UNI-T Digital Clamp Earth Ground Tester UT-278A+ High Precision Digital Display Clamp Earth Ground Testers Auto power off UT278A+

UT270 series can quickly and safely measure the grounding system without disconnecting circuit ground lines or the need of auxiliary electrodes. It can measure resistance from 0.01Ω with a resolution of 0.001Ω. UT275 can also measure leakage current up to 30A. These clamps’ double insulation design makes them durable tools for outdoor work and effective in blocking interference from the environment.

Specifications Range UT278A+
Certifications CE, RoHS
Category ratings CAT III 300V
Earth Ground Resistance (Ω) 0.01~0.099Ω ±(1%+0.01)
0.1~0.99Ω ±(1%+0.01)
1~49.9Ω ±(1%+0.1)
50~99.5Ω ±(1.5%+0.5)
100~199Ω ±(2%+1)
200~395Ω ±(5%+5)
400~590Ω ±(10%+10)
600~800Ω ±(20%+20)
800~1200Ω ±(25%+30)
Leakage current (A) 0mA~9mA ±(2.5%+1mA)
10mA~99mA ±(2.5%+5mA)
100mA~299mA ±(2.5%+10mA)
0.3A~2.99A ±(2.5%+0.1A)
3A~9.9A ±(2.5%+0.3A)
10A~20A ±(2.5%+0.5A)
Display count
EBTN
Jaw opening
32mm
Visual and audible alarm
√
Auto power off
√
Jamming signal recognition
√
Over-range display
√
Data storage
300
Display type
EBTN
Ω+A display
√
General Characteristics
Power 1.5V battery (LR6) x 4
Display 47mm x 28.5mm
Product net weight 1.18kg
Product size 285mm x 85mm x 56mm
Standard accessories Batteries, test ring, English manual
Standard individual packing Gift box, tool box