HP / Agilent 3458A Digital Multimeter, 8 Digit

The HP/Agilent 3458A is an 8½-digit digital multimeter engineered for precision measurement in automated test systems, calibration laboratories, and research environments. It delivers benchmark-class accuracy across DC voltage, AC voltage, current, resistance, frequency, period, and waveform digitizing functions. With 10 nV DC sensitivity, 10 GΩ input resistance on low ranges, and sub-ppm linearity, the 3458A excels in applications demanding metrological-grade performance and traceable measurements.

– Technical Specifications

Measurement Functions:
• DC Voltage: 0.1 V to 1000 V, 10 nV sensitivity
• AC Voltage: 10 mV to 1000 V, 1 Hz to 10 MHz bandwidth, 100 ppm accuracy (45 Hz–1 kHz)
• DC Current: 100 nA to 1 A, 1 pA sensitivity, up to 1,350 readings/sec
• AC Current: 100 µA to 1 A, 10 Hz to 100 kHz, up to 50 readings/sec
• Resistance: 10 Ω to 1 GΩ, 10 µΩ to 100 Ω sensitivity, 2.2 ppm midrange accuracy
• Frequency: 1 Hz to 10 MHz, 0.01% accuracy
• Period: 100 ns to 1 sec, 0.01% accuracy
• Digitizing: 16 to 24-bit resolution, up to 100,000 samples/sec

DC Voltage Performance:
• 24-hour accuracy: 0.5 ppm + 0.05 ppm @ 10 V; 2.5 ppm + 0.1 ppm @ 1000 V
• 1-year accuracy: 8 ppm + 0.05 ppm @ 10 V; 10 ppm + 0.1 ppm @ 1000 V
• Input resistance: 10 GΩ (≤10 V), 10 MΩ ± 1% (100 V, 1000 V)
• Linearity: 0.1 ppm; RMS internal noise: 0.01 ppm
• Overvoltage protection: ±1200 V pk (HI to LO), ±350 V pk (LO to Guard)

AC Voltage Performance:
• True RMS, 2 MHz+ bandwidth; 100 ppm absolute accuracy (45 Hz–1 kHz), 170 ppm to 20 kHz
• Input impedance: 1 MΩ with <140 pF

Resistance & Offset Compensation:
• Offset-compensated ohms: 10 Ω to 100 kΩ ranges
• Open-circuit voltage: 12 V (10 Ω–10 MΩ), 5 V (100 MΩ, 1 GΩ)

– Key Features

• 8½-digit resolution for metrological-grade measurements
• Programmable via Agilent Multimeter Language (ML) for automated test integration
• Transfer capability: 0.1 ppm for calibration traceability
• High-speed digitizing with configurable bit depth and sample rate
• Dual-function frequency and period measurements with 0.01% accuracy

– Typical Applications

• Precision calibration and standards verification
• Automated component and systems testing
• Research-grade DC and AC measurements
• Waveform digitization and signal analysis

– Compatibility & Integration

Programmable control and data acquisition via Agilent Multimeter Language (ML) simplifies integration into test systems and reduces development time.