MRU200 is the only meter in the market which uses all measurement methods.
 earth resistance measurment with 2pole, 3pole,4pole method,
 impulse earth impedance measurement, three kinds of measuring impulse 4/10μs, 8/20μs, 10/350μs,
 earth resistance measurement without disconnecting measured earths (using clamp),
 two clamps earth resistance measurement without auxiliary test probs,
 earth resistivity measurement,
 continuity measurement,
 leakage current measurement.

Multiple measurement possibilities:
 earth resistance using auxiliary electrodes,
 earth resistance using auxiliary electrodes and current clamp for measurements of multiple earth ground points
 earth resistance using double current clamps for measurement of earth ground when it is impossible to use electrodes in the ground
 impulse earth impedance for lightning without disconnecting measured earthing
 ground resistivity (Wenner method),
 current using current clamp (e.g. leakage) and flexible current probe (Rogowsky coil),
 measurement of continuity of equipotential bondings and protective conductors (meeting the requirements of IEC 60364  6  61:2000 section 6.12.2) with autozero function – with current 200 mA.
Additionally:
 measurement of resistance of auxiliary electrodes RS and RH,
 measurement of interference voltage,
 measurement of interference frequency,
 measurement in the presence of interference voltage in the power network
with frequency 16 2/3 Hz, 50 Hz, 60 Hz and 400 Hz (with automatic selection of proper frequency of measuring signal or with manual selection),  selection of maximum measuring voltage (25 V and 50 V)
 introducing the distance between the electrodes for the resistivity in metres (m) and feet (ft),
 memory of 990 measurements (10 banks of 99 cells each),
 calibration of clamp used,
 real time clock (RTC),
 data transmission to the computer (USB),
 indication of battery state.
Electric security:
 type of insulation: double, according to EN 61010  1 and IEC 61557
 measurement category: CAT IV 300 V acc. to EN 61010  1
 protection class acc. to EN 60529: IP54
Rated operational conditions:
 operation temperature: 14F to 122F / 10 to +50°C
 storage temperature: 4F to 158F / 20 to +70°C
 humidity: 20 to 80%
Other technical data:
 LCD display: graphic, backlighted
 interface: USB
 number of measurements carried out of set of batteries: > 1200
 warranty: 24 months
Measurement of interference voltage
Range  Resolution  Accuracy 
0 to 100 V  1 V  ±(2% m.v. + 3 digits) 
Measurement of interference frequency
Range  Resolution  Accuracy 
15 to 450 Hz  1 Hz  ±(1% m.v. + 2 digits) 
Measurement of earthing resistance (method 3 and 4pole)
measurement range to IEC61557  5: 0.100 Ω to 19.9 kΩ
Range  Resolution  Accuracy 
0.000 to 3.999 Ω  0.001 Ω  ±(2% m.v. + 4 digits) 
4.00 to 39.99 Ω  0.01 Ω  ±(2% m.v. + 2 digits) 
40.0 to 399.9 Ω  0.1 Ω  
400 to 3,999 Ω  0.001 kΩ  
4.00k to 19.99 kΩ  0.01 kΩ  ±(5% m.v. + 2 digits) 
Measurement of continuity of equipotential bondings and protective conductors (Rcont)
measurement range to IEC61557  4: 0.045 Ω to 19.99 kΩ
Range  Resolution  Accuracy 
0.000 to 3.999 Ω  0.001 Ω  ±(2% m.v. + 4 digits) 
4.00 to 39.99 Ω  0.01 Ω  ±(2% m.v. + 2 digits) 
40.0 to 399.9 Ω 
0.1 Ω 

400 to 3,999 Ω  0.001 kΩ  
4.00k to 19.99 kΩ  0.01 kΩ  ±(5% m.v. + 2 digits) 
Measurement of resistance of auxiliary electrodes RH and RS
Range  Range  Accuracy 
0 to 999 Ω  1 Ω  ±(5% (RS+RE+RH) + 8 digits) 
1.00k to 9.99 kΩ  0.01 kΩ  
10.0k to 19.9 kΩ  0.1 kΩ 
Measurement of multiple earthing resistance with using the clamp and auxiliary
electrodes (3p + clamp)
Range  Resolution  Accuracy 
0.000 to 3.999 Ω*  0.01 Ω  ±(8% m.v. + 4 digits) 
10.0 to 99.9 Ω  0.01 Ω  ±(8% m.v. + 3 digits) 
100 to 999 Ω  0.1 Ω  
1.00k to 1.99 kΩ  1 Ω 
*  in range 0.000 to 0.045 Ω the accuracy is not specified.
Measurement of multiple earthing resistance with using double clamps
Range  Resolution  Accuracy 
0.00 to 19.99 Ω  0.1 Ω  ±(10% m.v. + 3 digits) 
20.0 to 149.9 Ω  0.1 Ω  ±(20% m.v. + 3 digits) 
Measurement of ground resistivity Measurement method: Wennera, ρ=2πLRE
Range  Resolution  Accuracy 
0.0 to 199.9 Ωm  0.1 Ωm  depending on measurement
accuracy RE with 4p method, but not less than ±1 digit 
200 to 1999 Ωm  1 Ωm  
2.00k to 19.99 kΩm  0.01 kΩm  
20.0k to 99.9 kΩm  0.1 kΩm  
100k to 999 kΩm  1 kΩm 
L – distance between probes: 1 to 150 ft / 1 to 50 m
Measurement of AC current (leakage)
Range  Resolution  Accuracy 
0.1 to 99.9 mA 1  0.1 mA  ±(8% m.v. + 5 digits) 
100 to 999 mA 1  1 mA  ±(8% m.v. + 3 digits) 
1.00 to 4.99 A 1,2  0.01 A  ±(5% m.v. + 5 digits)1
unspecified 2 
5.00 to 9.99 A 1,2  0.01 A  ±(5% m.v. + 5 digits) 
10.0 to 99.9 A 1,2  0.1 A  
100 to 300 A 1,2  1 A 
1 – receiving clamp (diameter 2" / 52 mm) – C3
2 – flexible clamp (Rogowsky coil): F1 diameter 14" / 360 mm; F2: diameter 9" / 235 mm; F3: diameter 4.7" / 120 mm
Measurement of dynamic earthing resistance (RD) with impulse wave method (4p )
Range  Resolution  Accuracy 
0.0 to 99.9 Ω  0.1 Ω  ±(2,5% m.v. + 3 digits) 
100 to 199 Ω  1 Ω 
choice impulse edges: 4/10μs, 8/20μs, 10/350μs
„m.v.” measured value