Yokogawa 2560A High Output Precision DC Calibrator

The Yokogawa 2560A is a high-output precision DC calibrator engineered for accurate calibration of DC voltage and current measuring instruments, as well as temperature sensors across calibration laboratories, manufacturing, and R&D environments. The instrument delivers stable, precise DC sourcing with simultaneous thermocouple and RTD simulation capabilities, accommodating analog meters, digital multimeters, thermometers, and temperature transmitters. Operation combines intuitive front-panel controls - dedicated dials and switches with seven-segment LED displays - alongside three computer interfaces (GP-IB, Ethernet, USB) for seamless integration into automated test systems.

Technical Specifications

• Range: −1224 V to +1224 V


• Accuracy: ±50 ppm (180 days)


• Stability: ±10 ppm/h at 1 V range


• Maximum output: ±122.4% of range DC Current Output


• Range: −12.2400 A to +36.720 A


• Single unit maximum: 36.72 A


• Dual unit parallel maximum: 73.44 A


• Accuracy: ±70 ppm (180 days)


• Stability: ±20 ppm/h at 1 mA range Resistance Output


• Range: 1 Ω to 400 Ω Temperature Sensor Simulation


• Thermocouples: 10 types (R, S, B, J, T, E, K, N, C, A) plus user-defined


• RTDs: Pt100 and user-defined


• Reference junction compensation: internal, external (Pt100), or manual modes Display


• Standard: 5.5 digits, ±120000 count


• High resolution: 6.5 digits, ±1200000 count Output Functions


• Divider: stepped output (25%, 50%, 75%, 100%)


• Deviation control: 2% or 5% incremental steps


• Sweep: 8, 16, 32, or 64 second sweep times

Key Features

• Five-digit precision with optional six-digit high-resolution mode for enhanced measurement resolution


• Parallel operation capability - two units deliver 73.44 A combined current output


• Multiple reference junction compensation modes for flexible RTD/thermocouple testing


• Output divider and deviation functions for comprehensive linearity and point-to-point validation

Typical Applications

• Calibration of DC analog and digital meters


• Multimeter verification (analog and digital)


• Thermometer and temperature transmitter certification


• Thermocouple and RTD sensor characterization

Compatibility & Integration GP-IB (IEEE 488.2), Ethernet, and USB interfaces enable direct integration into automated test equipment. Operating temperature range: +5°C to +40°C. Dimensions: 426 mm × 177 mm × 400 mm; weight: approximately 13 kg.