The UNI-T UT505A is a robust, handheld instrument that seamlessly integrates the functionality of a digital multimeter with that of an insulation resistance tester. Encased in a durable, impact-resistant housing, it is designed to withstand the rigors of industrial and field environments while remaining comfortable in the users hand. A large, backlit display presents both analog and digital readings clearly, allowing technicians to quickly assess measurements even in low-light conditions. True RMS measurement capability ensures accurate readings of both steady-state and fluctuating signals, enhancing the reliability of data collected on-site.
The devices user interface is intuitive, with a rotary dial and straightforward menu structure that minimize the learning curve and streamline operation during routine inspections. Built-in timing functions enable users to perform polarization index and dielectric absorption ratio tests, providing deeper insights into insulation integrity without requiring separate instruments. Additionally, theUT505Aincorporates an auto-discharge function that safely dissipates residual charge after testing, improving safety and preventing test lead damage.
Ergonomic design elements such as a non-slip grip and strategically placed function buttons ensure ease of use during prolonged testing sessions. Lightweight yet rugged, this tester balances precision measurement with practical usability, making it an indispensable tool for professionals tasked with verifying the health of electrical insulation in motors, transformers, cables, and other critical components.
| Specification | Details |
|---|---|
| Insulation Resistance (): | 0.01 M 50 M @ 50 V 0.01 M 100 M @ 100 V 0.01 M 200 M @ 250 V 0.01 M 500 M @ 500 V 0.01 M 1000 M @ 1000 V |
| Leakage Current (A): | 10 A 2000 A (tested at each voltage level) |
| Low Resistance (): | 0.01 20 k ( 5 V open-circuit, > 200 mA short-circuit current) |
| General Resistance (): | 0.01 k 10 M |
| DC Voltage (V): | 0 V 600 V |
| AC Voltage (V): | 0 V 600 V (True RMS) |
| Frequency (Hz): | 45 Hz 1 kHz |
| Capacitance (F): | 100 pF 500 F |
| Display Count: | 6000 |
| Step Test Voltage: | Selectable: 50 V, 100 V, 250 V, 500 V, 1000 V (each with 1 mA short-circuit current) |
| Short-Circuit Current (Insulation Test): | 1 mA |
| Load Current (Low Resistance Mode): | 10 A 2000 A |
| Continuity (Low Resistance) Current: | 5 V open-circuit / > 200 mA short-circuit (20 mA optional) |
| Auto Power Off: | Yes |
| Auto Range: | Yes |
| LCD Backlight: | Yes |
| Data Hold: | Yes |
| Low Battery Indication: | Yes |
| Compliance Standards: | IEC 61557-1:2007; IEC 61557-2:2007; IEC 61557-4:2007 |
| Additional Test Modes: | DAR/PI (Dielectric Absorption Ratio / Polarization Index) Timing measurement Comparison (Go/No-Go) Auto-fuse check (UT505B only) High-voltage output alarm Auto-discharge after insulation test Continuity buzzer 99-group on-board data storage |
| Display Type: | Dual analog bar graph + 6000-count digital readout |
| Power Supply: | Six 1.5 V (LR6) batteries |
| Product Net Weight: | 630 g |
| Product Size (HxWxD): | 225 mm 103 mm 59 mm |
| Standard Accessories: | Batteries, test leads, test probes, alligator clips, carrying bag, English manual |
| Optional Accessory: | Remote test lead |
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