Megger MPU690 Proving Unit

Megger MPU690 Proving Unit

The Megger MPU690 Proving Unit is a reliable portable voltage source designed to check the accuracy of two-pole voltage testers. It generates stepped voltages in a controlled way, ensuring your tester works safely before you begin measurements. Each test cycle starts at 690 volts and then reduces step by step, giving full confirmation of tester performance.

Practical Safety Features

With automatic power-on, the Megger MPU690 activates as soon as probes are inserted, removing the need for manual switches. The 50 Hz output voltage simulates mains supply conditions, making it ideal for testing indicators that rely on lamps. LED displays confirm each voltage step, as well as the battery and power status, so users can work with clear visual feedback.

Durable and Convenient Design

The Megger MPU690 features a rugged case built for tough conditions and a magnetic base that allows hands-free placement during testing. Despite its high output, the device is efficient, offering extended battery life to support field use. Its compact and portable build makes it a practical tool for regular testing requirements.

This unit provides a trusted alternative to live voltage sources, helping ensure safe and accurate tester performance. The Megger MPU690 is intended for use with voltage testers but is not suitable for multimeters. With its mix of strength, safety, and reliability, it is an essential accessory for professionals who require precise proving checks.

Key Features

• Five stepped voltage outputs ranging from 50 to 690 volts
• Automatic operation triggered by probe insertion
• Clear LED indication for each voltage step
• Power and battery status LEDs for user assurance
• Simulated AC mains supply at 50 Hz output
• Rugged construction for demanding environments
• Extended battery life for longer field use
• Compact portable design for ease of handling
• Magnetic base for hands-free operation
• High output capacity suitable for lamp-based testers

Technical Specifications

What’s Included

• Megger MPU690 Proving Unit
• Instruction manual