The KDJD-A is an intelligent SF6 density relay calibrator designed for field testing. Powered by a mixed-signal high-speed single-chip microcontroller, it integrates A/D, D/A, and reference voltage circuits for stable, high-precision operation. It automatically calibrates both pointer and electronic SF6 density relays, measuring 1–3 groups of contacts (NO/NC) with real-time capture of actuation values. The 3.5-inch color LCD displays current pressure, 20°C equivalent pressure, and temperature, solving on-site calibration challenges. With built-in data storage (100 sets), RS-232 communication, and a rechargeable battery, it provides a comprehensive, reliable solution for SF6 equipment maintenance.

• Mixed-signal single-cycle high-speed MCU core ensures rich resources and strong data processing capability.
• Automatic calibration for both pointer and electronic SF6 density relays, eliminating manual intervention.
• Measures response and recovery values for 1–3 relay contacts (NO/NC), compatible with new and old relay types.
• 3.5-inch 320×240 color LCD with Chinese interface for intuitive, user-friendly operation.
• Simultaneous display of current pressure, 20°C equivalent pressure, and ambient temperature for accurate compensation.
• Fully automated testing process eliminates human-induced errors and ensures measurement consistency.
• Stores up to 100 test records with non-volatile memory for traceability and historical data access.
• RS-232 interface enables PC data upload and automatic test report generation.
• Quick-connect pipeline design minimizes SF6 gas consumption and ensures leak-proof operation.
• Multiple adapter compatibility allows non-disassembly calibration of most SF6 density relays.
• Built-in rechargeable battery (DC12V) expands usability for off-grid field operations.
• Built-in self-calibration function ensures long-term measurement accuracy and reliability.

• Measurement Accuracy: 0.2 class
• Pressure Measurement Range: 0~1.0000MPa (SF6 relay); 0~10MPa (general pressure calibration), Resolution: 0.0001 MPa
• Temperature Measurement Range: -20°C~+60°C, Accuracy: ≤±0.1°C
• Operating Temperature: -20°C~+60°C
• Power Supply: AC220V±10% 50Hz; DC12V rechargeable battery
• Display: 3.5-inch 320×240 color LCD
• Data Storage: 100 sets of measurement data (non-volatile)
• Communication Interface: RS-232
• Printing: Optional desktop micro pin printer (built-in or external)
• SF6 Relay Compatibility: Single alarm, single lock, single alarm & lock, single alarm & double lock
• Main Unit Dimensions: 360mm × 240mm × 110mm (L×W×H)
• Net Weight: 3.0kg (main unit), Gross Weight: 12kg (with packaging)
• Working Principle: Built-in pressure generation system, no external gas source required
• Calibration Objects: SF6 density relays, normal temperature pressure gauges, and 20°C gas pressure gauges