UNI-T UT516B Insulation Resistance Tester
The UNI-T UT516B Insulation Resistance Tester is a handheld instrument engineered to evaluate the integrity of electrical insulation in industrial and commercial environments. Encased in a robust, ergonomically contoured housing, the UT516B integrates a high-contrast backlit LCD display that guides technicians through the insulation test process. At its core, the device seamlessly generates precise DC test voltages, allowing users to monitor the decay of leakage current and assess insulation health. By sequentially delivering controlled voltages and measuring resistance response, the tester computes key diagnostic ratios such as polarization index and dielectric absorption ratio directly on-screen, promoting insightful analysis without external calculation.
Data from each test can be archived in the instrument’s memory bank, enabling longitudinal tracking of insulation degradation over time. The thoughtful arrangement of the rotary dial and function keys ensures quick configuration of test parameters, while built-in alerts notify operators of over-range conditions.
Designed for portability, the tester features durable connectors and a protective rubber boot that resists impacts and environmental wear, making it suitable for field service. With intuitive on-device prompts and the ability to offload stored data via a USB connection, the UT516B fosters efficient workflows, whether verifying new installations or performing routine preventive maintenance, ensuring system reliability.
Features:
- AC/DC Voltage Measurement Capability: Allows verification of both alternating and direct voltage levels during insulation testing.
- USB Data Transfer Interface: Enables seamless offloading of stored test results to a PC or compatible device for further analysis and record-keeping.
- Low-Battery Indication: Built-in warning alerts the user when battery levels are insufficient to guarantee accurate readings, preventing misleading measurements.
- On-Board Data Storage: Capable of storing up to 999 individual test records internally, facilitating trend analysis and periodic maintenance tracking without needing paper logs.
- Polarization Index (PI) Measurement: Automatically computes and displays the polarization index, aiding in the assessment of insulation aging and moisture content over time.
- Dielectric Absorption Ratio (DAR) Functionality: Calculates DAR values to help distinguish between surface leakage and bulk insulation deterioration.
- Over-Range Alarm: Provides audible/visual notification if the measured resistance exceeds the instrument’s measurement range, ensuring the user is immediately aware of out-of-range conditions.
- Maximum (MAX) Display Hold: Captures and holds the peak reading during a test, allowing the user to review the highest insulation resistance value without needing to watch the display continuously.
- LCD Backlight: Illuminates the display for easy reading in low-light or dimly lit environments, improving usability on field sites.
- Comparative Measurement Mode: Lets users compare successive readings against a reference value, simplifying the detection of insulation degradation trends.
- Adjustable Measurement Time Selection: Offers configurable test durations (e.g., 1 s, 10 s, 60 s) so users can tailor the measurement period according to different insulation diagnostic standards or workflows.
Specifications:
| Category | Specification |
|---|---|
| Test Voltages: | 500 V, 1 000 V, 2 500 V, 5 000 V, 10 000 V, 12 000 V |
| Output Voltage Accuracy: | 500 V–5 000 V: 0% to +10%; 10 000 V–12 000 V: –5% to +10% |
| Load Current: | 500 V–5 000 V: 1 mA ±(0–20%); 10 000 V–12 000 V: 0.15–1.2 mA ±(0–20%) |
| Insulation Resistance Ranges: | 500 V: 0.5 MΩ–500 GΩ 1 000 V: 1 MΩ–1 000 GΩ 2 500 V: 2.5 MΩ–2.5 TΩ 5 000 V: 5 MΩ–5.0 TΩ 10 000 V: 10 MΩ–10 TΩ 12 000 V: 12 MΩ–10 TΩ |
| Accuracy (per range): | Up to 99.9 GΩ: ±(5–15%) Above 100 GΩ: ±(10–20%) Highest ranges: for reference only |
| DC Voltage Measurement: | 30 V – 1 000 V, ±(3% + 5 digits) |
| AC Voltage Measurement: | 30 V – 750 V (50–60 Hz), ±(3% + 5 digits) |
| DAR Range: | 0.00 – 999 |
| PI Range: | 0.00 – 999 |
| Data Storage: | 999 sets of test results |
| USB Interface: | Yes, for PC connection and data transfer |
| LCD Backlight: | Yes, adjustable (0% – 100%) |
| Low Battery Indicator: | Yes |
| Safety Compliance: | IEC 61010-1, CAT IV 600 V |
Applications:
- Electrical Equipment Maintenance.
- Power Generation and Distribution.
- Industrial Equipment Testing.
- Routine Preventive Maintenance.
- High-Voltage Lab Testing.
- Commissioning and Quality Control.
- Railways and Transportation Systems.
- Telecommunications Infrastructure.
Package Contents:
- 1x UT516B, Test leads (red/black/green 1 each)
- 1x USB cable, power adaptor, 1.5V alkaline batteries
- 1x English manual
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