Advantest R6441B 4½‑Digit Multi‑functional Digital Multimeter

The Advantest R6441B is a 4½-digit digital multimeter engineered for precision measurement across DC, AC, and specialized test functions. Dual-channel input with dual display capability enables simultaneous measurements, making it ideal for R&D laboratories and production test environments. True RMS AC measurement, AC + DC combined measurements, and frequency analysis deliver versatility for complex signal characterization. Battery operation extends field deployment capability.

– Technical Specifications

Display & Sampling
• 4.5-digit resolution
• Maximum display: 199,999 (2.5 samples/second); 1,999 (80 samples/second)
• Selectable sampling rates: 2.5 times/second or 80 times/second

Voltage Measurement
• DC ranges: 20 mV to 1,000 V
• AC ranges: 200 mV to 700 V
• DC accuracy: ±0.04% ±5d (20 mV–200 V); ±0.04% ±2d (2,000 mV)
• AC accuracy: ±0.6% ±35d (20–45 Hz); ±0.2% ±30d (45 Hz–20 kHz); ±0.5% ±30d (20–30 kHz); ±4% ±50d (30–100 kHz)
• Input impedance: ≥1 GΩ (20–200 mV); 10–11.1 MΩ ±1% (≥20 V); 1.1 MΩ ±10% AC input
• DC maximum allowable: ±500 V; AC maximum: 800 Vrms / 1,100 Vpeak / 10⁷ VHz
• Noise rejection: 60–120 dB normal mode (FAST/MID/SLOW)
• AC crest factor: 3:1 at full scale

Current Measurement
• DC ranges: 20 mA to 10 A
• AC ranges: True RMS capable
• DC accuracy: ±0.2% ±5d (20 mA); ±0.6% ±5d (200 mA)
• Terminal resistance: ≤1.5 Ω (20 mA–2,000 mA); ≤0.04 Ω (10 A)
• Overcurrent protection: 0.5 A/250 V (low ranges); 15 A/250 V (10 A range)

Additional Functions
• Resistance, diode test, conductance, dBm measurement, frequency analysis
• AC voltage filter: 300 Hz to 100 kHz
• AC response time: ~4 seconds (typical)
• Resolution: 1 µV to 100 mV (voltage); 1 µA to 1 mA (current)

– Key Features

• Dual-channel, dual-display architecture for parallel measurement workflows
• True RMS AC + DC combined measurement capability
• Frequency measurement and dBm analysis
• Field-portable with battery operation option
• Selectable sampling rates for dynamic range optimization
• High input impedance (≥1 GΩ DC) minimizes circuit loading
• Temperature-compensated accuracy (23 ± 5°C, ≤85% RH specification)

– Typical Applications

• Component and circuit characterization in R&D
• In-circuit diagnostics and troubleshooting
• Production line acceptance testing
• AC/DC power supply validation
• Frequency and conductance analysis

– Compatibility & Integration

Dual-channel design supports simultaneous measurement of related parameters, streamlining test sequences in both bench and automated environments.