Keysight (formerly Agilent T&M) 44465A Digital I/O Assembly

The HP 3421A is suitable for small data acquisition projects. It can be configured with several different computers into a variety of systems designed for low- to medium-size applications.

• 30-channel scanning
• LCD display with power and error indicators
• Measurements: DCV, ACV, 2/4-wire ohms, frequency, temperature
• DCV ranges: 300 mV to 300 V; accuracy: ±(0.009% reading + 3 counts),  5½ digits
• Autorange
• A/D converter with 5½, 4½, 3½ digits
• 30-reading storage buffer
• Reading rates: 2 to 35 readings/second
• Type T thermocouple built in
• Interface: HP-IL standard, HP-IB optional
• High-level command set
• The following assemblies can be added:
  • 8-bit input/output digital assembly
  • 10-channel analog multiplexer/actuator assembly with thermocouple compensation
  • breadboard assembly for custom circuitry