UNI-T UT278A+ clamp meter
Details
The UNI-T UT278A+ is part of the UT270+ series of clamp meters. It can quickly and safely measure the grounding system without disconnecting circuit ground lines or the need for additional probes. It can measure ground resistance up to 1200Ω with a resolution of 0.001Ω, while also being able to measure leakage current with a resolution of 0.01mA. Unique to the UT278A+ model in this series is that it can show both the measured resistance and current on the same display.
The jaw opening of the clamp is 55 x 32 mm. Its memory is capable of storing up to 300 groups of data and it has a measuring time of 2/s. Instead of a regular reflective LCD display, it uses EBTN (Enhanced Black Twisted Nematic) technology, which features a very dark background with low light leakage. The resulting super high contrast gives the display a far better viewing angle and clarity.
The double insulation of the product makes it highly durable, suitable for outdoor work and effective in blocking interference from the environment. The auto-off function ensures the battery is not being drained needlessly.
Specifications
| Leakage current range | 0 - 20 A |
| Leakage current resolution | 0.01 mA |
| Resistance range | 0.01 - 1200 Ω | Resistance resolution | 0.001 Ω | Clamp size | 55 x 32 mm |
| Display backlight | No |
| Other functions | Auto range, data hold, data access, visual/audible alarm setting, auto-off, jamming signal recognition |
| Display | 4-digit, 46 x 29 mm, EBTN |
| Power supply | 4x 1.5 V batteries |
| Weight | 1.18 kg |
| Dimensions | 285 x 85 x 56 mm |
Accessories
The UT278A+ comes by default with:
- 4x 1.5V battery
- Test ring
- Carrying case
Pros and cons
- Earth ground resistance and leakage current testing in one device
- EBTN display
- No external interfaces
Downloads
| UNI-T UT270+ series datasheet |  (277.54 KB) | Download |
| UNI-T UT276+ UT278+ user manual | (5.25 MB) | Download |
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