Product Introduction
The MOEORW-WRD41 Ground Resistance & Soil Resistivity Tester is meticulously designed and manufactured for on-site measurement of ground resistance, soil resistivity, and ground voltage. It employs digital and microprocessor technology, utilizing precise 4-wire, 3-wire, and simplified 2-wire methods to measure ground resistance. It incorporates FFT (Fast Fourier Transform) and AFC (Automatic Frequency Control) technologies to automatically identify interference and select the appropriate measurement frequency, minimizing its impact and providing more accurate ground resistance values. It possesses unique anti-interference capabilities and environmental adaptability, exhibiting excellent repeatability and consistency, ensuring high accuracy, stability, and reliability for long-term measurements. It is widely used in power, telecommunications, meteorology, construction, lightning protection, and industrial electrical equipment for measuring ground resistance, soil resistivity, and ground voltage.
The MOEORW -WRD41 grounding resistance and soil resistivity tester consists of a main unit, data upload software , test leads, auxiliary grounding rods, and communication cables. The main unit features a large LCD display with white backlight and bar graph indicators for clear reading. It can store 300 sets of data simultaneously, and the data upload software enables historical querying and real-time online monitoring, dynamic display, alarm indication, and functions for reading, viewing, saving, generating reports, and printing historical data.
MOEORW-WRD41 Grounding Resistance/Soil Resistivity Tester (Also known as: Precision Grounding Resistance Tester, Four-Wire Grounding Resistance Tester, Two-Three-Four-Wire Grounding Resistance Tester, Soil Resistivity Tester, etc.)
Product Parameter (specification)
1. Baseline conditions and operating conditions
|
Impact |
Baseline conditions |
Working conditions |
Remark |
|
Ambient temperature |
23℃±1℃ |
-10℃～40℃ |
---- |
|
Ambient humidity |
40%～60% |
<80% |
---- |
|
Instrument operating voltage |
9V±0.1V |
9V±1.5V |
---- |
|
Auxiliary grounding resistance value |
<100Ω |
<30kΩ |
rC, rP |
|
Interference voltage |
none |
<20V |
---- |
|
Interference current |
none |
<2A |
---- |
|
Electrode spacing during R measurement |
a＞5d |
a＞5d |
---- |
|
Electrode spacing when measuring ρ |
a＞20h |
a＞20h |
---- |
2. General Specifications
|
Function |
Measurement of grounding resistance and soil resistivity for second, third, and fourth-line wires; measurement of grounding voltage. |
|
Power supply |
DC 9V ( size 2 alkaline dry cell battery) LR 14 1.5V) |
|
range |
Grounding resistance: 0.00Ω～30.00kΩ |
|
Soil resistivity: 0.00Ωm ~ 9000kΩm |
|
|
Grounding voltage: 0V～600V |
|
|
Measurement method |
Precision 4-wire, 3-wire method for measuring grounding resistance, and simplified 2-wire method for measuring grounding resistance. |
|
Measurement methods |
Grounding resistance: Rated current polarity changing method, measuring current 20mA Max Soil resistivity: Four-electrode method (Winner method) Voltage to ground: Average value rectified (between P(S) and ES interfaces) |
|
Test frequency |
128Hz/111Hz/105Hz/94Hz (AFC) |
|
Test current |
>20mA (sine wave) |
|
Open circuit test voltage |
AC 40V max |
|
Test voltage waveform |
sine wave |
|
Electrode spacing range |
The setting can be from 1m to 100m. |
|
Shift |
Grounding resistance: 0.00Ω～30.00kΩ Fully automatic range shifting |
|
Soil resistivity: 0.00Ωm～9000kΩm Fully automatic gear shifting |
|
|
Backlight |
Controllable white screen backlight, suitable for use in dimly lit environments. |
|
Display mode |
4-digit extra-large LCD display with white screen backlight |
|
Measurement indication |
During measurement, the LED flashes, the LCD counts down, and the progress bar graph indicates the progress. |
|
LCD size |
128mm × 75mm; Display area: 124mm × 67mm |
|
Instrument Dimensions |
212mm×175mm × 85mm |
|
Standard test line |
4 strips: one 20m red strip, one 20m black strip, one 10m yellow strip, and one 10m green strip. |
|
Simple test line |
Two strips: one red 1.6m strip and one black 1.6m strip. |
|
Auxiliary grounding rod |
4 pieces: φ 9 mm × 230 mm |
|
Measurement time |
Voltage to ground: approximately 3 times/second |
|
Grounding resistance, soil resistivity: approximately 1.5 seconds/time |
|
|
Number of measurements |
More than 5000 short-circuit tests (test once, pause for 30 seconds, then test again). |
|
Line voltage |
Measurement below AC 600V |
|
Communication interface |
It features a USB interface, software monitoring, and data storage that can be uploaded to a computer, saved, and printed. |
|
Communication line |
One USB communication cable, 1.5m long. |
|
Data storage |
300 groups, displaying the "FULL" symbol indicates that the storage is full. |
|
Data preservation |
The "HOLD" symbol indicates when data is held. |
