even at high-current outputs (up to 100A).

Closed-Loop Calibration System: Integrates a 0.1-class precision digital multifunction standard meter to monitor voltage, current, power, and other parameters in real time. Dynamic calibration and error correction via software algorithms ensure output stability (≤0.05%/120s).

II. Core Advantages

High Precision and Wide Range Coverage
a. Voltage output: 0–280V continuously adjustable; current output: 5mA–100A with 6 selectable ranges (0.025A–100A), meeting full-range testing needs from low-power meters to industrial-grade energy meters.
b. 0.1-class instrument accuracy and ±0.2% indicator error, combined with an optional 2×10⁻⁷ high-stability oscillator, enable calibration of 1.0-class and lower meters, complying with international IEC standards.

Intelligence and Multifunctional Integration
a. Multitasking Capability: Built-in three-terminal independent voltage circuits (each ≤15VA) and six-meter-position synchronous detection support parallel testing of multiple meters, enhancing efficiency.
b. Communication Expandability: Equipped with an RS485 interface for testing meter communication protocols (e.g., DL/T645, Modbus). Optional software enables advanced functions like daily timing error and time interval error analysis.
c. User-Friendly Interface: A 6-inch LCD screen displays real-time parameters (voltage, current, power, phase, frequency), with intuitive operation and data logging/readback support.

Efficient and Reliable Design Architecture
a. Thermal Management and Protection: PWM technology reduces component heating, complemented by overvoltage, short-circuit, and open-circuit protections for prolonged stable operation.
b. Energy Efficiency: Total power consumption ≤300VA, achieving 40% higher efficiency than traditional linear power supplies, aligning with green lab standards.

Expandability and Compatibility
a. Optional OCXO high-precision clock source (50kHz pulse output) supports smart meter clock calibration and daily error analysis.
b. Global grid compatibility (45Hz–65Hz frequency adjustment) adapts to diverse international metering standards.

      III. Typical Applications

The ZX1030A is widely used in power metering institutions, meter manufacturers, and third-party testing labs for:

Error verification, start-up/creep tests, and clock accuracy testing of single-phase energy meters.

Communication protocol consistency validation for smart meters.

Metering performance evaluation under harmonic influence (waveform distortion ≤0.5%).

Stability testing in wide temperature/humidity environments (20±5°C, RH≤85%).

IV. Conclusion

The ZX1030A single-phase standard source, with its precision signal synthesis technology, intelligent testing system, and industrial-grade reliability, stands as a highly efficient tool in the energy metering field. By integrating hardware performance with software flexibility, it not only fulfills comprehensive testing requirements for 1.0-class and lower meters but also provides future-proof compatibility for smart grid advancements. This instrument is an ideal choice for enhancing metering verification efficiency and ensuring fairness in power transactions.