Product Description

UNI-T UT278A Clamp Earth Ground Tester

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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

Features UNI-T UT278A Clamp Earth Ground Tester

Resistance limit alarm
Auto range
Low battery indication

Specifications UNI-T UT278A Clamp Earth Ground Tester

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 Characterisitics
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