The
AEMC 4630 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 4630
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.
The AEMC 4630 is powered by 9.6V, 3.5 Ah NiMH rechargeable batteries. A
built-in recharge circuit, powered from 120/230V 50/60Hz line, also
provides
for testing while recharging and will perform over 2000 15 second tests between recharging.
The AEMC 4630 Ground Resistance Tester is
a rugged, easy-to-use instrument ideal for maintenance crews performing
numerous tests. The AEMC 4630 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.
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 4630 as a standalone unit or with the available kits below: