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Product Details

Ground resistance · Soil Resistivity Tester It is meticulously designed and manufactured in accordance with the latest standards for lightning protection and grounding resistance testing, specifically for on-site measurements of grounding resistance, soil resistivity, ground voltage, and AC voltage. With a test current of up to 10 mA, it employs digital and microprocessor technologies, enabling precise measurements of grounding resistance using the four‑wire method, the three‑wire method, and the simplified two‑wire method. It also incorporates FFT (Fast Fourier Transform) and AFC (Automatic Frequency Control) technologies. It automatically detects interference and selects the measurement frequency, minimizing its impact and delivering more accurate grounding resistance readings. It features unique anti-interference and environmental adaptability, with excellent repeatability in testing, ensuring high precision, high stability, and high reliability over long-term measurements. It is widely used in electrical applications. Power, telecommunications, meteorology, oilfields, construction, lightning protection, and industrial electrical equipment Measurement of grounding resistance, soil resistivity, ground potential, and AC voltage.

Ground resistance · Soil Resistivity Tester Also known as Precision ground resistance tester, four-wire ground resistance tester, two-, three- and four-wire ground resistance testers, soil resistivity tester , comprising a host unit, data software, test leads, auxiliary grounding rods, communication cables, and other components. The host unit features a dedicated toolbox-style design, using Polypropylene plastic is used as the raw material, with a novel compound added. One-shot injection molding with filler material It boasts lower density and superior strength, stiffness, hardness, wear resistance, heat resistance, and electrical insulation. Its enclosure can withstand pressures of approximately 200 kg, ensuring high precision, stability, and reliability across a wide range of environmental tests. The main unit features an extra-large LCD display with backlighting and bar‑graph indicators for clear, instant readability. Additionally, it can store up to 300 data sets, and dedicated software enables functions such as historical data retrieval, review, saving, report generation, and printing. 。

Merit    Can

Ground resistance and soil resistivity testing; ground voltage and AC voltage testing.

Electricity    Source

11.1V 2600mAh rechargeable lithium battery

Back    Light

Controllable white-screen backlight, ideal for use in low-light environments.

Measurement method

Precision 4-wire and 3-wire measurement, as well as simple 2-wire measurement of grounding resistance.

Measurement method

Ground resistance: Rated current pole‑shift method, with a maximum measurement current of 20 mA.

Soil resistivity: four-electrode method ( Winner method)

Ground voltage: Average value rectification ( P(S) - ES Between interfaces)

Quantity    Cheng

Two‑, three‑, and four‑wire methods for measuring grounding resistance (R): 0.000Ω～200.0kΩ

Soil resistivity (ρ): 0.000Ωm~9999kΩm

Ground voltage:   AC 0.001V～600V (50Hz/60Hz)

Maximum resolution

Two‑, three‑, and four‑wire methods for measuring grounding resistance (R): 0.001Ω

Soil resistivity (ρ): 0.01 Ω·m

Ground voltage: 0.001V

Refined    degree

Two‑, three‑, and four‑wire methods for measuring grounding resistance (R):

  1. 0.000 Ω to 10.00 kΩ :  ±2%rdg±5dgt

  2. 10.0K~100.0kΩ : ±3%rdg±5dgt

  3. 100.0K~200.0kΩ : ±3.5%rdg±5dgt

Note: At an interference voltage of 5 V, the additional error is ≤ ±5% of reading ± 5 digits.

Soil resistivity (ρ): It depends on the measurement accuracy of R.

