The Keysight U3402A is a 5½ digit dual-display digital multimeter engineered for fundamental DC, AC, and AC+DC voltage and current measurements up to 750 V and 12 A respectively. This benchtop instrument delivers 120,000-count resolution with basic DC voltage accuracy to 0.012%, supporting both 2-wire and 4-wire resistance measurement to 300 Ω. Beyond standard functions, it integrates frequency analysis, continuity testing, and diode characterization with selectable measurement speeds (Slow, Medium, Fast) to balance resolution against acquisition rate.
The bright VFD dual display enables simultaneous parameter viewing, streamlining troubleshooting workflows. On-board math functions include dBm, Relative (REL), Min/Max logging, Compare, Hold, and Percentage calculations. A Kensington lock slot provides physical security for laboratory and field environments. RS232 connectivity is available for calibration purposes. The multimeter ships with a test lead set and is specified for indoor operation in low-condensation areas.
Technical Specifications
• DC Voltage Measurement: Up to 750 V
• AC Voltage Measurement: Up to 750 V
• DC Current Measurement: Up to 12 A
• AC Current Measurement: Up to 12 A
• Resistance Measurement: Up to 300 Ω (2-wire and 4-wire)
• Resolution: 120,000 counts
• Basic DC Voltage Accuracy: 0.012%
• Frequency Measurement: Yes
• Input Impedance: <100 pF capacitance in parallel (VDC 1000 V range)
– Key Features
• Dual bright VFD display for concurrent two-parameter viewing
• Three selectable measurement speeds: Slow, Medium, Fast
• Math functions: dBm, Relative (REL), Min/Max, Compare, Hold, Percentage
• Continuity and diode test modes
• Kensington lock slot for security
• RS232 interface for calibration
• Included test lead set
– Typical Applications
• General-purpose electrical testing in laboratories and field service
• Voltage and current verification in circuit design and troubleshooting
• Resistance and continuity diagnostics
• Frequency analysis in signal verification
– Compatibility & Integration
RS232 connectivity supports calibration workflows. Test leads are supplied.
