Wrindu RD3000B Grounding Resistance Tester Earth Resistance Tester (0,000Ω ～ 30000Ω)

Power source: DC 7.4V 1.8Ah rechargeable lithium battery, the battery is full of about 8.4V

Backlight: Controllable white screen backlight, suitable for dark places

Measurement method: Precision 4-wire, 3-wire measurement, simple 2-wire measurement of ground resistance

Measurement method:

- Grounding resistance: rated current changing pole method, measuring  current 20mA Max

- Soil resistivity: four-pole method (Winner method)

- Voltage to ground: average rectification (between P (S) -ES interface)

Measuring range: 

- Measure the ground resistance (R) with two, three and four wires: 0.000Ω ～ 30000Ω

- Soil resistivity (ρ): 0.00Ωm ～ 9000kΩm

- Ground voltage: AC 0.0 ～ 100.0V

Maximum resolution:

- Two, three or four wire method for measuring ground resistance (R): 0.001Ω

- Soil resistivity (ρ): 0.01Ωm

- Ground voltage: 0.1V

Precision:

- Two, three and four wire method for measuring grounding resistance (R):

+ ± 2% rdg ± 5dgt (0.000Ω ～ 29.999Ω)

+ ± 2% rdg ± 3dgt (30.00Ω ～ 2999.9Ω)

+ ± 4% rdg ± 3dgt (3000Ω ～ 30000Ω)

- Soil resistivity (ρ): according to the measurement accuracy of R  (Ρ = 2πaR a: 1 m ～ 100m; π = 3.14)

- Ground voltage: ± 2% rdg ± 3dgt

- Note: 1. The additional error at rC max or rP max is ≤ ± 5% rdg ± 5dgt. (rC max: 4kΩ + 100R ＜ 50kΩ, rP max: 4kΩ + 100R ＜ 50kΩ)

            2. The additional error at 5V interference voltage is ≤ ± 5% rdg ± 5dgt.

Test voltage waveform: sine wave

Test frequency: 128Hz / 111Hz / 105Hz / 94Hz (automatic frequency selection)

Short-circuit test current: AC 20mA max

Open circuit test voltage: AC 40V max

Electrode distance range: 1m～100m

Gear shifting: 

- Ground resistance: 0.000Ω ～ 30000Ω Full automatic shift

- Soil resistivity: 0.00Ωm ～ 9000kΩm Full automatic shift

LCD: LCD 6-digit LCD display, white screen backlight

LCD size: 128mm×75mm

LCD display field: 124mm×67mm

Measurement indication: LED flashing indication during measurement, LCD countdown, progress bar graph indication

Charging indicator: The indicator light on the charger is red when charging, and green when fully charged

Size:

- Instrument size: 320mm × 275mm × 145mm

- Outer package size: 400mm × 245mm × 335mm

Standard test leads: 4 standard test leads: 20m for red, 20m for black, 10m for yellow, 10m for green

Simple test lines: 2 simple test lines: 1.6m each for red, 1.6m each for black

Auxiliary ground rods: 4 strings: φ10mm × 150mm

Measurement time: Voltage to ground: about 2 times / second; ground resistance: about 7 seconds / time; soil resistivity: about 7 seconds / time

Measurement times: 5000 times or more (short-circuit test, measure once, stop for 30 seconds and then measure)

Line voltage: AC 600V or less

Communication interface: With RS232 interface, the stored data can be uploaded to a computer, saved and printed

Communication line: 1 string RS232 communication line, 1.5m long

Data hold: "HOLD" symbol indicates when data is held

Data storage: 2000 sets, "MEM" storage indication, "FULL" indicates that the storage is full

Data review: "READ" symbol indication when reviewing data

Overflow display: "OL" symbol indication when overrange overflow

Interference test: Automatic recognition of interference signals, interference voltage is higher than 5V. "NOISE" symbol indicates

Auxiliary ground test: With auxiliary ground resistance value test function, 0.00kΩ ～ 30000Ω (100R + rC <50kΩ, 100R + rP <50kΩ)

Alarm function: When the measured value exceeds the alarm set value, “beep--beep--beep--” alarm prompts

Battery voltage: When the battery voltage is low, the low battery voltage symbol is displayed to remind you to charge the battery.

Auto power off: Auto power off 15 minutes after power on

Working current: Standby: 25mA Max (backlight off); Backlight: 25mA Max (backlight power consumption alone); Measurement: 150mA Max (backlight off)

Quality: 

- Instrument: 2.66kg (including battery)

- Total weight: 6.88kg (including packaging)

Tool box: Military tool box design, can bear 200kg

Working temperature and humidity: -10 ℃ ～ 40 ℃; below 80% rh

Storage temperature and humidity: -20 ℃ ～ 60 ℃; below 70% rh

Overload protection: Measurement of ground resistance: AC 280V / 3 seconds between each port of C (H) -E, P (S) -ES

Insulation resistance: Above 20MΩ (500V between circuit and case)

Withstand voltage: AC 3700V / rms (between circuit and case)

Protection class: IP54

Electromagnetic characteristics: IEC61326(EMC)

Suitable for safety regulations:

- IEC61326 (EMC)

- IEC61010-1 (CAT III 300V, CAT IV 150V, pollution degree 2);

- IEC61010-031; IEC61557-1 (ground resistance); IEC61557-5 (soil resistivity); JJG 366-2004 (ground resistance table).

Product features:

1. Special toolbox design for mainframe, using polypropylene plastic as raw material, one-time injection molding with new compound filler, low density, strength, stiffness, hardness, abrasion resistance, heat resistance and insulation performance are superior.

2. Its box can withstand The pressure of about 200kg ensures high accuracy, high stability and high reliability in various environmental tests.

3. The host's large LCD display with backlight and bar graph indication is clear at a glance.

4. It can store 2000 sets of data. Through the data software, functions such as reading, checking, saving, reporting, and printing of historical data can be realized.