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 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.

• Technical data

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)

 

 

 

 

Weight and dimensions

 

Parameter	Value
Net weight (kg)	1.6
Package weight (kg)	5.1
Package width (cm)	18.5
Package height (cm)	32.1
Package length (cm)	46

 

 

 

Accessories included with the meter

Doble-wire test lead 3 m CAT III/1000V CAT IV/600V (12 A / 32 A) U1/I1

NO. CAT. WAPRZ003DZBBU1I1

1 pcs

Doble-wire test lead 3 m CAT III/1000V CAT IV/600V (12 A / 32 A) U2/I2

NO. CAT. WAPRZ003DZBBU2I2

1 pcs

AKU-03

NiMH rechargeable battery 4.8 V 3 Ah

NO. CAT. WAAKU03

1 pcs

2-pin Kelvin probe

NO. CAT. WASONKEL2OGB

2 pcs

L-1

Carrying case

NO. CAT. WAFUTL1

1 pcs

K-03

Crocodile clip, black, 1 kV, 32 A

NO. CAT. WAKROBL30K03

4 pcs

K-06

Kelvin clamp, 1 kV, 25 A

NO. CAT. WAKROKELK06

2 pcs

RS-232

RS-232 serial transmission cable

NO. CAT. WAPRZRS232

1 pcs

Hanging straps

NO. CAT. WAPOZSZE1

1 pcs