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I．Introduction
ETCR3000 Digital Earth Resistance Tester is specially designed
and manufactured for field measurement, adopting the latest digital
and micro-processing technology, 3-pole or 2-pole method for
earth resistance measurement, with a unique function of wire
resistance verification, anti-interference capability and the ability to
adapt to the environment, to ensure high precision, high stability
and reliability for prolonged measure, which is widely used in
electric power, telecommunications, meteorology, oil field,
construction, lightning protection, industrial electrical equipment
and other earth ground resistance measurement.
ETCR3000 Digital Earth Resistance Tester has a unique
function of wire resistance verification ， more accurate on
measuring on-site low value earth ground resistance, which can
avoid error caused by resistance change due to prolonged usage
of testing wire; avoid error caused by testing wire that is failed to be
fully inserted into tester interface or by poor contact; avoid error
caused by users’ replacing or lengthening testing wires.
ETCR3000 Digital Earth Resistance Tester is composed of
host machine, monitoring software, testing wires, communication
wires and others. The large LCD display of host machine is with
blue backlight and bar graph indicating that can be seen clearly. At
the same time it can store 400 sets of data, fulfilling historical
inquiry and online real-time monitoring through monitoring
software, dynamic display, with the maximum, minimum, and
mean indicators, with alarm settings and alarm indicator, and with
the functions like historical data access, reading, preservation,
report forms, printing and so on.
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