34972 A LXI Data Acquisition Switch

The 34972A mainframe has three slots that accept interchangeable plug-in modules. A selection of eight different switch and control modules is available. The mainframe offers up to ninety-six matrix crosspoints or one hundred twenty single-ended channels. The built-in digital multimeter has a resolution of six and a half digits (twenty-two bits). The 34972A measures eleven different input signals including temperature with thermocouples, RTDs and thermistors; DC or AC volts or current; two- or four-wire resistance; frequency; and period.^[2][3]

The 34972A operates by connecting external signals through plug-in switch and control modules inserted into the mainframe slots. The internal digital multimeter measures the selected signals, and the instrument can log the data to internal memory or to an external USB storage device. A graphical Web interface provides remote control and monitoring over a network. The unit supports standalone operation without a connected computer: a USB flash drive can be used to transfer configuration files and logged data.^[2][3]

The 34972A includes built-in one-gigabit LAN and USB 2.0 interfaces for connection to a PC. A USB memory port on the front panel allows direct data storage and transfer via a flash drive. The instrument accepts all plug-in modules designed for the 34970A and is backward compatible with the 34970A SCPI command set. Free BenchLink Data Logger software provides a Microsoft Windows interface for test configuration, real-time data display, and analysis.^[2][3]

The 34972A is used for data logging, temperature monitoring, voltage and current measurement, resistance measurement, and frequency/period measurement. Typical applications include environmental chamber monitoring, device characterization, and process validation. The instrument is suited for both laboratory and field use due to its compact form factor and standalone logging capability.^[2][3]