The HP/Agilent 3435A is a 3-1/2 digit autoranging digital multimeter engineered for general-purpose electronic test and measurement. This five-function instrument delivers DC voltage, AC voltage, DC current, AC current, and resistance measurements with a bright 0.3-inch red LED display featuring function and range annunciation.
## Technical Specifications
**Display & Resolution**
• 3-1/2 digit, 7-segment red LED display, 0.3-inch character height
• Automatic polarity sensing and display
• Function and range annunciation included
**Voltage Measurement**
• DC Voltage: ±200 mV to ±1200 V ranges; 100 μV sensitivity on 200 mV range; 10 MΩ ±1% input resistance; ±(0.05% of reading + 2 digits) accuracy on 200 mV range; maximum input 1200 V (DC + peak AC); 1.6 second response time
• AC Voltage: 200 mV to 1200 V ranges; average-responding, RMS-calibrated converter; 100 μV sensitivity on 200 mV range; 5 MΩ resistance input impedance; ±1.5% of reading ±3 digits (30–50 Hz); ±0.3% of reading ±3 digits (50 Hz–20 kHz); maximum input 1700 V (DC + peak AC), 107 Vrms at 10 kHz
**Current Measurement**
• DC Current: 200 µA to 2000 mA ranges; ±(0.2% of reading + 2 digits) accuracy on 200 µA range; 250 V rms input protection; 120 dB common mode rejection at 50/60 Hz ±0.1% with 1 kΩ unbalance
## Key Features
• Autoranging and manual range selection for enhanced measurement flexibility
• Fast response times: 1.6 seconds for voltage measurements, <0.7 seconds for current
• High input resistance (10 MΩ DC, 5 MΩ AC) minimizes circuit loading
• Dual-range AC frequency response: 30 Hz to 100 kHz
• Temperature-compensated accuracy specifications
## Typical Applications
• General electronic circuit troubleshooting and verification
• Precision voltage and current monitoring in lab and field environments
• Resistance and continuity testing
• Signal analysis across audio and low-frequency RF ranges
