HT Instruments M73 RCDs Tester, Global Earth Resistance Meter & TRMS DMM

Key Features

• RCD trip-out time measurement for standard AC RCDs.
• Selectable trip-out current: 30, 30x5, 100, 300 mA.
• High-resolution global earth resistance measurement (0.1 mΩ).
• Earth resistance testing without tripping RCDs.
• True RMS measurement for AC and DC voltage.
• True RMS AC current and leakage current measurement (with optional clamp).
• Automatic detection of AC/DC signals.
• Resistance and continuity testing with audible buzzer.
• Frequency measurement via test leads or optional clamp.
• Phase sequence and phase coincidence indication using 1- or 2-wire methods.
• Peak measurement (1ms) for inrush current analysis.
• Large, easy-to-read LCD display.
• Durable, ergonomic design with protective rubber holster.
• Compliant with VDE and IEC standards.

The HT Instruments M73 is a versatile, multi-function tester from the new MULTITEST family, engineered for both civil and industrial electrical diagnostics. It combines RCD trip time testing, global earth resistance measurement, and a full-featured TRMS digital multimeter (DMM) into a compact, rugged device. The M73 complies with VDE and IEC standards, making it ideal for evaluating AC RCDs and ensuring the safety and integrity of electrical installations.

In addition to high-resolution global earth resistance testing (without tripping RCDs), it features TRMS AC/DC voltage and current measurements, leakage current detection (with optional clamp), and comprehensive phase sequence and phase coincidence testing using 1- or 2-wire methods. Designed for usability and durability, the M73 includes a large LCD display, an ergonomic casing, intuitive function selector, and robust protective holster.

In the Box

• C2075: 2-wire cable with Schuko plug.
• KIT0075: Set of 2 cables with leads and 2 alligator clips.
• BORSA75: Carrying bag.
• ISO9000 Calibration Certificate.
• User Manual on CD-ROM.
• Quick Reference Guide.