The HP/Agilent 3455A is a microprocessor-controlled digital multimeter delivering 5.5 or 6.5-digit resolution for benchtop and systems measurement applications. It measures DC voltage, AC voltage, and resistance with exceptional accuracy and noise rejection, making it ideal for precision laboratory and industrial work. The instrument features fully guarded circuitry, internal auto-calibration, and dual-mode resolution for measurements approaching 1 part per million in DC and resistance.
## Technical Specifications
**Measurement Functions & Ranges**
• DC Voltage: 0.1 V to 1000 V with 1 µV sensitivity
• AC Voltage: 1 V to 1000 V (standard True RMS, 30 Hz to 1 MHz); optional Average Converter supports 30 Hz to 250 kHz
• Resistance: 0.1 kΩ to 10 MΩ in six ranges, 2-wire and 4-wire modes
**Resolution & Display**
• 5.5 or 6.5-digit digital display
• High-resolution mode enables DC and resistance measurements exceeding 1 ppm accuracy
**Reading Rates**
• DC ranges: up to 24 readings/s
• Resistance: up to 12 readings/s
• AC Fast Mode: up to 13 readings/s (frequencies above 300 Hz)
• Remote operation supports variable rates including 24, 22, 6, and 5 rdg/s depending on configuration
**Accuracy (90-day, 23°C ±5°C)**
• DC Voltage—1 V range: ±(0.006% + 3 to 4 counts); 10 V: ±(0.005% + 3 counts); 100/1000 V: ±(0.007% + 3 counts)
• Resistance (4-wire)—1 kΩ: ±(0.0035% + 5 counts); 10 kΩ: ±(0.0060% + 5 counts); 100 kΩ: ±(0.0035% + 6 counts); 1000 kΩ: ±(0.0135% + 5 counts); 10,000 kΩ: ±(0.1000% + 5 counts)
• AC Voltage—30 Hz to 20 kHz: ±(0.05% + 50 counts); 20 kHz to 100 kHz: ±(0.5% + 100 counts)
• Temperature Coefficient (10 V DC): ±(0.002% + 0.05 counts)/°C
**Noise Rejection**
• DC ranges: greater than 60 dB normal mode rejection
• AC voltage: greater than 140 dB normal mode rejection
## Key Features
• Auto Calibration (Auto Cal) digitally corrects DC voltage and resistance circuits against internal references
• True RMS AC converter handles sinusoidal and complex signals with crest factors to 7:1 at full scale
• Fully guarded circuit design minimizes measurement errors in noisy environments
• Math functions included
## Typical Applications
Precision DC and AC measurements in research labs, production testing, and systems integration where sub-ppm accuracy and high noise rejection are required.
## Compatibility & Integration
Remote operation capable with configurable reading rates for automated test systems and data acquisition setups.
