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This product has been discontinued. Replaced by UT276A+/UT278A+ .

UT276A/UT278A Clamp Earth Ground Testers (Discontinued)

UT276A/UT278A 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. These clamps’ double insulation design makes them durable tools for outdoor work and effective in blocking interference signals from the environment.


Models: UT276A, UT278A


Features of UT276A/UT278A Clamp Earth Ground Testers

Certificates: CE, RoHS

● Resistance limit alarm

● Auto range
● Low battery indication

Specifications of UT276A/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)
800~1200Ω ±(25%+30) ±(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)
Display count 4 digits LCD display
Jaw opening 32mm 32mm
Resistance measurement >1kHz
Single measurement time 1 second
Current limit alarm 1mA~499mA
Current measurement 50Hz/60Hz
Auto power off
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

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