Máy đo điện trở đất và điện trở suất Sonel MRU-200-GPS
Hãng sản xuất: Sonel
Xuất xứ: Balan-EU
Model: MRU-200-GPS
Thông số kỹ thuật: Máy đo điện trở đất và điện trở suất Sonel MRU-200-GPS
Earth Resistance and Resistivity Meter
Description
MRU-200-GPS is the only meter in the market which uses all measurement methods.
- earth resistance measurment with 2-pole, 3-pole,4-pole method,
- impulse earth impedance measurement, two kinds of measuring impulse 4/10μs, 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.
- built in GPS,
- GPS coordinates of the measurement are stored in meter memory.
Specifications
It allows to take the measurements of:
- earth resistance using auxiliary electrodes,
- earth resistance using auxiliary electrodes and clamp (for measurements of multiple earthing)
- earth resistance using double clamps (for measurement of earthing when it is impossible to use auxiliary electrodes),
- impulse earth impedance (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 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: -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: 24 months
Measurement of interference voltage
| Range | Resolution | Accuracy |
| 0...100 V | 1 V | ±(2% m.v. + 3 digits) |
Measurement of interference frequency
| Range | Resolution | Accuracy |
| 15...450 Hz | 1 Hz | ±(1% m.v. + 2 digits) |
Measurement of earthing resistance (method 3- and 4-pole)
measurement range to IEC61557 - 5: 0,100 Ω...19,9 kΩ
| Range | Resolution | Accuracy |
| 0,000...3,999 Ω | 0,001 Ω | ±(2% m.v. + 4 digits) |
| 4,00...39,99 Ω | 0,01 Ω | ±(2% m.v. + 2 digits) |
| 40,0...399,9 Ω | 0,1 Ω | |
| 400...3999 Ω | 0,001 kΩ | |
| 4,00k...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...19,99 kΩ
| Range | Resolution | Accuracy |
| 0,000...3,999 Ω | 0,001 Ω | ±(2% m.v. + 4 digits) |
| 4,00...39,99 Ω | 0,01 Ω | ±(2% m.v. + 2 digits) |
| 40,0...399,9 Ω |
0,1 Ω |
|
| 400...3999 Ω | 0,001 kΩ | |
| 4,00k...19,99 kΩ | 0,01 kΩ | ±(5% m.v. + 2 digits) |
Measurement of resistance of auxiliary electrodes RH and RS
| Range | Range | Accuracy |
| 0...999 Ω | 1 Ω | ±(5% (RS+RE+RH) + 8 digits) |
| 1,00k...9,99 kΩ | 0,01 kΩ | |
| 10,0k...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...3,999 Ω* | 0,01 Ω | ±(8% m.v. + 4 digits) |
| 10,0...99,9 Ω | 0,01 Ω | ±(8% m.v. + 3 digits) |
| 100...999 Ω | 0,1 Ω | |
| 1,00k...1,99 kΩ | 1 Ω |
* - in range 0,000…0,045 Ω the accuracy is not specified.
Measurement of multiple earthing resistance with using double clamps
| Range | Resolution | Accuracy |
| 0,00...19,99 Ω | 0,1 Ω | ±(10% m.v. + 3 digits) |
| 20,0...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...199,9 Ωm | 0,1 Ωm | depending on measurement accuracy RE with 4p method, but not less than ±1 digit |
| 200...1999 Ωm | 1 Ωm | |
| 2,00k...19,99 kΩm | 0,01 kΩm | |
| 20,0k...99,9 kΩm | 0,1 kΩm | |
| 100k...999 kΩm | 1 kΩm |
L – distance between probes: 1...50 m
Measurement of AC current (leakage)
| Range | Resolution | Accuracy |
| 0,1...99,9 mA 1 | 0,1 mA | ±(8% m.v. + 5 digits) |
| 100...999 mA 1 | 1 mA | ±(8% m.v. + 3 digits) |
| 1,00...4,99 A 1,2 | 0,01 A | ±(5% m.v. + 5 digits)1 unspecified 2 |
| 5,00...9,99 A 1,2 | 0,01 A | ±(5% m.v. + 5 digits) |
| 10,0...99,9 A 1,2 | 0,1 A | |
| 100...300 A 1,2 | 1 A |
1 – receiving clamp (diameter 52 mm) – 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...99,9 Ω | 0,1 Ω | ±(2,5% m.v. + 3 digits) |
| 100...199 Ω | 1 Ω |
choice impulse edges: 4/10μs, 8/20μs, 10/350μs
„m.v.”- measured value
