Agilent/Keysight 44701A

The Agilent/Keysight 44701A is a 5.5 to 3.5 digit integrating voltmeter module engineered for precision measurement in high-noise environments. This plug-in card integrates with the HP 3852A Data Acquisition/Control Mainframe and 447xx series multiplexers, delivering DC voltage, AC voltage, and resistance measurements with selectable resolution and noise rejection. Extended measurement capability includes AC/DC current via external shunt, strain, and temperature sensing across RTD, thermistor, and thermocouple types.

Technical Specifications

• DC Voltage: 30 mV, 300 mV, 3 V, 30 V, 300 V


• AC Voltage: 200 mV, 2 V, 20 V, 200 V


• Resistance: 30 Ω, 300 Ω, 3 kΩ, 30 kΩ, 300 kΩ, 3 MΩ (2-wire and 4-wire)


• Maximum Input: 350 Vpeak or 250 Vdc between terminals or chassis Accuracy


• DC Voltage: 0.008% (best case: ±0.008% + 8 µV on 3 V range)


• AC Voltage: 0.5%


• Resistance: 0.015%

Key Features

• Adjustable noise rejection for stable readings in industrial environments


• Selectable resolution from 5.5 to 3.5 digits


• Dual measurement input paths: multiplexer or rear panel terminals


• Support for thermocouple, RTD, and thermistor temperature measurement


• Compact module form factor: 18 × 10 × 2 in

Typical Applications Data acquisition systems requiring high-accuracy DC/AC voltage and resistance measurement. Temperature monitoring with standard sensors. Current measurement via external shunt configuration. Multi-channel measurement through 447xx multiplexer integration.

Compatibility & Integration Designed exclusively for the HP 3852A mainframe and compatible 447xx series multiplexers. Operates as a dedicated measurement card within the 3852A chassis.