ND2502D Digital Insulation Resistance Tester

Product Introduction

        ND2502D Digital Insulation Resistance Tester, also known as a Megohmmeter or High-Voltage Insulation Resistance Meter, is used for insulation resistance testing. This instrument features a large LCD with gray-white backlight, data storage, data review, protection functions, automatic discharge, charging, and auto power-off. It also includes functions for measuring DC voltage, AC voltage, absorption ratio, and polarization index. The device is aesthetically designed, with a wide measurement range, high resolution, user-friendly operation, portability, accuracy, reliability, stable performance, high output power, and strong anti-interference capability.

       ND2502D Digital Insulation Resistance Tester is built with shockproof, dustproof, and moisture-resistant construction, making it suitable for harsh working environments. It is an essential instrument widely used in telecommunications, power systems, meteorology, data centers, oil fields, electromechanical installation and maintenance, and industrial enterprises utilizing electricity as a power source or energy. It is suitable for measuring the insulation resistance of various insulating materials, transformers, motors, cables, and electrical equipment.

       ND2502D Digital Insulation Resistance Tester is composed of medium and large-scale integrated circuits. It offers high output power and multiple output voltage levels (6 voltage levels). The rated insulation test voltage range is 500V to 10kV, and the insulation resistance measurement range is 0.01MΩ to 1000GΩ. The DC voltage measurement range is 0 to 1000V, and the AC voltage measurement range is 0 to 750V.

Product Features

☆ Six output voltage levels: 250V, 500V, 1000V, 2500V, 5000V, 10000V; resistance measurement range up to 0–1000GΩ

☆ 4-digit超大LCD display with gray-white backlight, adjustable for use in dimly lit environments

☆ Capable of measuring DC voltage, AC voltage, absorption ratio, and polarization index

☆ ND2502D Digital Insulation Resistance Tester is built with medium and large-scale integrated circuits, making it lightweight and multifunctional

☆ Utilizes an embedded industrial microcontroller and real-time operating software system; highly automated with strong anti-interference capability; automatically calculates absorption ratio and polarization index without manual intervention

☆ User-friendly interface; measurement results feature anti-power-off protection; can store up to 500 measurement results

☆ Audible alert when high voltage is generated

☆ Built-in residual high-voltage discharge circuit; automatically discharges residual high voltage from the tested equipment after measurement

☆ Dual power supply (AC/DC); includes rechargeable battery and AC adapter

☆ High-voltage short-circuit current ≥3mA; ideal for measuring insulation resistance of large transformers, mutual inductors, generators, high-voltage motors, power capacitors, power cables, lightning arresters, etc.

☆ USB interface for software monitoring; stored data can be uploaded to a computer for saving and printing

Technical Parameters

☆ Function: Insulation resistance testing, voltage testing

☆ Reference conditions: 23℃±5℃, below 75% RH

☆ Output voltage: 250V, 500V, 1000V, 2500V, 5000V, 10000V

☆ Resistance measurement: 0.01MΩ–1000GΩ; accuracy ±3% rdg ±5 dgt

☆ Insulation resistance resolution: 0.01MΩ

☆ DC voltage range: 0–1000V

☆ AC voltage range: 0–750V

☆ AC voltage resolution: 0.1V

☆ Output short-circuit current: ≥5mA (10000V)

☆ Polarization index and absorption ratio: Capable of measuring polarization index and absorption ratio

☆ Power supply: 12V rechargeable battery

☆ Data storage: 500 sets, reviewable

☆ Over-range: Over-range overflow function; displays "OL" symbol and alerts when measurement exceeds safety protection setting

☆ Auto power-off: Powers off after 15 minutes of inactivity

☆ Insulation resistance: ≥50MΩ

☆ Withstand voltage: AC 3kV/50Hz for 1 minute

☆ Operating temperature and humidity: –10℃ to +50℃, <85% RH

☆ Dimensions: 277mm x 227.5mm x 153mm

☆ Weight: 2.7kg