MRU-30 Earth Resistance and Resistivity Meter
3 in stock
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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 measuring multiple earthing without underground connections.
- ground resistivity (Wenner method),
- continuity of equipotential bondings and protective
- conductors (meeting the requirements IEC 60364) with auto-zero function – with current 200mA.
Additionally:
- measurement of resistance of auxiliary electrodes RS and RH,
- measurement of interference voltage,
- measurement in the presence of interference voltage in the power network
- with frequency 50Hz, 60Hz,
- 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,
- data transmission to the computer (USB),
- indication of battery state.
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3 in stock
CompareThe Sonel MRU-30 uses most known methods of earth resistance measurements. Tests can be performed using the 3-pole, 4-pole, 3-pole with auxiliary clamp and also, additionally, the MRU-30 employs the two clamp method of measurement, without the use of auxiliary test rods which can’t be used in some situations. Complementary features of the MRU-30 are measurements of soil resistivity, continuity measurement of protective and equipotential conductors and, using clamps, leakage currents and interference voltages.
- Robust and weatherproof (IP65) – no ingress of dust, water protected by a nozzle against enclosure from any direction.
- Ergonomic casing – small and handy casing to make the measurements more convenient than before.
- Built-in rechargeable battery – saving time to replace flat batteries; can be recharged from Power Bank and Cigarette Lighter Socket!
- Clear on-screen notes – displayed on screen before and after the measurement to alert user of possible dangers and irregularities.
- Many measurement methods available in a small, portable casing
| Weight | 5 kg |
|---|---|
| Dimensions | 20 × 15 × 7 cm |
Measurement of interference voltage UN (RMS)
| Range | Resolution | Accuracy |
| 0…100 V | 1 V | ±(10% m.v. + 1 digit) |
Measurement of continuity of equipotential bondings and protective conductors (Rcont)
measurement range to IEC 61557-4:2007: 0,13 Ω…1999 Ω
| Range | Resolution | Accuracy |
| 0,00…9,99 Ω | 0,01 Ω | ±(2% m.v. + 3 digits) |
| 10,0…99,9 Ω | 0,1 Ω | |
| 100…1999 Ω | 1 Ω |
• measurement current: under short circuit >200mA
• frequency of measurement current: 125 Hz (for networks 50 Hz) and 150 Hz (for networks 60 Hz)
Measurement of earthing resistance (method 3- and 4-pole)
measurement range to IEC 61557-5:2007: 0,53 Ω…9999 Ω (dla 50 V)
| Range | Resolution | Accuracy |
| 0,00…19,99 Ω | 0,01 Ω | ±(3% m.v. + 3 digits) |
| 20,0…199,9 Ω | 0,1 Ω | |
| 200,0…1999 Ω | 1 Ω | ±5% m.v. |
| 2000…9999 Ω | 1 Ω | ±8% m.v. |
• measurement current: under short circuit >20 mA,
• voltage on open terminals: selectable 25 V AC or 50 V AC,
• frequency of measurement current: 125 Hz (for networks 50 Hz) or 150 Hz (for 60 Hz).
