Megohmmeter and Insulation Resistance Tester | Test Precautions?

Megohmmeter and Insulation Resistance Tester/Digital Insulation Resistance Tester Multimeter - Test Precautions and Features? The test precautions and core features of the digital insulation resistance tester are as follows:

I. Test Precautions

1. Safety First, Thorough Discharge: Before testing, ensure the test sample is completely de-energized and short-circuit all electrodes. For capacitive test samples (such as long cables, large motors), the discharge time must be sufficiently long to ensure no residual charge.

2. Ensure Reliable Test Lead Connections: The test leads (especially the high-voltage "LINE" terminal) must be securely and cleanly connected to the test sample and instrument to prevent contact resistance from affecting measurement accuracy. During testing, the human body must not come into contact with the high-voltage leads.

3. Pay Attention to the Environment and "G" Terminal Usage: Record the ambient temperature and humidity, as they significantly affect the insulation resistance value for data comparison. When measuring test samples with significant surface leakage, the "GUARD" terminal must be used correctly to eliminate surface leakage current interference and obtain the true volume insulation resistance.

4. Reading Timing and Data Recording: For absorption ratio (R60s/R15s) or polarization index (R10min/R1min) tests, readings must be taken strictly according to the specified time points. Record the test voltage, insulation resistance value, and environmental conditions.

II. Core Features

1. Multiple Test Voltage Ranges and Automatic Calculation: Provides a variety of standard DC test voltages (e.g., 500V to 10kV) to accommodate test samples of different voltage levels. It features automatic calculation and display of absorption ratio and polarization index, greatly improving efficiency.

2. Strong Anti-interference Capability and Data Storage: Employs digital filtering technology to effectively suppress electromagnetic interference on-site, ensuring stable readings. Built-in memory can store a large amount of test data and timestamps for easy historical tracing and analysis.

3. Comprehensive Safety Protection and Portability: Features automatic terminal voltage discharge function, automatically discharging the test sample after testing. The instrument is rugged and portable, battery powered, and ideal for on-site inspections.

Summary: This instrument is a fundamental tool for evaluating the performance of insulating materials. Its value lies in its ability to conveniently and safely diagnose overall insulation defects such as moisture absorption and aging by accurately measuring insulation resistance and related indices. The core of safe operation is "discharge first, then connect," while the key to accurate measurement is "connecting the wires correctly and using the correct G terminal." The MS-3126A digital insulation resistance tester, a multimeter and high-voltage insulation resistance tester, has five ranges: 500V, 1000V, 2500V, 5000V, and 10000V, with a maximum testing capacity of 10TΩ.

Designed strictly according to safety standards:

1. Insulation resistance range 10TΩ@10kV, adjustable short-circuit current, maximum up to 10mA.

2. Automatically displays the polarization index (PI) and induced absorption ratio (DAR) test values, and can test leakage current and capacitance.

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