The Advantest R6581 is a precision digital multimeter engineered for high-accuracy measurement across DC and AC domains. It delivers 8.5-digit resolution with True RMS AC capabilities, making it suitable for electronics testing, maintenance, and calibration work. The instrument covers DC voltage (100 mV to 1000 V), DC current (100 nA to 1 A), 2-wire and 4-wire resistance, frequency, and temperature measurements. Its exceptional DC voltage accuracy—as low as 5 ppm + 0.2 ppm on the 10 V range—and sophisticated 4-wire resistance measurement with selectable source current modes (10 mA down to 100 nA) enable precision characterization of components and circuits. The R6581 incorporates automatic thermoelectromotive force cancellation in resistance mode and achieves low noise performance across all measurement functions at NPLC100 integration.
Technical Specifications
Measurement Functions
• DC Voltage, DC Current, 2-wire and 4-wire Resistance
• True RMS AC Voltage and AC Current (Model R6581)
• Frequency and Temperature
• Display: 8.5 digits
DC Voltage Accuracy (1 year)
• 100 mV: 7 ppm + 10 ppm
• 1 V: 6 ppm + 1 ppm
• 10 V: 5 ppm + 0.2 ppm
• 100 V: 7 ppm + 1 ppm
• 1000 V: 7 ppm + 0.2 ppm
4-Wire Resistance Accuracy (1 year)
• 10 Ω to 100 Ω: 12–14 ppm + 5–20 ppm
• 1 kΩ: 8 ppm + 0.5 ppm
• 10 kΩ to 100 kΩ: 15–50 ppm + 2–10 ppm
• 1 MΩ to 100 MΩ: 50–500 ppm + 10 ppm
• 1 GΩ: 5000 ppm + 10 ppm
Input Characteristics
• DC Voltage Input Resistance: >10 GΩ
• 4-Wire Source Current (high power): 10 mA; (low power): 1 mA, 100 µA, 10 µA, 1 µA, 100 nA
– Key Features
• True RMS AC measurement for voltage and current on Model R6581
• Temperature coefficient: 0.01–1.2 ppm/°C (DC voltage range-dependent)
• Noise floor at NPLC100: 0.05–0.1 ppm (DC voltage)
• Automatic thermoelectromotive force cancellation in resistance measurements
• Burden voltage shunt resistance selectable by current range
– Typical Applications
Precision component characterization, electrical standards calibration, semiconductor device verification, and high-accuracy circuit troubleshooting.
