UNI-T UT278B Ground Pile Clamp Earth Resistance Tester
The UNI-T UT278B is a handheld ground pile clamp tester that centers on simplicity and reliability for on-site earth resistance checks. Its most notable design element is the large, 2.4-inch color display, which presents measurements clearly and makes menu navigation intuitive, even in direct sunlight or low-light conditions. The unit’s molded housing incorporates a hinged, 68 mm-wide jaw that opens easily to encircle grounding rods or conductors without requiring disconnection streamlining routine inspections. Internally, the UT278B combines a rechargeable lithium-ion battery pack with real-time power monitoring, so users can trust it will remain powered through long field sessions; recharging is achieved via a standard USB socket when convenient.
Onboard electronics employ fast-filtering algorithms to isolate actual ground resistance readings from stray noise, ensuring that displayed values are stable within one second of measurement. Stored data can be transferred seamlessly to a PC via USB, allowing for straightforward record-keeping and trend analysis. At under 1 kg, the tester balances weight and ruggedness: its reinforced insulation and over-voltage protection safeguard both the operator and the instrument in demanding environments.
Overall, the UT278B presents a refined blend of ergonomic handling and modern display technology to expedite earth resistance diagnostics without added complexity.
Features:
- 2.4-inch color LCD.
- Earth resistance measurement.
- Leakage current measurement.
- Current measurement.
- Grounding voltage measurement.
- Alarm function (visual/audible).
- USB data transfer (stored data upload).
- Built-in rechargeable lithium battery.
Specifications:
| Category |
Specification |
Earth Resistance:
|
0.00 – 1800 Ω (accuracy not specified) |
| Leakage/Current Measurement: |
0.000 A – 50 A (resolution: 1 µA) |
| Grounding Voltage: |
0 – 600 V |
| Display: |
2.4-inch color LCD (46 × 29 mm) |
| Update Rate: |
1 measurement per second |
| Data Storage: |
Up to 500 sets |
| Data Upload: |
USB data transfer to PC |
| Jaw Opening: |
68 mm |
| Weight: |
975 g (with battery) |
| Power Supply: |
Built-in 3.7 V rechargeable lithium battery |
| Charging Interface: |
USB |
| Power Consumption: |
750 mA maximum |
| Operating Temperature: |
–10 °C to 50 °C (< 80% RH) |
| Storage Temperature: |
–10 °C to 60 °C (< 70% RH) |
| Insulation Resistance: |
> 20 MΩ (500 V between circuit and case) |
| Withstand Voltage: |
AC 3700 V RMS (between circuit and case) |
| Magnetic Field Tolerance: |
< 40 A/m |
| Electric Field Tolerance: |
< 1 V/m |
| Safety Standards: |
IEC 61010-1, IEC 61010-031, IEC 61557-1 |
| Category Rating: |
CAT III 300 V, CAT IV 150 V, Pollution Degree 2 |
| Overload Protection: |
Yes |
| Alarm Function: |
Visual and audible |
| Backlight: |
Yes |
| Auto Power Off: |
After 15 minutes of inactivity |
Applications:
- Power Distribution Systems.
- Lightning Protection Systems.
- Industrial Equipment.
- Telecommunication Installations.
- Construction and Facility Maintenance.
- Railway and Transportation Systems.
- Field Service and Diagnostics.
Package Include:
- 4x 1.5 V LR6 (AA) Batteries
- 1x Test Ring
- 1x English User Manual
- 1x Carrying Case (Tool Box)
- 1x Gift Box (Outer Packaging)
UNI-T UT278B Documents:
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