- Description
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 electric 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.
Product features
MMR-620 microohmmeter enables accurate measurements of both connections resistance (welded, soldered, bolted) and winding resistance of electrical motors.
- 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 (accelerated mode, with slightly worse accuracy, available); 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 start 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.
- Measurements of objects resistive in nature:
- Technical specification
Resistance measurement
Range Resolution Test current Accuracy 0...999 μΩ 1 μΩ 10 A ±(0.25% m.v. + 2 digits) 1.000...1.999 mΩ 0.001 mΩ 10 A ±(0.25% m.v. + 2 digits) 2.00...19.99 mΩ 0.01 mΩ 10 A ±(0.25% m.v. + 2 digits) 20.0...199.9 mΩ 0.1 mΩ 1 A ±(0.25% m.v. + 2 digits) 200...999 mΩ 1 mΩ 0.1 A ±(0.25% m.v. + 2 digits) 1.000...1.999 Ω 0.001 Ω 0.1 A ±(0.25% m.v. + 2 digits) 2.00...19.99 Ω 0.01 Ω 10 mA ±(0.25% m.v. + 2 digits) 20.0...199.9 Ω 0.1 Ω 1 mA ±(0.25% m.v. + 2 digits) 200...1999 Ω 1 Ω 0.1 mA ±(0.25% m.v. + 2 digits) m.v. - measured value
- Standard accessories
- Optional accessories
- Files
