Product Introduction

       The ND2571B Digital Ground Resistance Soil Resistivity Tester, also known as the four-wire ground resistance tester or soil resistivity tester, is a commonly used instrument for inspecting and measuring ground resistance. It features an extra-large LCD gray-white backlit display and microprocessor technology, enabling ground resistance testing via 2-wire, 3-wire, and 4-wire methods, as well as soil resistivity testing, all controlled by the microprocessor.

       The ND2571B Digital Ground Resistance Tester integrates numerous grounding test functions, allowing for quick and comprehensive measurement of various parameters in grounding networks. It is a new-generation grounding measurement instrument that replaces traditional megger measurements. It is widely used in telecommunications, power, meteorology, computer rooms, oil fields, power distribution lines, transmission towers, gas stations, factory grounding networks, lightning rods, and more. The instrument is characterized by its accuracy, speed, simplicity, stability, and reliability.

       The ND2571B Digital Ground Resistance Tester is microprocessor-controlled, providing precise detection of ground resistance, soil resistivity, and ground voltage. It utilizes fast filtering technology to minimize interference and can store up to 500 sets of data.

Product Features

☆、Function: Two-, three-, and four-wire measurement of ground resistance and soil resistivity; ground voltage measurement

☆、Measurement Methods: Precision 4-wire, 3-wire method, and simple 2-wire ground resistance measurement

☆、Measurement Techniques: Ground resistance: rated current polarity reversal method; Soil resistivity: four-pole method; Ground voltage: average rectification (between S-FR interfaces)

☆、Backlight: Controllable gray-white backlit screen, suitable for use in dimly lit environments

☆、Display Mode: 4-digit extra-large LCD display with gray-white backlight

☆、Measurement Methods: Precision three-wire measurement and simple two-wire measurement

☆、Measurement Time: Ground voltage: approximately 2 times/second; Ground resistance: approximately 7 seconds/measurement

☆、Data Storage: 500 sets, with "FULL" symbol flashing to indicate full storage

☆、Protection Function: Safety signal alert when measurement exceeds the safety protection setting

☆、Overrange Display: Overrange function with "OL" symbol display

☆、Auto Power Off: "APO" indicator, automatically shuts off after 15 minutes of inactivity

☆、Overload Protection: Ground resistance measurement: AC 280V/3 seconds between H-E and S-FR ports

Technical Parameters

☆、Ground Resistance Range: 0.00Ω～30.00kΩ, accuracy ±25%rdg±5dgt

☆、Soil Resistivity Range: 0.00Ωm～9999kΩm

☆、Resistance Resolution: 0.01Ω

☆、Ground Voltage Range: AC 0～600V, accuracy ±2%rdg±3dgt

☆、Ground Voltage Resolution: 0.01V

☆、Test Frequency: 128Hz

☆、Reference Conditions: 23℃±5℃, below 75%rh (auxiliary ground resistance 100Ω±5%, ground voltage <10V)

☆、Power Supply: 6 x 1.5V (LR14) alkaline batteries

☆、Insulation Resistance: Above 20MΩ (between circuit and case at 500V)

☆、Withstand Voltage: AC 3700V/rms (between circuit and case)

☆、Dimensions: 240mm x 188mm x 85mm

☆、Line Voltage: Ground voltage measurement: below AC 600V

☆、Weight: Instrument: 1230g (including batteries); Test leads: 610g (including simple test leads)

☆、Operating Environment: -10℃～40℃; below 80%rh

☆、Storage Environment: -20℃～60℃; below 70%rh