(ρ=2πaR (a:1 m～100m); π=3.14)

Ground voltage: ±2%rdg±5dgt (50Hz/60Hz)

Test voltage waveform

Sine wave

Test frequency

412 Hz, 825 Hz, 1280 Hz (automatic frequency selection)

Short-circuit test current

AC 10mA max

Open-circuit test voltage

AC 90V max

Electrode spacing range

1m ~ 100m

Change    挡

Ground resistance: 0.000 Ω Ω～ 200k Ω Fully automatic gear shifting

Soil resistivity: 0.00 Ωm～ 9999k Ωm fully automatic gear shifting

LCD

6 people LCD display, white-screen backlight

LCD size

128mm×75mm

LCD display area

124mm×67mm

Measurement indication

During measurement, the LED flashes to indicate status, the LCD displays a countdown, and a progress bar provides visual feedback.

Size

Instrument dimensions: approximately 320 mm (length) × 275 mm (width) × 145 mm (height)

Outer packaging dimensions: approximately 400 mm (length) × 245 mm (width) × 335 mm (height)

Standard test cable

4 pieces: 1 red, 15 m; 1 black, 15 m; 1 yellow, 10 m; and 1 green, 10 m.

Simple test lead

2 pieces: 1 red 1.6 m and 1 black 1.6 m.

Auxiliary grounding rod

4 pieces: approximately phi 10mm×200mm

Measurement time

Ground voltage: approximately 2 times per second; grounding resistance: approximately 7 seconds per measurement; soil resistivity: approximately 7 seconds per measurement.

Number of measurements

More than 5,000 cycles (short-circuit test: measure once, pause for 30 seconds, then measure again)

Line voltage

Measurement below 600 V AC

Communication interface

Equipped with a USB interface, data can be uploaded to a computer for storage and printing.

Communication line

One USB communication cable, 1.5 m long.

Data retention

When preserving data “ HOLD Symbol indication

Data storage

300 groups, “ HOLD Storage indication, display “ FULL “Indicates that storage is full”

Data Retrieval

When viewing data “ READ Symbol indication

Overflow display

When an overrange overflow occurs “ Office lady Symbol indication

Interference Testing

Automatically identifies interference signals when the interference voltage exceeds 5 V. NOISE Symbol indication

Alarm function

When the measured value exceeds the alarm setpoint, a “beep–beep–beep” alarm is triggered.

Battery voltage

When the battery voltage is low, a low‑battery indicator appears to remind you to recharge the battery.

Automatic shutdown

If no operation is performed, the device will automatically shut down 15 minutes after being turned on.

Operating current

Standby: 25 mA max (backlight off); Backlight: 25 mA max (backlight power consumption alone); During measurement: 150 mA max (backlight off)

Quality    Quantity

Instrument: approximately 2.66 kg (including battery)

Total weight: approximately 6.88 kg (including packaging)

Toolbox

Military-grade toolbox design, capable of supporting up to 200 kg.

Operating temperature and humidity

-10℃ to 40℃; below 80% RH

Storage temperature and humidity

-20℃ to 60℃; below 70% RH

Overload protection

Measuring ground resistance: C (H) -E、 P (S) -ES AC 280V for 3 seconds between each port

Insulation resistance

Greater than 20 MΩ (500 V between the circuit and the enclosure)

Durability    Pressure

AC 3700 V/rms (between circuit and enclosure)

Electromagnetic properties

IEC61326 (EMC)

Suitable for safety regulations

IEC 61010-1 (CAT III 300 V, CAT IV 150 V, Pollution Degree 2);

IEC 61010-031; IEC 61557-1 (Earth Resistance); IEC 61557-5 (Soil Resistivity); JJG 366-2004 (Earth Resistance Meter)

 

 

Keywords:

NDET Series Ground Resistance Tester

Service system

Offering inspection and reception services

We guarantee to welcome your visit at any time and provide you with every possible convenience.

Provide a reasonable quotation.

We guarantee to provide a unified, reasonable quotation for the products you request within 24 hours.

Provide professional technical support

We guarantee that a technical specialist will respond to any technical questions you may have within 24 hours.

Provide detailed information

We guarantee that, within 24 hours, the product catalogues, software CDs, and other technical materials you require will be delivered to your company by our local branch or office.

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