UNI-T UT253A Large Jaw Leakage Current Clamp Meter
The UNI‑T UT253A presents itself as a robust, thoughtfully engineered instrument poised to meet the demands of modern electrical diagnostics. At first glance, its substantial clamp mechanism immediately conveys capability: an expansive jaw, nearly as wide as a smartphone, opens smoothly over thick conductors and multi‐core cables alike. This broad aperture is housed within a sturdy, impact‑resistant frame, signaling both durability and precision. The clamp’s smooth action, paired with a reassuring click when fully engaged, underscores the product’s emphasis on reliable contact and user confidence in measurement integrity .
Beneath the clamp, the UT253A’s front face is dominated by a crisp, high‑contrast graphical display that organizes multiple readings at once. A soft backlight ensures legibility in dimly lit environments, while simple, tactile buttons flank the screen, each precisely keyed for rapid selection and data capture. The ergonomic placement of controls allows technicians to maintain a natural grip, minimizing hand fatigue during extended use. The housing’s gently contoured sides and balanced weight distribution further enhance comfort, even when working overhead or in confined spaces .
Internally, the UT253A marries analog sensitivity with digital intelligence. It seamlessly interprets minute currents down to fractions of a milliampere while simultaneously presenting voltage information, integrating complex calculations within its circuitry so that the user sees contextually relevant values without manual conversion. A built‑in microprocessor handles signal conditioning, averaging, and filtering, all packaged behind a sealed, battery‑powered chassis that resists dust and debris. Connectivity is subtly integrated: a concealed USB port allows data transfer without compromising the tool’s rugged exterior.
In its totality, the UNI‑T UT253A Large Jaw Leakage Current Clamp Meter embodies a synthesis of practicality and precision. Its generous jaw dimensions and intuitive interface make it a natural extension of the technician’s hand, while its intelligent display and solid build instill confidence that each reading whether of imperceptible leakage currents or live voltages is both accurate and actionable.
Features:
- Auto‑range measurement for hassle‑free operation
- RS‑232 interface for data communication
- LCD backlight for visibility in low‑light environments
- Data hold function to freeze readings on screen
- Over‑range display to alert when measurements exceed range
- Auto power‑off to conserve battery life
- Low battery indication to warn of waning power
Specifications:
| Specification | Details |
|---|---|
| Leakage Current Range: | 0 mA – 300 A / 300 A – 1200 A |
| Accuracy: | ±(1.5% + 3) for 0–300 A±(2% + 3) for 300–1200 A |
| Resolution: | 0.01 mA |
| Clamp Jaw Size: | 80 mm × 80 mm |
| Max Cable Size: | Up to 96 mm diameteror 160 mm × 4 mm flat-steel |
| Voltage Measurement: | Three-phase measurement supported |
| Safety Category Rating: | CAT III 600 V |
| Display: | 128 × 64 dots LCD with backlight |
| Test Mode: | Clamp CT integration |
| Data Logging: | Supported |
| Power Supply: | 4 × 1.5 V batteries (LR6) |
| Product Dimensions: | 275 mm × 145 mm × 40 mm |
| Net Weight: | 830 g |
| Interface: | USB port, RS-232 support |
Applications:
- Measuring leakage current in high-capacity industrial cables.
- Monitoring three-phase voltage systems.
- Testing electrical grounding systems.
- Routine maintenance and safety inspections.
- Troubleshooting in large-scale electrical systems.
Package Include:
- 4x 1.5 V LR6 Batteries
- 3x Test leads (red)
- 1x Test lead (black)
- 1x USB cable
- 1x English manual
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