Low resistance meter with Calibration Certificate MMR-650 WMPLMMR650

Low Resistance Meter – Precision and Versatility in One Device

The Sonel MMR-650 resistance meter is an advanced measuring instrument dedicated to accurately determining the resistance of transformer windings and other resistive and inductive elements. Designed for professionals working in power plants, maintenance companies, and railways, it offers reliability and precision even in harsh conditions. Thanks to certified calibration, the measurement results are always reliable and compliant with applicable standards.

Application and functionality

MMR-650 is a versatile tool that will work in many applications:

• Measurement of transformer winding resistance (including transformers with amorphous core).
• Measurement of very low resistance of electrical protections, contacts, grounding and equalization connections.
• Quality control of welded, soldered and screwed joints.
• Verification of the condition of connections on production lines.
• Transformer core demagnetization – a function that facilitates precise measurements.
• Automatic temperature compensation – ensures measurement accuracy regardless of ambient temperature (requires a temperature probe).
• Determination of the temperature of a motor operating under load – useful in diagnosing electric motors.

The device is characterized by high resistance to interference, which guarantees stable and reliable results even in industrial environments. Wireless data exchange and the ability to print labels identifying tested objects significantly streamline the measurement documentation process.

Construction and ease of use

The MMR-650 meter has been designed with user comfort in mind. It is equipped with a clear, color touchscreen with a high resolution (800 x 480 pixels), which ensures easy operation and clear reading of results. The durable housing with an IP67 protection rating guarantees waterproof and dustproof properties, allowing work in difficult environmental conditions. The set includes essential accessories such as Kelvin probes, crocodile clips and measuring cables, as well as a case for safe storage and transport of the device. The calibration certificate confirms the accuracy of measurements from the very beginning of use.