The AEMC Digital Ground Resistance Tester performs grounding
resistance, soil resistivity, bonding tests (2- and 4-wire Resistance)
and earth coupling measurements. This direct reading tester measures
from 0.01 to 99.99kΩ, and is auto-ranging, automatically seeking out
the optimum measurement range test current and test frequency.
Easy-to-use — simply connect the leads, select the test mode,
Press-to-Measure and read the results. Up to 512 test results can be
stored in internal memory for later recall to the display or download
to a PC for analysis and hard copy reports.
The large LCD is easy-to-read and indicates grounding electrode
resistance, test voltage, current and frequency. It also measures
individual test electrode resistance, battery status and more depending
on the measurement.
The
AEMC 6470-B is Cat IV rated to 50V and is over voltage protected to
greater than 250V against accidental connection to live circuits. Live
voltage, if present, is also displayed on screen. In the event of a
system fault, it can withstand 250V between any two terminals. Also
included, are manual and automatic test frequency selection from
40 to 513Hz; user selectable Soil Resistivity test method (Wenner or
Schlumberger); user selectable 2-Wire or 4-Wire Bond Resistance test
and a Earth coupling test feature.
Additional features of the AEMC 6470-B Digital Ground Resistance Tester
include: a heavy-duty field case sealed against dust and water when
closed (the test button is also sealed against the elements); NiMH
rechargeable batteries. An external charger powered from 120V/230V
50/60Hz is included. Also can be powered and charged from a 12V vehicle
battery. Testing while recharging is allowed.
The AEMC 6470-B is rugged, easy-to-use and ideal for maintenance crews
and contractors performing numerous tests. It exceeds mechanical and
safety specifications for shock, vibration and drop tests called out in
IEC standards. The adjustable test frequency and filtering provide for
rejection of high levels of interference, allowing it to be used under
difficult conditions such as the presence of high stray currents that
normally affect accuracy, and measured auxiliary rod resistance enables
the user to optimize measurements in difficult soil environments.
Applications:
3-Point measurements
of resistance to ground of ground rods and grids. 3-Point measurements
are generally used when the electrode or grid can be easily
disconnected.
4-Point tests or soil resistivity measurements. Locating areas of lowest soil resistivity is essential for achieving an economical grounding installation.
Touch and step potential testing measurements.
These tests are recommended when the ground cannot be disconnected,
where ground faults are highly likely to occur, or when the "footprint"
of grounded equipment (the outline of the part of equipment in contact
with the earth) is comparable to the size of the ground to be tested.
2- or 4-Wire tests for continuity tests
on bonding or on grounding systems. This test is a DC resistive test
using 250mA or more and is used to check bonding of all connection
points on the ground system.
Earth coupling measurement and display. Used to estimate the influence of two earth resistance systems that are not connected to each other.
Purchase the AEMC 6470-B as a standalone unit or with the available kits below: