The WDM9502 RCD/Loop Tester is a high-precision electrical diagnostic tool designed for professional electricians and technicians who demand reliable, real-time circuit testing. Built for accuracy and safety, this True RMS tester provides rapid and precise measurement of line voltage, neutral-ground voltage, peak line voltage, and line frequency, ensuring optimal circuit performance and fault detection.

With a line voltage range of AC 85–265V and neutral-ground voltage up to 10V, it enables comprehensive testing of residential, commercial, and industrial systems. The RCD trip time (1ms–6.5s) and trip current (30mA) functions ensure fast response during safety verification, while the data hold, LCD display, and backlight features provide convenience in any lighting condition.

Compact yet powerful, the WDM9502 includes 6pcs LR03 AAA batteries for immediate use, making it a must-have for anyone performing loop impedance and RCD safety testing.

KEY FEATURES:

• True RMS Accuracy: Ensures precise measurement of AC voltage and current across varying loads.

• Line Voltage Range: AC 85~265V for versatile testing.

• Neutral-Ground Voltage: Measures up to AC 10V for detailed fault analysis.

• Peak Line Voltage: Detects AC 121~374V accurately.

• Line Frequency Measurement: 45~65Hz for standard and variable power systems.

• RCD Testing Function: Measures trip time (1ms–6.5s) and trip current (30mA) for safety verification.

• User-Friendly Design: Features data hold, LCD display, and backlight for better visibility.

• Compact & Portable: Size 194×78×37mm, weight 254g.

• Battery Powered: Operates on 6pcs LR03 AAA batteries (included).

• Professional-Grade Build: Ideal for electricians, engineers, and inspection specialists.