The AEMC 4620 Digital Ground Resistance Tester performs ground
resistance and soil resistivity tests. This direct reading tester
measures from 0 to 2000Ω, and is autoranging, so that it can
automatically seek out the optimum measurement range.
Easy-to-use
— simply connect the leads, Press-to-Measure and read the results. The
large LCD (nearly 3/4" high characters) is easy-to-read, and also
indicates low battery status, overrange and test lead shorts and lead
reversals. Three LED indicators on the front panel continuously warn
the user of measurement problems to ensure accurate and reliable tests.
The
AEMC 4620 Digital Ground Resistance Tester is fuse protected up to
250VAC against accidental connection to live circuits. In the event of
a system fault, it can withstand 250VAC with spikes of 3000VAC or
1000VDC.
The heavy-duty field case is sealed against dust and
water when closed. The meter itself is self-contained within an inner
case providing additional environmental and insulation protection. The
test button is also sealed against the elements.
This tester is
powered by eight, C cell batteries and will perform over 2000 - 15
second tests between battery replacement. The AEMC 4620 Ground
Resistance Tester is a rugged, easy-to-use instrument ideal for
maintenance crews performing numerous tests. The AEMC 4620 exceeds
mechanical and safety specifications for shock, vibration and drop
tests called out in IEC standards. Designed to reject high levels of
interference, so it can be used under difficult conditions such as high
stray currents that normally affect accuracy.
Applications:
Three-Point measurements
of resistance to ground of ground rods and grids. Three-Point
measurements are generally used when the electrode or grid can be
easily disconnected, if corrosion is suspected, or in circumstances
where ground faults are unlikely to occur
Four-Point tests or soil resistivity measurements. Locating areas of lowest soil resistivity is essential for achieving an economical grounding installation
Touch potential measurements,
an alternative to 3-Point tests in evaluating electrical safety. This
test is recommended when the ground cannot be disconnected, where
ground faults are highly likely to occur, or when the "footprint" of
grounded equipment is comparable to the size of the ground to be tested.
Two-Point tests
for continuity tests on bonding or on pre-established grounds. This
test is commonly performed in urban environments where proper auxiliary
electrode placement may be obscured by confined real estate.
Measurements are referenced against a good local ground conductor.
Purchase the AEMC 4620 as a standalone unit or with the available kits below: