Uni-t Ut278A Earth Ground Resistance Tester Clamp Meter
UT270 series clamp earth resistance tester is widely used in electric power, telecommunications, meteorology, oil field, construction and industrial electrical equipment, such as the ground resistance measurement, loop resistance measurement. In the measurement of the grounding system with a loop, it is not necessary to disconnect the ground from the assembly line, without the need of auxiliary electrode, safe and fast.
UT278A series clamp grounding resistance instrument with long jaw and round jaw points, long jaw, especially suitable for the flat ground.
| Earth Ground Resistance Clamp Meter Specifications | Range | Best Accuracy | |
| Model | UT276A | UT278A | |
| Earth Ground Resistance (Ω) | 0.01Ω-0.099Ω | ±(1%+0.01) | ±(1%+0.01) |
| 0.1Ω-0.99Ω | ±(1%+0.01) | ±(1%+0.01) | |
| 1.0Ω-49.9Ω | ±(1%+0.1) | ±(1%+0.1) | |
| 50Ω-99.5Ω | ±(2%+0.5) | ±(2%+0.5) | |
| 100Ω-199Ω | ±(3%+1) | ±(3%+1) | |
| 200Ω-395Ω | ±(6%+5) | ±(6%+5) | |
| 400Ω-590Ω | ±(10%+10) | ±(10%+10) | |
| 600Ω-800Ω | ±(20%+20) | ±(20%+20) | |
| 800Ω-1200Ω | ±(25%+30) | ±(25%+30) | |
| Leakage Current(A) | 0mA-9mA |
| ±(2.5%+1) |
| 10mA-99mA |
| ±(2.5%+5) | |
| 100mA-299mA |
| ±(2.5%+10) | |
| 0.30A-2.99A |
| ±(2.5%+0.1) | |
| 3.0A-9.9A |
| ±(2.5%+0.3) | |
| 10.0A-20.0A |
| ±(2.5%+0.5) | |
| 3A-30A |
| ±(2.5%+0.5) | |
| Display Count | 4 Digits Display LCD | Yes | Yes |
| Jaw Capacity |
| 32mm | 32mm |
| Single Measure Time | 1 Second | Yes | Yes |
| Resistance Measurement Frequency | >1KHz | Yes | Yes |
| Current Measurement Frequency | 50Hz/60Hz | Yes | Yes |
| Resistance Limit Alarm | 1Ω-199Ω | Yes | Yes |
| Current Limit Alarm | 1mA-499mA |
| Yes |
| RS-232 |
| Yes |
|
| Beeper and Light Alarm |
| Yes | Yes |
| Jamming Signal Recognition |
| Yes | Yes |
| Over-Range Display |
| Yes | Yes |
| Low Battery Indication |
| Yes | Yes |
| Data Logging |
| 99 | 99 |
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