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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.
Specifications | Range | Best Accuracy |
Model | UT278A | |
Earth Ground Resistance (Ω) | 0.01Ω-0.099Ω | ±(1%+0.01) |
| 0.1Ω-0.99Ω | ±(1%+0.01) |
| 1.0Ω-49.9Ω | ±(1%+0.1) |
| 50Ω-99.5Ω | ±(2%+0.5) |
| 100Ω-199Ω | ±(3%+1) |
| 200Ω-395Ω | ±(6%+5) |
| 400Ω-590Ω | ±(10%+10) |
| 600Ω-800Ω | ±(20%+20) |
| 800Ω-1200Ω | ±(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) |
Features | ||
Display Count | 4 Digits Display LCD | √ |
Auto Range | √ | |
Jaw Capacity | 32mm | |
Single Measure Time | 1 Second | √ |
Resistance Measurement Frequency | >1KHz | √ |
Current Measurement Frequency | 50Hz/60Hz | √ |
Resistance Limit Alarm | 1Ω-199Ω | √ |
Current Limit Alarm | 1mA-499mA | √ |
Beeper and Light Alarm | √ | |
Jamming Signal Recognition | √ | |
Over-Range Display | √ | |
Low Battery Indication | √ | |
Data Logging | 99 | |
Accessories:
Batteries,
Test Ring,
Tool Box
HUAZHENG Electric Manufacturing (Baoding) Co., Ltd is established in year of 2008, located at Baoding city, Hebei province, China. It is a professional company specializing in the development and production of electric power testing equipment. Main Product: transformer oil test series, high voltage test series, cable fault location system, microcomputer relay protection test set, etc. All of our products comply with international quality standard and obtained CE and ISO 9001 certificate. Heibei Huanhai Import & Export Trading Co.,Ltd is a trading company established by Huanhai Electric.
We insist on customer orientation and provide you with high quality products, reasonable prices, timely delivery and efficient service. We are willing to work with global clients for joint development and create value and success for our customers continuously.

We have our own manufacturing factory,pls see the below certificate,we are the direct supplier.
We are a new enterprise engaged in development,produce & sale a serious of power system products, such as Cable fault tester, transformer test class, lightning arrester test class, comprehensive test class.