UNI-T UT278A Clamp Earth Ground Tester ,Measure Resistance from 0.01Ω with a Resolution of 0.001Ω UT-278A

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 signals from the environment.

Applications:
Grounding resistance measurement in electricity, telecommunication, meteorology, oilfield, architecture and industrial electric equipment

Specifications Range UT278A
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 ±(2%+0.5)
100~199Ω ±(3%+1)
200~395Ω ±(6%+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)
3A~30A ±(2.5%+0.5A)
Features
Display count 4 digits LCD display
Jaw opening 32mm
Resistance measurement
frequency ＞1kHz √
Single measurement time 1 second √
Current limit alarm 1mA~499mA √
Current measurement
frequency 50Hz/60Hz √
Auto power off
RS-232 √
Visual and audible alarm √
Jamming signal recognition √
Over-range display √
Data storage 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