UNI-T UT278A CLAMP EARTH GROUND TESTERS

UNI-T UT278A Clamp Earth Ground Testers

The UNI-T UT278A Clamp Earth Ground Tester is designed for professionals who need quick, accurate, and convenient ground resistance measurements. In addition, it provides a resistance limit alarm, allowing users to instantly identify when measurements exceed the preset safety threshold.

Moreover, this tester features an auto range function, which automatically selects the most suitable range for accurate readings without manual adjustment. As a result, users save time and reduce the risk of errors during testing.

Furthermore, the UT278A includes a low battery indication, ensuring that you are always aware when the power level is running low. Therefore, you can avoid unexpected downtime and maintain uninterrupted operation in the field.

With these features combined, the UNI-T UT278A Clamp Earth Ground Tester offers reliability, ease of use, and enhanced efficiency, making it an essential tool for electricians, engineers, and maintenance professionals.

  • Resistance limit alarm for immediate safety alerts.

  • Auto range for fast and precise measurement selection.

  • Low battery indication to prevent unexpected power loss.

Specifications of UNI-T UT278A Clamp Earth Ground Testers

Specifications

Range UT276A UT278A

Earth Ground Resistance (Ω)

0.01~0.099Ω ±(1%+0.01) ±(1%+0.01)
0.1~0.99Ω ±(1%+0.01) ±(1%+0.01)
1~49.9Ω ±(1%+0.1) ±(1%+0.1)
50~99.5Ω ±(2%+0.5) ±(2%+0.5)
100~199Ω ±(3%+1) ±(3%+1)
200~395Ω ±(6%+5) ±(6%+5)
400~590Ω ±(10%+10) ±(10%+10)
600~800Ω ±(20%+20) ±(20%+20)
600~1000Ω
800~1200Ω ±(25%+30) ±(25%+30)

Leakage current (A)

0mA~9mA ±(2.5%+1mA)
10mA~99mA ±(2.5%+5mA)
100mA~299mA ±(2.5%+10mA)
0mA~299mA
0.3A~2.99A ±(2.5%+0.1A)
3A~9.9A ±(2.5%+0.3A)
10A~20A ±(2.5%+0.5A)
3A~30A ±(2.5%+0.5A)

Features

Display count

4 digits LCD display

Jaw opening

32mm 32mm

Resistance measurement

>1kHz

frequency

Single measurement time

1 second

Current limit alarm

1mA~499mA

Current measurement

50Hz/60Hz

frequency

Auto power off

RS-232

Visual and audible alarm

Jamming signal recognition

Over-range display

Data storage

99 99

General Characteristics

Power

1.5V battery (LR6) x 4

Display

47mm x 28.5mm

Product color

Red and grey

Product net weight

1160g

Product size

285mm x 85mm x 56mm

Standard accessories

Batteries, test ring, tool box

Standard individual packing

Gift box, English manual

Standard quantity per carton

6pcs

Standard carton measurement

610mm x 375mm x 320mm

Standard carton gross weight

18kg

Optional accessories

RS-232 interface cable, PC software CD