VOLTCRAFT VC-523 (ISO) Digital Clamp Meter, True RMS, CAT III 600 V, 4000 Counts, ISO Calibrated VC-9499270

When troubleshooting electrical systems, you need a tool that delivers accurate measurements without breaking the circuit. The VOLTCRAFT VC-523 (ISO) digital clamp meter solves this by allowing you to measure AC current up to 400 A simply by clamping around a conductor—no disconnection required. Its True RMS technology ensures precise readings even on non-sinusoidal waveforms, while the 4000-count display provides clear visibility in any lighting. This ISO-calibrated instrument is ready for professional use, offering confidence in every measurement.

Who is it for

Electricians, maintenance technicians, and HVAC professionals who require a reliable, calibrated clamp meter for daily diagnostics and verification tasks. It is also suitable for advanced hobbyists working on residential or light commercial electrical systems.

Main features

• ISO calibration certificate included, ensuring traceable accuracy
• True RMS measurement for accurate AC current and voltage on distorted waveforms
• Wide AC current range up to 400 A with 30 mm jaw opening for common conductors
• Measures AC/DC voltage, resistance, frequency, capacitance, diode, and continuity
• CAT III 600 V safety rating for safe use in building installations
• Data hold, auto power off, and low battery indicator for convenient operation
• Compact and lightweight design with digital LCD display

Specifications

• Display: 4000 counts digital LCD
• AC current: 0.01 A – 400 A
• AC voltage: 0.1 V – 600 V
• DC voltage: 0.1 V – 600 V
• Resistance: 0.1 Ω – 40 MΩ
• Frequency: 0.001 Hz – 10 kHz
• Capacitance: 0.001 µF – 100 µF
• Safety: CAT III 600 V
• Jaw opening: 30 mm
• Power supply: 1x 9V block battery
• Dimensions: 70 x 200 x 37 mm (W x H x D)
• Weight: 200 g

Tips

Always start with the highest range when measuring unknown currents to avoid overloading the meter. For best accuracy, center the conductor within the jaw and keep it away from other current-carrying wires. After use, turn off the meter to preserve battery life, and store it in a dry, protective case.