The KDJD-A is an intelligent, automated SF6 density relay calibrator engineered for high-precision field testing. Powered by a 32-bit ARM microcontroller and high-speed signal processing chip, it operates 10x faster than conventional single-chip systems, enabling real-time capture of relay actuation values. It features automatic pressure-temperature compensation, converting on-site readings to the standard 20°C equivalent pressure, eliminating manual calculation errors. Equipped with an 8.4-inch color touchscreen, built-in thermal printer, and 1000-set data storage, it supports both pointer and electronic density relay calibration with minimal SF6 gas consumption, making it a comprehensive, eco-friendly solution for power industry maintenance.

• 32-bit ARM core with high-speed signal processing for high integration and data processing efficiency.
• Automatic pressure measurement and 20°C value conversion for dynamic temperature-pressure compensation.
• Hands-free automated testing for both pointer and electronic SF6 density relays.
• Measures response and recovery values for 1–3 relay contacts (NO/NC compatible) for comprehensive testing.
• Quick-connect pipeline design minimizes SF6 gas consumption, reducing costs and environmental impact.
• Imported core components and multi-adapter compatibility enable non-disassembly calibration of most relays.
• Built-in self-calibration function ensures long-term measurement accuracy and instrument reliability.
• Rechargeable battery power (DC8.4V) expands usability for off-grid field operations.
• RS232 (optional USB) communication enables PC data upload and automatic test report generation.
• 8.4-inch capacitive touchscreen with Chinese interface for intuitive, user-friendly operation.

• Measurement Accuracy: Better than 0.2 class
• Pressure Measurement Range: 0~1.0000MPa (SF6 relay); 0~10MPa (general pressure calibration)
• Pressure Resolution: 0.0001 MPa
• Temperature Measurement Range: -40°C~120°C, Accuracy: ≤±0.5°C
• Operating Temperature: -20°C~80°C
• Power Supply: AC220V±10% 50Hz; DC8.4V rechargeable battery (≤10W power consumption)
• Display: 8.4-inch industrial color capacitive touchscreen
• Data Storage: 1000 sets of measurement data (non-volatile)
• Communication Interface: RS232 standard; USB optional
• Printing: Built-in micro thermal printer for on-site data output
• SF6 Relay Compatibility: Single alarm, single lock, single alarm & lock, single alarm & double lock
• Dimensions: 460mm × 380mm × 180mm
• Net Weight: 10.0kg, Gross Weight: 20kg (with packaging)
• Working Principle: Built-in steel cylinder automatic pressurization (no external gas source required)