Keysight / Agilent / HP U1272A Handheld Digital Multimeter

The Keysight U1272A is a 4.5-digit handheld digital multimeter engineered for field and bench electrical measurements across utility, industrial, and service environments. Its 30,000-count dual display with analog bar graph delivers true RMS readings at up to 7 readings per second, supported by 10,000-point internal data logging and 300-hour battery life. The unit combines rugged IP54 design with CAT III 1000 V and CAT IV 600 V safety ratings for demanding fieldwork.

Technical Specifications Voltage & Current Measurement

DC voltage: 30 mV to 1000 V, ±0.05% basic accuracy

AC voltage: 30 mV to 1000 V, 45 Hz to 65 kHz bandwidth

DC current: 300 µA to 10 A with tiered overload protection

AC current: 300 µA to 10 A, 45 Hz to 2 kHz standard bandwidth Resistance, Capacitance & Frequency

Resistance: 30 Ω to 300 MΩ with Smart Ω offset compensation

Capacitance: 10 nF to 10 mF

Frequency: 99.999 Hz to >1 MHz

Temperature (thermocouple): −200 °C to 1372 °C, J and K type Additional Functions

Auto-diode testing with continuity beeper

dBm and dBV measurements with selectable impedance

Peak detect captures transients to 250 µs

Low-pass filter for variable frequency drive troubleshooting

Smooth function for stable reading output

Key Features ZLOW Function: Nominal 2 kΩ input impedance eliminates ghost and stray voltages through coupling dissipation - critical for precision work on high-impedance circuits. Smart Ω: Offset compensation removes false readings from DC bias and leakage current, improving accuracy on in-circuit resistance measurements. Peak Detect: 250 µs capture bandwidth isolates transient events in switched power systems and industrial controls. Low Pass Filter: Attenuates harmonics and high-frequency noise for valid measurements across variable frequency drives without spectral distortion.

Typical Applications

Field service and preventive maintenance on three-phase industrial equipment

Commissioning and troubleshooting of VFD-driven motor circuits

In-circuit resistance and capacitance diagnostics on PCBs with active biasing

Temperature monitoring via thermocouple interface

Data logging of slow transients with 10,000-point memory

Connectivity & Integration Optional wireless connectivity via U1177A Bluetooth adapter and U1173A IR-USB cable enables remote data logging and PC integration for test documentation and trend analysis.