UNI-T UT502A Insulation Resistance Tester

High-Voltage Multi-Output Insulation Testing: Delivers selectable test output voltages (500V, 1000V, and 250V) to measure insulation resistance accurately up to 20G ohms.

Automated PI & DAR Diagnostics: Automatically calculates Polarization Index (PI) and Dielectric Absorption Ratio (DAR) for advanced insulation degradation analysis and preventive maintenance.

AC Voltage & Low Resistance Continuity: Measures AC line voltage (30V - 600V) alongside low-resistance continuity testing (0.01 ohms - 200 ohms) with a fast audible buzzer.

High-Voltage Alarm & Auto-Discharge: Features a high-voltage warning indicator light and an auto-discharge safety circuit that safely drains residual capacitance after testing.

Large Backlit LCD with Analog Bar Graph: HD digital display features a clear backlight and a 9999-count readout with an integrated analog bar graph for visual reading tracking.

Continuous Lock Test Function: Includes a hands-free lock-test button for extended, long-term continuous insulation testing.

Housing & Accessory Hardware: Impact-resistant, double-insulated ABS protective body casing with heavy-duty insulated alligator clip test leads and a protective carrying strap.

Technical Specifications:

Insulation Test Voltages: 500V / 1000V / 2500V.

Insulation Resistance Range: 0.00M ohms- 20G ohms.

AC Voltage Range: 30V - 600V (50/60Hz).

Power Supply: Powered by 6 x 1.5V AA batteries.

Usage & Safety Instructions: CAT III 600V Rated. Always verify circuits are de-energized and fully discharged before connecting test leads.

Maintenance & Cleaning: Keep input ports clean and free of dust or oil. Wipe the housing with a soft, dry microfiber cloth

Essential High-Voltage Diagnostic Upgrade: Position as an upgraded insulation tester over basic meters, tailored for industrial electricians, motor rewind specialists, and high-voltage substation technicians.

Highlight 2500V Range & PI/DAR Ratio Testing: Emphasize its high 2500V output threshold and automated PI/DAR ratio calculations for deep cable and transformer testing.

Recommended Cross-Sell Add-ons: Pair with UNI-T UT 511 Insulation Resistance Tester (100V - 1000V), UNI-T UT501A Insulation Resistance Tester, UNI-T UT 582+ Digital RCD (ELCB) Tester, and DL8003 12-240V AC.DC digital test pen.

Flagship Insulation Safety Star: Feature as a top-tier electrical safety instrument in your Other Measuring Instruments collection.