Description
UNI-T UT505A Handheld Insulation Resistance Testers
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 user’s 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 device’s 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, the UT505A incorporates 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.
Features:
- Combines digital multimeter and insulation resistance tester functions.
- True RMS measurement for accurate readings on steady‐state and fluctuating signals.
- Analog bar graph display alongside digital readout.
- DAR/PI (Dielectric Absorption Ratio/Polarization Index) and timing measurement capability.
- Comparison measurement mode for quick go/no-go testing.
- Auto‐discharge function to safely dissipate residual charge after tests.
- High-voltage output alarm to warn of live test voltage.
- Continuity buzzer for rapid low-resistance checks.
- 99-group data storage for on-board logging of test results.
Specifications:
| Specification | Details |
|---|---|
| Insulation Resistance (Ω): | 0.01 MΩ – 50 MΩ @ 50 V 0.01 MΩ – 100 MΩ @ 100 V 0.01 MΩ – 200 MΩ @ 250 V 0.01 MΩ – 500 MΩ @ 500 V 0.01 MΩ – 1000 MΩ @ 1000 V |
| Leakage Current (A): | 10 μA – 2000 μA (tested at each voltage level) |
| Low Resistance (Ω): | 0.01 Ω – 20 kΩ (≈ 5 V open-circuit, > 200 mA short-circuit current) |
| General Resistance (Ω): | 0.01 kΩ – 10 MΩ |
| 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 μF |
| 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 μA – 2000 μA |
| 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 |
Applications:
- Motor Insulation Testing.
- Cable Testing.
- Transformer Inspection.
- Switch and Circuit Breaker Testing.
- Electrical Appliance Testing.
- Insulated Materials Evaluation.
Package Contents:
- 6x Batteries (1.5 V LR6)
- 1x Test Leads
- 2x Test Probes
- 2x Alligator Clips
- 1x Carrying Bag
- 1x English Manual
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