The 3405771 is a versatile documenting process calibrator designed for calibrating, troubleshooting, and maintaining process instrumentation. It provides broad workload coverage by measuring and sourcing DC voltage up to 300V and 15V respectively, DC current up to 110 mA (measure) and 22 mA (source), and resistance up to 10 kΩ. This calibrator also supports a wide range of RTD and thermocouple types for temperature simulation and measurement, and can measure and source frequency up to 50 kHz. Key features include a 26V loop power supply, data logging for up to 8000 readings, and a USB interface for transferring results to a PC. Its rugged design and automated procedure capabilities make it an ideal all-in-one tool for technicians needing to ensure fast, consistent calibrations in industrial environments.