Product OverviewThe UNI-T UT502C is a high-performance digital insulation resistance tester (commonly referred to as a "megohmmeter") designed to meet the rigorous demands of industrial electrical maintenance, utility diagnostics, and equipment commissioning. It is an essential instrument for evaluating the integrity of insulation in motors, cables, transformers, and switchgear, helping professionals prevent short circuits and catastrophic electrical failures.Engineered for precision and safety, this model provides accurate resistance measurements alongside advanced diagnostic functions like Polarization Index (PI) and Dielectric Absorption Ratio (DAR).Key FeaturesMultiple Test Voltages: Offers four selectable test voltages (250V, 500V, 1000V, and 2500V) to accommodate a wide range of electrical equipment and insulation classes.Advanced Diagnostic Modes: Features automatic calculation of PI (Polarization Index) and DAR (Dielectric Absorption Ratio), which are critical for assessing the long-term health and degradation of insulation in high-voltage motors and transformers.Safety First: Includes an Auto-Discharge function that safely bleeds off stored capacitive voltage after a test is completed, protecting both the operator and the equipment.Comparative & Timer Testing: Supports a "Compare" function for quality control and a built-in timer for timed insulation resistance measurements.User-Centric Design: Features a large, high-contrast backlit LCD with an analog bar graph, allowing for easy visualization of resistance trends, and a rugged, portable housing suitable for field environments.Safety Compliance: Built to meet IEC 61010-1 CAT IV 300V / CAT III 600V standards.Technical SpecificationsFeatureSpecificationBrandUNI-TModelUT502CTest Voltages250V / 500V / 1000V / 2500VInsulation Resistance Range0.1MΩ – 20GΩShort-Circuit Current< 2mAAC/DC Voltage Measurement30V – 600VSafety StandardCAT IV 300V / CAT III 600VDisplay2000-count LCD with BacklightPower Source6 x 1.5V (AA) BatteriesDimensions150 x 100 x 71 mmWeightApprox. 600g (without batteries)SEO KeywordsUNI-T UT502C, Insulation Resistance Tester, Digital Megohmmeter, Megger Tester, Insulation Integrity, PI/DAR Diagnostics, High Voltage Insulation Tester, UNI-T 502C Specs, Electrical Safety Tester, Industrial Insulation Meter.Note: The "Guard" terminal on the UT502C is highly effective for eliminating the effects of surface leakage current. When testing high-resistance insulators, using the guard connection ensures your results reflect the true internal insulation resistance rather than surface contamination or moisture.