|
Data access |
The "READ" symbol indicates when viewing data. |
|
Overflow display |
The "OL" symbol indicates over-range overflow. |
|
Interference test |
Automatically identifies interference signals; the "NOISE" symbol indicates an interference voltage higher than 5V. |
|
Auxiliary grounding test |
It has an auxiliary grounding resistance value testing function, ranging from 0.00KΩ to 30kΩ (100R+rC<50kΩ, 100R+rP<50kΩ). |
|
Alarm function |
When the measured value exceeds the alarm setting, a "beep-beep-beep" alarm will sound. |
|
Battery voltage |
When the battery voltage drops to approximately 7.5V, a low battery indicator " |
|
Operating current |
Standby: Approximately 20mA (backlight off) |
|
Power on with backlight on: approximately 45mA (backlight off: 25mA) |
|
|
Measurement: Approximately 100mA (backlight off) |
|
|
Quality |
Instrument: Approximately 1330 g |
|
Total weight: Approximately 4.5 kg (including packaging) |
|
|
Operating temperature and humidity |
-10℃～40℃; below 80% RH |
|
Storage temperature and humidity |
-20℃～60℃; below 70% RH |
|
Overload protection |
Measure grounding resistance: AC 280V/3 seconds between each port of C(H)-E and P(S)-ES. |
|
Insulation resistance |
20MΩ or higher (500V between circuit and casing) |
|
Pressure resistance |
AC 3700V/rms (between circuit and casing) |
|
Electromagnetic properties |
IEC61326(EMC) |
|
Suitable for safety regulations |
IEC61010-1 (CAT III 300V, CAT IV 150V, pollution level 2); IEC61010-031; IEC61557-1 (grounding resistance); IEC61557-5 (soil resistivity); JJG 366-2004. |
" will be displayed, reminding you to replace the battery.
3. Basic errors and performance indicators under reference conditions
|
Measurement function |
Measurement range |
accuracy |
Resolution |
|
Grounding resistance (R) |
0.00Ω～30.00Ω |
±2%rdg±3dgt |
0.01Ω |
|
30.0Ω～300.0Ω |
±2%rdg±3dgt |
0.1Ω |
|
|
300Ω～3000Ω |
±2%rdg±3dgt |
1Ω |
|
|
3.00kΩ～30.00kΩ |
±4%rdg±3dgt |
10Ω |
|
|
Soil resistivity (ρ) |
0.00Ωm～99.99Ωm |
(ρ=2πaR a :1 m～100m; π=3.14) |
0.01Ωm |
|
100.0Ωm～999.9Ωm |
0.1Ωm |
||
|
1000Ωm～9999Ωm |
1Ωm |
||
|
Soil resistivity (ρ) |
10.00kΩm～99.99kΩm |
(ρ=2πaR a :1 m～100m; π=3.14) |
10Ωm |
|
100.0 kΩm～999.9 kΩm |
100Ωm |
||
|
1000kΩm～9000kΩm |
1kΩm |
||
|
Grounding voltage |
AC 0.0～600V |
±2%rdg±3dgt |
0.1V |
Note 1. Additional error when rC max or rP max ≤ ±3%rdg±5dgt.
(rC max: 4kΩ+100R＜50kΩ; rP max: 4kΩ+100R＜50kΩ)
Additional error at 5V interference voltage ≤ ±5%rdg±5dgt.
Warning: Do not perform voltage measurements while the instrument is charging, connected to a computer, or powered externally.
Product features and applications
- Multiple measurement methods : Two/three/four-wire grounding resistance measurement, four-electrode method for soil resistivity measurement, and grounding voltage measurement from 0 to 600V.
- High-precision anti-interference : FFT+AFC anti-interference technology, four-wire method to eliminate line resistance and contact resistance errors.
- Intuitive operation : large backlit screen, one-click testing, automatic ranging, data hold/storage for 300 sets.
- Safe and reliable : Complies with IEC safety standards, overload/insulation/withstand voltage protection, audible and visual alarms, and interference warnings.
- Data management : USB upload to computer, supports saving, reporting, and printing, integrating on-site and back-end systems.
Prodection details
Power Industry
Grounding resistance testing of substations, towers, distribution rooms, and power lines
Telecommunications Industry
Testing of grounding devices for base stations, equipment rooms, towers, and fiber optic cables.
Building and Lightning Protection
Building lightning protection grounding, elevator, and fire protection system grounding tests
Meteorology and Industry
Grounding detection for weather stations, radar stations, factory electrical equipment, and large machinery.
Engineering Survey
Soil resistivity field measurement is used for grounding device design and acceptance.
Company Qualifications
FAQ
Q: Are you a factory or a trading company?
A: We are a professional manufacturer of testing equipment.
Q: How is the after-sales service?
A: The warranty period is 12 months. After the warranty period, we also provide lifetime service paidrepair or service.
Q: How is the after-sales service?
A: The warranty period is 12 months. After the warranty period, we also provide lifetime service paidrepair or service.
Q: What about transportation?
A: It depends on your requirements. We can ship to your airport by air, to your seaport by sea, or to your office by courier.
We also accept cooperation with your shipping agent.
Q: Are your keyboard, interface, software, and manuals in English?
A: Yes, if you are using the English version of the keyboard, interface, software, and manual and require other languages, please contact us for confirmation.
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