UNI-T UT512D Insulation Resistance Testers

UNI-T UT512D Insulation Resistance Testers

The UNI-T UT512D is a digital high-voltage insulation resistance tester tailored for professionals in industries like electric power, telecommunication, and meteorology. It features multiple test voltage ranges—250V, 500V, 1000V, and 2500V—each adjustable in 10% steps, offering flexibility and precision for diverse testing needs. Key functionalities include polarization index (PI) and dielectric absorption ratio (DAR) measurements, vital for evaluating insulation quality over time. The tester supports various modes, such as continuous insulation resistance measurement, timer measurement, and comparison measurement, enhancing its versatility.

The UT512D boasts an insulation resistance measurement range from 0.25MΩ to 1.0TΩ, with accuracies as precise as ±(5%+5) in specific ranges. It delivers a short-circuit current of approximately 3.5mA and measures leakage current automatically. Beyond insulation testing, it can assess AC voltages up to 750V and DC voltages up to 1000V, making it a multifunctional tool for electrical diagnostics. Safety features are robust, including automatic discharge after testing, a high voltage alarm, and a monitoring function that prevents testing if the voltage exceeds 36V, safeguarding both the device and the operator.

Equipped with a clear LCD display, the UT512D shows real-time data such as output voltage, insulation resistance, and leakage current, with a backlight for low-light conditions. It stores up to 999 data sets, transferable to a PC via USB for analysis, streamlining fieldwork and reporting. Weighing about 1800g and measuring 238 x 166 x 90.5 mm, it’s portable yet durable, powered by 8 LR14 alkaline batteries. Accessories like test leads and a USB cable are included. Ideal for testing cables, motors, transformers, and more, the UT512D ensures the safety and reliability of electrical systems, making it indispensable for electricians and engineers.

Features:

• Output Voltage Range: 250 V, 500 V, 1000 V and up to 2500 V for versatile insulation testing.
• Polarization Index (PI) & Dielectric Absorption Ratio (DAR): Built‑in PI/DAR measurement functions to assess insulation health over time.
• Short‑Circuit Current Measurement: Monitors test current (≈3.5 mA max) to evaluate circuit loading.
• Automatic Leakage‑Current Display: Continuously shows leakage current during tests to help pinpoint faults.
• Stepping Voltage: Adjustable in 10 % increments of the selected range for stress profiling.
• High‑Voltage Alarm & Auto‑Discharge: Audible/visual alert when high voltage is present and automatic discharge of stored charge post‑test.
• Data Storage & PC Software: Logs up to 999 sets of measurements, transferable via USB for in‑depth analysis.
• Safety Rating: CAT IV 600 V overvoltage category suitable for industrial environments.

Insulation Resistance Ranges & Accuracy:

Auxiliary Measurement Functions:

Physical & Safety Characteristics:

Applications:

• Electric power utilities
• Telecommunications
• Meteorological stations
• Machine rooms
• Oil fields
• Industrial and mining enterprises
• General electrical installation and maintenance
• Measuring insulation resistance of: Cables, Motors, Generators, Transformers, Mutual inductors, High-voltage switches and Lightning arresters

Package Include:

• 1x UNI-T UT512D Insulation Resistance Tester
• 3x Test Leads (Red, Black, Green)
• 1x USB Cable
• 1x User Manual
• 1x Carrying Strap
• 8x LR14 Alkaline Batteries

UNI-T UT512D Documents:

• Datasheet 
• User Manual