HP / Agilent 44702B 13 BIT HIGH-SPEED VOLTMETER 64K BUFFER

The HP/Agilent 44702B is a 13-bit high-speed voltmeter module designed for rapid, precise voltage and resistance measurements within the HP 70000 Series Modular system. Operating at up to 100,000 readings per second with 64K buffer capacity, this plug-in unit captures and stores measurements in demanding data acquisition environments. It measures DC voltage, DC resistance, strain, temperature, and current (with external shunt), delivering 13-bit resolution across configurable ranges. DC voltage accuracy reaches ±(0.05% + 1.88 mV) on the 2.56 V range, while resistance accuracy varies by range—for example, ±(0.055% + 60 mΩ) on the 40 Ω range with 1 mA source current. The instrument requires one-hour warm-up for resistance measurements and maintains specified accuracy between 18 and 28 °C, with temperature coefficients applied outside this band. Current source compliance voltage exceeds 17 V for resistance operation. Housed in a modular form factor weighing approximately 2.4 kg, the 44702B integrates into HP 70000 Series architectures and pairs with HP 44711B or HP 44713B FET multiplexers for high-speed resistance measurement applications. Proper grounding and electrostatic discharge precautions are essential; qualified personnel should perform all internal adjustments and maintenance.