High-Voltage Wireless Phase Comparator

Product Introduction

MOEORW-W0715B Ground Resistance and Soil Resistivity Tester, also known as Precision Ground Resistance Tester, Four-Wire Ground Resistance Tester, Two/Three/Four-Wire Ground Resistance Tester, and Soil Resistivity Tester, consists of a main unit, data software, test leads, auxiliary grounding rods, communication cables, and other components. The main unit features a dedicated toolbox design, manufactured from polypropylene plastic with advanced composite fillers through single-shot injection molding. This construction delivers superior properties including low density, enhanced strength, rigidity, hardness, wear resistance, heat resistance, and insulation performance. The enclosure can withstand approximately 200kg of pressure, ensuring high precision, stability, and reliability in diverse environmental testing conditions. The main unit features an oversized LCD display with backlighting and bar graph indicators for clear, at-a-glance readability. It can store up to 300 sets of data, and through the data software, users can access, review, save, generate reports, and print historical data.

Product Parameter (specification)

Function	Ground resistance, soil resistivity testing; ground voltage, AC voltage testing
Power Supply	11.1V 2600mAh rechargeable lithium battery
Backlight	Adjustable white-screen backlight, suitable for dim environments
Measurement Methods	Precision 4-wire, 3-wire method measurement, simplified 2-wire ground resistance measurement
Measurement Methods
Ground Resistance	Rated current polarity reversal method, measurement current 20mA max
Soil Resistivity	Four-pole method (Werner method)
Ground Voltage	Average value rectification (between P(S)-ES terminals)
Measurement Range
Ground Resistance (R) via 2/3/4-wire methods	0.000Ω to 200.0kΩ
Soil Resistivity (ρ)	0.000 Ω·m to 9999 kΩ·m
Ground Voltage	AC 0.001 V to 600 V (50 Hz/60 Hz)
Maximum Resolution
Ground Resistance (R) via 2/3/4-wire method	0.001 Ω
Soil Resistivity (ρ)	0.01 Ω·m
Grounding voltage	0.001V
Accuracy	Two-three-four-wire method measurement Grounding resistance (R)
1. 0.000Ω～10.00kΩ	±2% of reading ±5 digits
2. 10.0kΩ～100.0kΩ	±3% of reading ±5 digits
3. 100.0kΩ to 200.0kΩ	±3.5% of reading ±5 digits
Note	Additional error at 5V interference voltage ≤ ±5% of reading ±5 digits
Soil resistivity (ρ)	Determined by R measurement accuracy
(ρ = 2πaR (a	1m to 100m); π = 3.14)
Grounding voltage	±2% of reading ±5 digits (50Hz/60Hz)
Test voltage waveform	Sine wave
Test frequency	412Hz, 825Hz, 1280Hz (auto-selection)
Short-circuit test current	AC 10mA max
Open-circuit test voltage	AC 90V max
Electrode Spacing Range	1m to 100m
Automatic Range Switching
Ground Resistance	0.000Ω to 200kΩ
Soil Resistivity	0.00Ω·m to 9999kΩ·m
LCD	6-digit LCD display with white backlight
LCD Size	128mm × 75mm
LCD Display Area	124mm × 67mm
Measurement Indication	LED flashes during measurement, LCD countdown, progress bar indicator
Dimensions	Instrument size;Approx. 320mm (L) × 275mm (W) × 145mm (H)
Outer Packaging Dimensions	Approx. 400mm (L) × 245mm (W) × 335mm (H)
Standard Test Leads	4 pieces;Red 15m, Black 15m, Yellow 10m, Green 10m
Simplified Test Leads	2 pieces;Red 1.6m, Black 1.6m
Auxiliary Grounding Rods	4 pieces;Approx. φ10mm × 200mm
Measurement Frequency
Ground Voltage	Approx. 2 times/second; Ground Resistance
Approx. 7 seconds/measurement; Soil Resistivity	Approx. 7 seconds/measurement
Measurement Capacity
Over 5000 measurements (Short-circuit test	1 measurement, pause 30 seconds before next measurement)
Line Voltage
Measures below AC 600V
Communication Interface	USB interface for data upload to computer and storage/printing
Communication Cable	1 USB cable, 1.5m long
Data Hold	"HOLD" symbol indicates data retention
Data Storage	300 sets; "HOLD" storage indicator; "FULL" displays when storage is full
Data Review	"READ" symbol indicates data review
Overflow Display	"OL" symbol indicates when measurement exceeds range
Interference Detection	Automatically identifies interference signals; "NOISE" symbol indicates when interference voltage exceeds 5V
Alarm Function	Emits "beep-beep-beep" alarm when measurement exceeds preset alarm value
Battery Voltage	Low battery voltage symbol displays when battery voltage is insufficient, prompting recharge
Auto Power Off	Automatically powers off after 15 minutes of inactivity
Operating Current	Standby;25mA max (backlight off); Backlight;25mA max (backlight only); Measurement;150mA max (backlight off)
Weight	Instrument;Approx. 2.66kg (including battery)
Total Weight	Approx. 6.88kg (including packaging)
Toolbox	Military-grade toolbox design, rated for 200kg load capacity
Operating Temp/Humidity	-10°C to 40°C; ≤80% RH
Storage Temp/Humidity	-20°C to 60°C; ≤70% RH
Overload Protection	Ground resistance measurement
C(H)-E, P(S)-ES ports	AC280V/3 seconds
Insulation Resistance	>20MΩ (500V between circuit and housing)
Withstand Voltage	AC3700V/rms (between circuit and housing)
Electromagnetic Characteristics	IEC61326 (EMC)
Compliance	Safety Standards IEC61010-1 (CAT III 300V, CAT IV 150V, Pollution Degree 2); IEC 61010-031; IEC 61557-1 (Grounding Resistance); IEC 61557-5 (Soil Resistivity); JJG 366-2004 (Grounding Resistance Meter)

