Clamp Meter Unit UT223A — True RMS, AC/DC Current up to 400A, Auto Range, Multimeter Functions

Clamp meter Unit UT223A is a handheld electrical test instrument that combines clamp-style current measurement with standard multimeter functions. It delivers True RMS readings for both AC and DC currents within a clamp range up to 400 A, plus voltage, resistance and continuity checks. The unit features auto-ranging and a backlit display to support field diagnostics and safe measurements without interrupting the circuit.

Advantages

The UT223A offers True RMS measurement for accurate readings on non-sinusoidal waveforms and mixed loads. Its clamp jaw enables current measurement up to 400 A without disconnecting conductors, while auto-range simplifies operation across different signal levels. Integrated multimeter functions — including voltage, resistance and continuity — reduce the need to carry separate instruments. A backlit LCD and compact, handheld form factor make the tool practical for on-site troubleshooting and maintenance tasks.

Suitable for

• Measuring AC and DC load currents up to 400 A without breaking the circuit
• Field diagnostics and troubleshooting of residential and commercial power circuits
• Maintenance checks on motors, pumps and HVAC systems
• Verification of voltage, resistance and continuity in electrical installations

Key specifications

• True RMS measurement for AC and DC currents
• Clamp current range: up to 400 A
• Auto-ranging functionality
• Multimeter functions: AC/DC voltage, resistance, continuity
• Backlit LCD for low-light visibility
• Handheld, clamp-style form factor for single-handed operation

How to use

Switch the meter to the required measurement mode (current, voltage, resistance or continuity) and allow the instrument to auto-range if available. For current measurement, open the clamp jaw and position a single conductor centrally within the jaw before closing it; avoid clamping around multi-conductor cables. Read the True RMS value on the display and observe the backlight for visibility in dim conditions. For voltage and resistance measurements, connect the test leads to the appropriate terminals and follow standard safety practices, ensuring the circuit is de-energized where required.

Usage recommendations

Use the clamp meter on single conductors only and keep hands clear of live parts. Verify that the measured current does not exceed the clamp range. When measuring high currents or working in industrial environments, follow applicable safety standards and use appropriate personal protective equipment. Store the meter in a dry, dust-free environment and replace batteries according to the manufacturer’s guidance to maintain reliable operation.