- Hãng sản xuất: Sonel
- Model: MRU-200
- Xuất xứ: Ba Lan
MRU-200 is the only meter in the market which uses all measurement methods.
Possible measurements:
- earth resistance measurment with 2-pole, 3-pole,4-pole method,
- impulse earth resistance measurement, two kinds of measuring impulse 4/10s, 10/350s,
- earth resistance measurement without disconnecting measured earths (using clamp),
- two clamps earth resistance measurement without auxiliary test probs,
- earth resistirity measurement,
- continuity measurement,
- leakage current measurement,
It allows to take the measurements of:
earthing resistance using auxiliary electrodes,
earthing resistance using auxiliary electrodes and clamp (for measurements of multiple earthing)
earthing resistance using double clamps (for measurement of earthing when it is impossible to use auxiliary electrodes),
impulse earth resistance (without disconnecting measured earthing),
ground resistivity (Wenner method),
current using the clamp (e.g. leakage) and flexible clamp (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 auto-zero function – with current 200mA.
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, 50Hz, 60Hz and 400Hz (with automatic selection of proper frequency of measuring signal or with manual selection),
selection of maximum measuring voltage (25V and 50V)
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 300V acc. to EN 61010-1
- protection class acc. to EN 60529: IP54
Rated operational conditions:
- operation temperature: -10...+50°C
- storage temperature: -20...+70°C
- humidity: 20...80%
Other technical data:
- LCD display: graphic, backlighted
- interface: USB
- number of measurements carried out of set of batteries: > 1200
- warranty: 36 months
Measurement of interference voltage
|
Range
|
Resolution
|
Accuracy
|
|
0...100V
|
1V
|
±(2% m.v. + 3 digits)
|
Measurement of interference frequency
|
Range
|
Resolution
|
Accuracy
|
|
15...450Hz
|
1Hz
|
±(1% m.v. + 2 digits)
|
Measurement of earthing resistance (method 3- and 4-pole)
measurement range to IEC61557-5: 0,100Ω...19,9kΩ
|
Range
|
Resolution
|
Accuracy
|
|
0,000...3,999Ω
|
0,001Ω
|
±(2% m.v. + 4 digits)
|
|
4,00...39,99Ω
|
0,01Ω
|
±(2% m.v. + 2 digits)
|
|
40,0...399,9Ω
|
0,1Ω
|
|
400...3999Ω
|
0,001kΩ
|
|
4,00k...19,99kΩ
|
0,01kΩ
|
±(5% m.v. + 2 digits)
|
Measurement of continuity of equipotential bondings and protective conductors (Rcont)
measurement range to IEC61557-4: 0,045Ω...19,99kΩ
|
Range
|
Resolution
|
Accuracy
|
|
0,000...3,999Ω
|
0,001Ω
|
±(2% m.v. + 4 digits)
|
|
4,00...39,99Ω
|
0,01Ω
|
±(2% m.v. + 2 digits)
|
|
40,0...399,9Ω
|
0,1Ω
|
|
400...3999Ω
|
0,001kΩ
|
|
4,00k...19,99kΩ
|
0,01kΩ
|
±(5% m.v. + 2 digits)
|
Measurement of resistance of auxiliary electrodes RH and RS
|
Range
|
Range
|
Accuracy
|
|
0...999Ω
|
1Ω
|
±(5% (RS+RE+RH) + 8 digits)
|
|
1,00k...9,99kΩ
|
0,01kΩ
|
|
10,0k...19,9kΩ
|
0,1kΩ
|
Measurement of multiple earthing resistance with using the clamp and auxiliary
electrodes (3p + clamp) measurement range to IEC61557-5: 0,120Ω...1,99kΩ
|
Range
|
Resolution
|
Accuracy
|
|
0,000...3,999Ω*
|
0,01Ω
|
±(8% m.v. + 4 digits)
|
|
10,0...99,9Ω
|
0,01Ω
|
±(8% m.v. + 3 digits)
|
|
100...999Ω
|
0,1Ω
|
|
1,00k...1,99kΩ
|
1Ω
|
*- in range 0,000…0,045Ω the accuracy is not specified.
Measurement of multiple earthing resistance with using double clamps
|
Range
|
Resolution
|
Accuracy
|
|
0,00...19,99Ω
|
0,1Ω
|
±(10% m.v. + 3 digits)
|
|
20,0...149,9Ω
|
0,1Ω
|
±(20% m.v. + 3 digits)
|
Measurement of ground resistivity Measurement method: Wennera, ρ=2πLRE
|
Range
|
Resolution
|
Accuracy
|
|
0,0...199,9Ωm
|
0,1Ωm
|
depending on measurement
accuracy RE with 4p method,
but not less than ±1 digit
|
|
200...1999Ωm
|
1Ωm
|
|
2,00k...19,99kΩm
|
0,01kΩm
|
|
20,0k...99,9kΩm
|
0,1kΩm
|
|
100k...999kΩm
|
1kΩm
|
L – distance between probes: 1...50m
Measurement of AC current (leakage)
|
Range
|
Resolution
|
Accuracy
|
|
0,1...99,9mA 1
|
0,1mA
|
±(8% m.v. + 5 digits)
|
|
100...999mA 1
|
1mA
|
±(8% m.v. + 3 digits)
|
|
1,00...4,99A 1,2
|
0,01A
|
±(5% m.v. + 5 digits)1
unspecified 2
|
|
5,00...9,99A 1,2
|
0,01A
|
±(5% m.v. + 5 digits)
|
|
10,0...99,9A 1,2
|
0,1A
|
|
100...300A 1,2
|
1A
|
1 – receiving clamp (diameter 52mm) – C-3
2 – flexible clamp (Rogowsky coil) with diameter 400 mm – F-1
Measurement of dynamic earthing resistance (RD) with impulse wave method (4p )
|
Range
|
Resolution
|
Accuracy
|
|
0,0...99,9Ω
|
0,1Ω
|
±(2,5% m.v. + 3 digits)
|
|
100...199Ω
|
1Ω
|
