Clamp Meter Unit Uni-T UT276A+ — True RMS multimeter with AC/DC current, voltage, resistance, capacitance, frequency

The Uni-T UT276A+ clamp meter is a portable True RMS instrument that integrates a current clamp with multimeter measurement functions. It measures AC and DC current using clamp jaws and provides voltage, resistance, capacitance and frequency readings, plus diode and continuity tests. The unit is designed for on-site electrical troubleshooting, installation verification and routine maintenance across residential, commercial and light-industrial environments.

Advantages

The clamp meter delivers True RMS measurement for more accurate readings on non-sinusoidal and distorted waveforms. Its integrated jaw-style current sensing enables contactless AC/DC current measurement without disconnecting conductors, while the multimeter functions cover common electrical parameters needed for diagnostics. The compact, handheld format improves portability and access in confined spaces and the combination of features reduces the need to carry separate instruments.

Suitable for

• Measuring AC and DC current in lighting circuits, branch circuits and equipment feeders
• Voltage verification and troubleshooting on electrical outlets, panels and control circuits
• Resistance and continuity checks for wiring, fuses and connections
• Capacitance measurement for passive component checks and verification
• Frequency measurements for motors, drives and supply monitoring

When it may not be suitable

The instrument is intended for diagnostic and maintenance use in residential, commercial and light-industrial settings; it may not be appropriate where specialized high-precision laboratory calibration is required. For very high current systems or where permanent monitoring is needed, dedicated fixed current sensors or power analyzers may be more suitable.

Key specifications

• True RMS measurement for accurate readings on non-sinusoidal waveforms
• Clamp-type current measurement for AC and DC conductors
• Voltage measurement for AC and DC circuits
• Resistance measurement and continuity test with audible indication
• Capacitance measurement range for passive components
• Frequency measurement for electrical system diagnostics
• Diode test function
• Handheld, portable design with jaw opening suitable for typical single- and multi-conductor cables

How to use

Place the clamp jaws around a single conductor to measure current; ensure only one conductor is inside the jaws to avoid erroneous readings. For voltage, resistance, capacitance or frequency, use the meter’s leads and select the appropriate function on the rotary switch. Observe standard safety practices: de-energize circuits where possible when measuring resistance or continuity, keep fingers behind the probe guards, and follow any local electrical safety regulations. Read and follow the manufacturer’s instructions for range selection and function limits.

What to consider before purchase

• Required measurement ranges for current, voltage, resistance, capacitance and frequency in your typical tasks
• Need for True RMS measurements if working with non-sinusoidal or distorted waveforms
• Jaw opening size relative to the conductors you will measure
• Durability and portability requirements for field or workshop use

Usage recommendations

Use the clamp function for non-contact current checks and the multimeter functions for detailed circuit diagnostics. Verify single-conductor placement in the jaws, respect the meter’s specified measurement limits, and perform routine verification against a calibrated reference if measurements are critical.