The Solartron/Schlumberger 7081 is a high-precision 8.5-digit digital voltmeter engineered for calibration, metrology, and research applications requiring exceptional measurement accuracy. It delivers DC voltage accuracies as low as 0.5 ppm + 0.3 ppm of full scale, with transfer accuracy of 0.3 ppm of full scale. The instrument measures DC voltage, true RMS AC voltage (AC component only and AC+DC), resistance, and performs eight types of ratio measurements against reference inputs or constants.
Technical Specifications
• Voltage Ranges: 0.1 V to 1000 V (DC and AC)
• Resistance Ranges: 0.1 Ω to 1000 MΩ; 0.1–100 Ω use 4-terminal technique; 10 Ω–1000 MΩ use ratio method
• DC Voltage Accuracy: 0.5 ppm + 0.3 ppm of full scale
• Transfer Accuracy: 0.3 ppm of full scale
• Scale Length: Up to 140,000,000 (DC voltage and resistance); up to 1,400,000 (true RMS AC)
• DC Voltage Display Formats: 3, 4, 5, 6, 7, 8 × 9 digits (3 and 4 × 9 via remote control)
• AC Voltage Display Formats: 3, 4, 5, 6 × 9 digits
• Input Protection: 1 kV AC and DC maximum (no damage)
• Accuracy Stability: Performance predictable from 90 days to 9 years using square-root-year relationship
– Key Features
• True Ohms facility eliminates thermal EMF and external current errors up to 10 V
• All measurements averaged over selectable integration time
• Data storage with history file: up to 1500 unformatted readings or 500 formatted readings
• Built-in measurement processing capabilities
• RS232C (V24) and IEEE-488 (GP-IB) interfaces for system integration
• All measurement facilities standard; no internal options required
– Typical Applications
Calibration labs, precision reference standards, resistance measurement protocols, voltage transfer standards, and automated measurement systems.
– Compatibility & Integration
RS232C and IEEE-488 connectivity supports remote operation and integration into automated test benches and data acquisition systems.