Measurement of multiple earthing esistance with using the clamp and auxiliary electrodes (3p + clamp)
| Range | Resolution | Accuracy |
| 0,00…19,99 Ω | 0,01 Ω | ±(3% m.v. + 3 digits) |
| 20,0…199,9 Ω | 0,1 Ω | |
| 200…1999 Ω | 1 Ω | ±5% m.v. |
| 2000…9999 Ω | 1 Ω | ±8% m.v. |
• voltage on open terminals: selectable 25 V AC or 50 V AC,
• measurement current: under short circuit >20 mA,
• frequency of measurement current: 125 Hz (for networks 50 Hz) and 150 Hz (for networks 60 Hz)
Measurement of resistance of auxiliary electrodes RH i RS
| Range | Resolution | Accuracy |
| 0…999 Ω | 1 Ω | ±(5% m.v.+ 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 double clamps
| Range | Resolution | Accuracy |
| 0,00…19,99 Ω | 0,01 Ω | ±(10% m.v. + 8 digits) |
| 20,0…99,9 Ω | 0,1 Ω | ±(20% m.v. + 3 digits) |
• frequency of measurement current: 125 Hz (for networks 50 Hz) and 150 Hz
(for networks 60 Hz)
Measurement of ground resistivity
Measurement method: Wenner, ρ=2πLRE
| Range | Resolution | Accuracy |
| 0,00…9,99 Ωm | 0,01 Ωm | depending on measurement accuracy RE with 4p method, but not less than ±1 digit |
| 10,0…99,9 Ωm | 0,1 Ωm | |
| 100…999 Ωm | 1 Ωm | |
| 1,00…9,99 kΩm | 0,01 kΩm | |
| 10,0…99,9 kΩm | 0,1 kΩm | |
| 100…999 kΩm | 1 kΩm |
L – distance between probes: 1…50 m.. or 1…150 ft
Electric security:
- type of insulation: double, according to EN 61010-1 i IEC 61557,
- measurement category: CAT III 300V wg EN 61010-1,
- protection class acc. to EN 60529: IP65,
Rated operational conditions:
- operation temperature: -10…+55°C,
- storage temperature: -20…+80°C,
- humidity: 20…90%,
Other technical data:
- LCD display: segment, backlit,
- dimensions: 200x150x74 mm.
Brand
SONEL
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Insulation Tester
MIC-2501,2500V Insulation Resistance Meter
Electrical safety:
- type of insulation: double, in acc. with EN 61010-1 und IEC 61557
- measurement category: IV 600 V (III 1000 V) in acc. to EN 61010-1
- case protection rating in acc. with EN 60529: IP65
Other technical specifications:
- power supply of the meter SONEL L-1 NiMH 9,6 V; DC 12 V 2,5 A
- weight of the meter: approx. 0,9 kg
- dimensions: 200 x 180 x 77 mm
- display: LCD segment display
- measurement results memory: 990 cells, 11880 records,
- transmission of measurement results: USB
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Clamp Meters
CLAMP METER AC DC CM 2056
Technical data
Basic function
Range
Accuracy
DCV
400mV/4V/40V/400V/1000V
±(0.5%+5)
ACV
400mV/4V/40V/400V/750V
±(1.0%+5)
DCA
400A/1000A
±(2.0%+5)
ACA
400A/1000A
±(2.0%+5)
Resistance
400Ω/4kΩ/40kΩ/400kΩ/4MΩ/40MΩ
±(0.8%+3)
Capacitance
4nF/40nF/400nF/4uF/40uF/200uF
±(3.5%+8)
Frequency
100Hz/1kHz/10kHz/100kHz/1MHz/10MHz
±(0.5%+4)
Temperature
(-40~ 1000) ℃ / (-40 ~1832) ℉
±(1.0%+5)
Special function
CM-2056
NCV test
√
True RMS test
√
Diode test
√
Continuity test
Less than 50Ω±10Ω
Low battery indicator
Approx. less than 2.4 V
Data hold
√
Auto power off
About 15 minutes
Function protection
√
Clamp light
√
Backlight display
√
Input impedance
10MΩ
Sampling rate
3 times/s
AC frequency response
Current 50-60Hz/ voltage 50-400Hz
Operation method
Auto or manual range
Max display
4000
Clamp opens
52mm
Battery
3V (2*AAA battery)
General Characteristic
Meter color
Orange and Black
Meter weight
About 280g (including battery)
Meter size
270×123×50mm
Standard accessory
Test leads, battery, manual, TP01 temperature probe
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Insulation Tester
DIGITAL INSULATION / CONTINUITY TESTER MODEL 3007A
• Bargraph to display insulation resistance.
• Displays the value of external AC voltage along with flashing symbol.
• Auto null function to automatically subtract the test lead resistance before displaying the real continuity resistance value.
• Trac-Lok mode to conserve battery life on insulation and continuity tests.
• Live circuit warning beeper.
• Releasing the test button automatically discharges the charges stored in the circuit under test.
• Backlight function to view the test results in dimly lit areas.
• 200mA continuity measuring current to IEC 61557.
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