UNI-T UT251C High Sensitivity Leakage Current Clamp Meters
The UNI‑T UT251C is built on the proven UT251 series platform to bring laboratory‑grade leakage‑current detection into a truly portable clamp meter. Encased in a slender, ergonomic pistol‑grip housing, it weighs barely over 100 g and measures just 175 × 70 × 38 mm, making it unobtrusive in a technician’s pouch yet robust enough for heavy field use. Its 35 × 40 mm jaw slips effortlessly around single conductors even in densely packed panels so that minute insulation faults and parasitic leakages are revealed without circuit disruption.
At the heart of the UT251C is a highly sensitive core that resolves currents down to the microampere level, turning invisible bleed‑off into actionable data. As soon as the clamp closes, the instrument’s auto‑ranging circuitry and four‑digit LCD spring to life, displaying a stable, noise‑reduced reading. Should the meter encounter a transient surge, its peak‑hold captures and retains the highest value until manually cleared, helping troubleshoot elusive spikes that would otherwise go unnoticed.
Despite its precision, the UT251C is remarkably intuitive there are no complex menus or hidden modes. A single rotary action selects between standard leakage clamp testing and integrated leakage‑accumulation mode, which sums current over time for long‑term diagnostic insights. Once a measurement is taken, the data‑hold feature freezes the display, and the backlit screen ensures legibility in dimly lit switchrooms. If left idle, the meter conserves its single 9 V battery by powering down after five minutes, yet it can be forced to stay awake for continuous monitoring.
Beyond its core measurement abilities, the UT251C offers seamless PC integration via RS‑232, so logged data can be streamed directly into analysis software eliminating manual transcription and enabling detailed trend reports. Its CAT III 600 V safety rating and clear overload “OL” warning protect both user and instrument against unexpected voltage backfeed. In sum, the UT251C distills advanced leakage‑current metrology into a handheld form factor, giving electricians, maintenance engineers, and safety inspectors a tool that’s as easy to carry as it is precise to operate.
Features:
- 4‑digit LCD display
- Overload protection with “OL” indication
- Auto‑range selection
- Auto‑power‑off after 5 minutes of inactivity
- RS‑232 interface for direct data logging
- Low‑battery indication (battery OK down to 7.2 V)
- Peak‑hold function to capture transient spikes
- Over‑range display (“OL”)
- Data‑hold to freeze readings on‑screen
- Test modes: clamp‑CT mode and integrated leakage‑accumulation mode
- Built‑in data storage (up to 99 readings)
Specifications:
| Parameter | UT251C Specification |
|---|---|
| Leakage Current Ranges: | 0.001 mA–60 A ∙ 60 A–199.9 A ∙ 200 A–300 A ∙ 300 A–600 A |
| Resolution: | 1 mA |
| Accuracy by Range: | ±(1.5 % + 5) (0.001 mA–60 A) ±(2 % + 5) (60 A–199.9 A) ±(3 % + 5) (200 A–300 A) ±(4 % + 5) (300 A–600 A) |
| Voltage (Frequency): | 0 V–600 V (50 Hz/60 Hz) |
| Safety Category Rating: | CAT III 600 V |
| Clamp Jaw Opening: | 35 × 40 mm |
| Data Storage Capacity: | 99 readings |
| Display: | 4‑digit LCD with “OL” overload indication |
| Auto‑Power‑Off: | After 5 minutes of inactivity |
| Interface: | RS‑232 for direct data logging |
| Power Supply: | 1 × 9V battery (6F22) |
Applications:
- Electrical Equipment Inspection.
- Power Equipment Maintenance.
- Electric Safety Testing.
- Cable and Conductor Monitoring.
- Leakage Current Analysis in Power Grids.
- Preventive Maintenance Programs.
Package Include:
- 1× 9 V battery (6F22)
- 1× RS‑232 interface cable
- 1× English user manual
- 1× Gift box
- 1× Carrying bag
- 1× Tool box
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