Ready to work even in extreme conditions, the winding resistance and small resistance meter Sonel MMR-650 has been created to accurately measure small resistances of resistive and inductive objects. The instrument can be used to measure the resistance of both transformer windings – including amorphous-core transformers – and resistive objects. The MMR-650 meter is dedicated to use in power plants, maintenance companies and railway industry, among others.
Product features:
- measurement of winding resistance (inductive objects including amorphous core transformers)
- measurement of very low resistance
- transformer core demagnetization function
- automatic temperature compensation function (temperature probe)
- function of determining the temperature of a motor under load
- high immunity to disturbances
Accessories included:
- 1 pcs – Doble-wire test lead 3 m CAT III/1000V CAT IV/600V (12 A / 32 A) U1/I1
- 1 pcs – Doble-wire test lead 3 m CAT III/1000V CAT IV/600V (12 A / 32 A) U2/I2
- 2 pcs – 2-pin Kelvin probe
- 1 pcs – ST-3 Temperature probe
- 1 pcs – AKU-27 Li-ion battery 7.2 V
- 1 pcs – L-11 Carrying case
- 2 pcs – K-06 Kelvin clamp, 1 kV, 25 A
- 1 pcs – USB cable
Application:
The MMR-650 winding resistance and low resistance meter is designed to measure very low very low resistance of both windings – including amorphous core transformers – and resistive objects. This product is made to be used in power plants, railways and maintenance companies to measure resistance of:
- windings of power transformers and motors,
- breakers, contacts,
- earthing conductors, equipotential bondings,
- welded and soldered connections,
- bolted connections,
- and other resistive and inductive objects.
MMR-650 can be also utilized on production lines (eg. at the final production control stage).
Device capabilities:
- The MMR-650 winding resistance and low resistance meter provides an innovative combination of a high-performance measuring device with a modern user interface and advanced data management system. Wireless data transmission, enhanced system of 2D codes and ability to print labels to identify test items, all contribute to bringing new quality of work and allow the user to perform a wide range of measurements.
Easy readout:
- The MMR-650 winding resistance and low resistance meter is equipped with a readable colour touchscreen that, due to its 800 x 480 pixel resolution, provides both high comfort of interacting with the interface and high readability of the measurement results.
Durable and practical casing:
- In response to the customers needs the MMR-650 microohmmeter has been designed to operate in difficult environmental conditions. A unique casing with the IP67 ingress protection rating ensures that the device is both waterproof and dustproof.
Datasheet MMR-650 EN_US






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