Agilent/Keysight 34972A

The Keysight 34972A is a modular LXI data acquisition and switching unit built around a 6 1/2-digit (22-bit) DMM, delivering integrated measurement and signal routing for automated test and data logging. Its three-slot mainframe accepts plug-in switch and control modules, configurable for up to 60 two-wire channels, 120 single-ended channels, or 96 matrix crosspoints. The instrument scans up to 250 channels per second with 0.004% basic DC voltage accuracy and measures 11 signal types: DC/AC volts, DC/AC current, 2-wire and 4-wire resistance, frequency, period, and temperature via thermocouples, RTDs, and thermistors.

Technical Specifications

• Mainframe: 3 configurable module slots


• Internal DMM Resolution: 6 1/2-digit (22-bit)


• Measurement Functions: 11 input signal types including temperature, DC/AC volts, DC/AC current, 2-wire and 4-wire resistance, frequency, and period


• Scanning Speed: Up to 250 channels/second


• DC Voltage Accuracy: 0.004% basic


• Non-Volatile Memory: 50,000 readings


• Channel Density Options: Up to 60 two-wire channels, 120 single-ended channels, or 96 matrix crosspoints


• Alarm Outputs: 4 TTL outputs with per-channel Hi/LO alarm limits


• Per-Channel Configuration: Independent function, scaling (Mx+B), and alarm threshold settings

Key Features

• Built-in signal conditioning eliminates external module requirements for many applications


• 8 different switch and control plug-in module options


• Relay maintenance counter tracks every closure for predictable service intervals


• Screw-terminal connections on all modules


• Backward compatible with 34970A series modules and SCPI command set


• Gigabit Ethernet (10/100/1000 BaseT) and USB 2.0 connectivity


• USB memory port for direct data export


• Web-based graphical interface for remote setup and control

Typical Applications Automated test systems, environmental monitoring, production data logging, multi-channel signal acquisition, and temperature measurement networks.

Compatibility & Integration Full SCPI compliance enables integration with existing test frameworks. BenchVue software simplifies instrument control and test automation. Native LAN and USB support connect directly to PCs and networks without additional I/O cards.