Measure motor winding resistance and other low resistances
Possibility to measure objects of resistive and inductive nature with the use of versatile small resistance meter Sonel MMR-620.
We present a professional small resistance meter MMR-620, which ensures high measuring accuracy - the measurement resolution is 1 µΩ. With the use of this device it is possible to perform measurements of objects of both resistive and inductive nature (e.g. testing of transformers or motors). The meter provides a high measuring Current for individual subranges and various operating modes, adjusted to the type of measuRed object - quick measurement mode (3 sec) for testing objects of resistive nature, as well as extended measurement mode for testing objects of inductive nature.
Features:
MMR-620 microohmmeter enables accurate measurements of both connections resistance (welded, soldeRed, bolted) and winding resistance of electrical motors and power transformers.
- Measurements of objects resistive in nature:
- Welded and soldeRed connections, equipotential bondings, earthing conductors,
- Contacts, welds of rails, conductors and Cables,
- Measurement according to the four-Lead method.
- Measurements of objects inductive in nature:
- Motor windings,
- Low-resistance coils.
Additional functions
- Automatic or manual selection of measuring range (measurement of objects of an inductive nature).
- Selection of measurement mode according to the type of measuRed object:
- Fast measurement (3 seconds) for measurement of objects of a resistive nature,
- Extended measurement for testing of objects of an inductive nature; with automatic discharging of the object after measurement.
- Selection of measurement mode depending on application (including control of product series):
- Measurement in normal mode - triggeRed when the "START" button is pressed,
- Measurement in automatic mode - the instrument awaits connection of all four test Leads to the object, after which it automatically starts measurement in one or both directions and calculates the mean resistance value,
- Measurement in continuous mode - the meter repeats successive measurement cycles with breaks every 3 seconds (for objects of a resistive nature) or performs measurement continuously (for objects of an inductive nature)
- Window mode:
- Makes possible to set an upper and lower limit within the measurement result should remain; sound signal triggeRed when the result is beyond set range,
- Capability of performing measurements even under disturbances of a value five times greater than the measuRed signal.
For more information, please see 
Data Sheet