Product feature and application

1. **Multi-Functional**:

Supports ground resistance, soil resistivity, ground voltage, and AC voltage measurements, suitable for power, construction, lightning protection, and other scenarios.

2. **Precision Measurement**:

Utilizes 4/3/2-wire methods for ground resistance and 4-pole method for soil resistivity. Incorporates FFT and AFC technology for automatic interference suppression, achieving a maximum resolution of 0.001Ω.

3. **User-Friendly Operation**:

Features an extra-large backlit LCD display with progress bar and countdown indicators; automatic range switching; auto-shutdown after 15 minutes of inactivity; supports data hold, storage (300 sets), review, and computer upload/printing.

4. **Durable and Safe**:

Toolbox withstands 200kg load and high insulation. Features overload protection, overvoltage alerts, and alarm functions, compliant with IEC61010 and multiple safety standards.

5. **Stable Battery Life**:

11.1V 2600mAh lithium battery delivers over 5000 measurements on a full charge. Requires charging only once every 3 months during long-term storage.

Prodection details

Power Industry: Ground resistance testing and soil resistivity measurement for power facilities such as power plants, substations, and transmission lines to ensure safe operation of power systems.
Telecommunications Sector: Grounding system testing for communication base stations, equipment rooms, and transmission lines to guarantee interference resistance and operational stability of communication equipment.
Meteorological Field: Ground resistance and soil resistivity testing for facilities like meteorological observation stations and radar stations to mitigate impacts from natural disasters such as lightning strikes.
Oilfield Industry: Grounding system performance testing for oilfield extraction equipment and pipelines to prevent safety risks from static electricity or lightning strikes.
Construction Industry: Lightning protection grounding resistance testing and soil resistivity measurement for buildings (especially high-rises and large venues) and construction sites, providing data for grounding system design.
Lightning Protection Engineering: Grounding resistance and soil resistivity testing during installation, acceptance, and maintenance of lightning protection facilities to ensure compliance with protection standards.
Industrial Electrical Equipment: Grounding system inspections for industrial equipment including factory production lines, heavy machinery, and electrical control cabinets to safeguard equipment operation and operator safety.
Other Scenarios: Grounding resistance, soil resistivity, and related voltage measurements at locations such as airports, railways, and chemical industrial parks to meet safety protection and compliance testing requirements across diverse sites.

Company Qualifications

FAQ

1)What safety requirements must be followed when connecting the USB cable of the MOEORW-W0715B Ground Resistance and Soil Resistivity Tester to a computer?

Answer: The USB port of this instrument is non-isolated from its internal circuitry. Core safety requirements are as follows:
1. Connecting to a computer while voltage is present is strictly prohibited, as it may burn out the instrument or cause electric shock.
2. Always disconnect the voltage test leads from the instrument before connecting the USB cable to retrieve data;
3. The online monitoring function described in the manual is not intended for voltage monitoring and must not be used for voltage monitoring scenarios.

2)What are the design features of the MOEORW-W0715B Earth Resistance and Soil Resistivity Tester's main unit toolbox, and what functions does it serve?

Answer: The main unit features a dedicated toolbox design, molded in one piece from polypropylene plastic with new composite fillers. Key design characteristics include low density coupled with superior strength, rigidity, hardness, wear resistance, heat resistance, and insulation properties. The case can withstand approximately 200kg of pressure. This design ensures high precision, stability, and reliability during testing in diverse environments while providing robust protection for the instrument, adapting to complex field testing scenarios.

3)What are the key differences in test lead connections and usage scenarios when performing ground voltage testing versus AC voltage testing with the MOEORW-W0715B Ground Resistance and Soil Resistivity Tester?

Answer: Key differences are as follows:
1. Test Lead Connection:
- Ground Voltage Test: Requires connecting one auxiliary grounding rod. Only the corresponding test lead must connect to the earth ground; commercial power lines (L/N) must not be connected.
- AC Voltage Test: No auxiliary grounding rod is needed. Only connect the test leads to the instrument's P(S) and ES terminals; do not connect to C(H) or E terminals.
2. Application Scenarios: Ground voltage testing measures the potential difference between the grounding electrode and the earth's zero potential point during electrical equipment ground faults. It cannot be used for commercial voltage testing. AC voltage testing measures standard commercial AC line voltages below 600V. These scenarios must be strictly distinguished to prevent instrument damage from cross-application

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