The Keysight/Agilent/HP 3457A is a 6.5-digit digital multimeter engineered for precision measurement and automated testing in research, development, and system integration environments. It delivers DC voltage accuracy to 5 ppm, sensitivity down to 10 nV, and configurable display resolution from 3.5 to 7.5 digits. The instrument supports nine measurement functions—DC/AC voltage and current, resistance, frequency, and period—with reading rates up to 1350 readings per second at 3.5-digit resolution.
Technical Specifications
• Display Resolution: 3.5 to 6.5 digits, extendable to 7.5 digits
• Reading Rate: 1 reading per 2 seconds to 1350 readings/sec at 3.5 digits
• DC Voltage Ranges: 30 mV to 300 V
• DC Voltage Sensitivity: 10 nV
• DC Voltage Input Resistance: 10 GΩ (≤3 V ranges); 10 MΩ ±1% (30 V and 300 V ranges)
• DC Voltage Accuracy (90-day): 0.004% + 365 counts @ 30 mV; 0.0017% + 6 counts @ 3 V; 0.005% + 6 counts @ 300 V
• AC Voltage Ranges: 30 mV to 300 V (True RMS, 1 MHz bandwidth)
• AC Voltage Best Accuracy: 0.13% + 0.116 counts @ 30 mV–30 V (100 Hz–20 kHz)
• AC Voltage Input Impedance: 1 MΩ ±1% shunted by <90 pF
• Resistance Ranges: 30 Ω to 3 GΩ (2-wire and 4-wire)
• Resistance Sensitivity: 10 µΩ to 1 kΩ
• Resistance Best Accuracy: 0.0035% + 6 counts @ 3 kΩ and 30 kΩ ranges
• Frequency Range: 10 Hz to 1.5 MHz (voltage input); 10 Hz to 100 kHz (current input)
• Frequency Accuracy: 0.05% (10–400 Hz); 0.01% (400 Hz–1.5 MHz)
– Key Features
• Math functions: PASS/FAIL limit testing, NULL, SCALE, THERMISTOR linearization, DB, DBM, % ERROR, RMS FILTER, SINGLE POLE FILTER, STATISTICS (two simultaneously)
• Auto-calibration for Ohms mode (gain, offset correction) and input attenuation
• Programmable front/rear terminal switching for dual-input measurements without external scanner
• Buffer memory for high-speed data acquisition
• DC current, AC current, and AC+DC measurement modes
– Interfaces & Integration
• HP-IB (Hewlett-Packard Interface Bus) connectivity
• VOLTMETER COMPLETE and EXTERNAL TRIGGER outputs for instrument synchronization
• Data formatting: ASCII, 16-bit binary, or 32-bit binary
