Sonel MMR-650

DESCRIPTION

The Sonel MMR-650 Low Resistance Meter is designed to measure very low resistances of both resistive and inductive types of objects, including amorphous core transformers. This product is engineered for use in power plants, railways and maintenance companies to measure welded and soldered connections, equipotential bondings, earthing conductors, contacts, bolted connections, windings of motors and power transformers and other resistive and inductive objects.

The MMR-650 can also be utilised on production lines (e.g. at the final production control stage). It’s an innovative combination of a high-performance measuring device with a modern user interface and an advanced data management system. Wireless data transmission, an enhanced system of 2D codes and the ability to print labels to identify test items all contribute to a new quality of work and allow the user to perform a wide range of measurements.

FEATURES

• Li-Ion battery power recharges in 3.5 hours
• It can be operated with mains power
• Over 700 10 Amp tests between charges
• Measurements from 0.1µΩ to 2,000Ω
• Class-leading 0.25% accuracy
• Built-in back EMF discharge and demagnetisation of windings
• Temperature compensation & heat run analysis with included temperature probe
• No switches! The MMR-650 is fully controlled from the full-colour touch screen, just like your smartphone or tablet
• Supplied with both Kelvin Clips and Kelvin Spike Probes

SPECIFICATIONS

Measurement

• Ranges: 1000µΩ, 2, 20, 200, 1000mΩ, 2, 20, 200, 2000Ω
• Resolution: 0.1µΩ to 0.1Ω
• Accuracy: ±0.25% reading +2 digits
• Measurement time – resistive: 3s
• Measurement time – inductive: 5s or greater
• Protection from external voltage: 600V AC for 10s
• Communication: USB, WiFi & optional LAN
• Memory: 990 measurements in 10 banks of 99

Power Supply

• Battery: 7.2V, 8.8Ah Li-Ion
• AC Supply/charger: 90-265V, 50Hz
• Battery charging time: 3.5 hours
• Number of 10A tests per charge: 700-800
• Auto Off: User-definable from 5 to 45 minutes or continuous

General

• Measurement Category: Cat 3, 600V to IEC 61010
• User interface: 800 x 400 Colour TFT graphical display
• Protection grade: IP67 lid closed, IP54 lid open, IP40 lid open and mains-powered
• Working temperature: -10 to +50°C
• Relative humidity: 40 – 60%

Applications

• Power plants — In power plants, the MMR-650 is indispensable for ensuring the efficient operation and safety of electrical systems. It precisely measures low resistances in transformers and conductors, aiding in effective energy distribution and the maintenance of system reliability.
• Railway systems — This meter is vital in maintaining safe and efficient operations in railway infrastructures by accurately assessing the resistance of rail bonds and electrical connections. This precise measurement is vital for the smooth functioning of railway electrical systems, ensuring safety and operational efficiency in the rail network.
• Industrial maintenance — The MMR-650 is crucial for routine checks and troubleshooting in industrial facilities because it helps evaluate the integrity of connections and earth bonds. This helps in preventing equipment failure, ensuring operational safety and maintaining continuous production.
• Quality control in manufacturing — In the manufacturing sector, especially in final-stage quality control, the MMR-650 verifies if products meet electrical standards. Its precise resistance measurements can confirm product quality, enhancing overall manufacturing excellence and ensuring the reliability of electrical components before they reach the market.
• Electrical system installations — The meter is essential for gauging the integrity of new electrical installations, including earthing systems and bonding connections. It can help a professional certify if these installations meet safety standards and function optimally.