The Megger DET4TCR2 four-terminal ground resistance tester with
clamps measures earth ground resistance, soil resistivity, and
ground voltage to evaluate the safety and integrity of electrical
systems. The tester offers a choice of 2-, 3-, or 4- pole ground
resistance testing. It can take measurements using the attached
rod technique (ART), which tests on-site grounds without
requiring the utility connection to be disconnected. It comes
with a current clamp for measuring conductor current and
electrode resistance and a voltage clamp for stakeless ground
measurements, and when used with ART capability, the clamps can
be used for taking fall of potential measurements. The clamps
have two jaws that can accommodate a conductor up to 2.1" (52 mm)
in diameter. The tester has a maximum resistance input of 200,000
ohms for testing the resistivity of a range of soil types. The
tester's voltmeter displays the ground voltage during use, which
helps increase operator safety. The operator can choose between
25V or 50V test voltage output, allowing the tester to be used in
agricultural applications. For accurate readings in noisy
environments, the tester can filter out ground voltage noise up
to 40 volts (V) peak-to-peak. The DET4TCR2 comes with one 49' (15
m), two 33' (10 m), and one 10' (3 m) test leads, four ground
stakes, four right-angle terminal adaptors, a field calibrator
for measurement accuracy, and one voltage and one potential
clamp. The tester's liquid crystal display (LCD) is backlit for
readability in low light.
The DET4TCR2 meets International Electrotechnical Commission
(IEC) safety standard 61010 and is certified for category IV
installations up to 100V, which covers measurements at the source
of the low-voltage supply, such as electricity meters and
overcurrent protection devices. The tester comes in a hard
polypropylene case for transport and storage. The case has an
ingress protection rating of IP54, meaning it protects against
the ingress of dust and splashing water, making it suitable for
outdoor use. The DET4TCR2 operates on eight rechargeable 1.5V
nickel-metal-hydride (NiMH) AA batteries (included). It has a
built-in battery charger and comes with an AC/DC adapter for
charging. A low-battery indicator signals when the batteries need
to be charged.
Specifications
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Maximum ground resistance input200,000 ohmsMaximum ground voltage
input100 volts (V)Maximum ground current input19.9 ampStandards
metInternational Electrotechnical Commission (IEC)/European
Standards (EN) 61010-1, EN61557, Keuring Electrotechnisch
Materieel Arnhem (KEMA) K85B, European Conformity (CE) marked,
C-tick markedPower supply1.5V NiMH AA batteries (eight,
included)Current clamp weight1.2 lb./0.5kgVoltage clamp weight1.2
lb./0.5kgMeter weight2.2 lb./1 kgCurrent clamp dimensions4.4 x
8.5 x 1.8 inches/111 x 216 x 45 mm (H x W x D)Voltage clamp
dimensions4.4 x 8.5 x 1.8 inches/111 x 216 x 45 mm (H x W x
D)Meter dimensions8.0 x 5.7 x 3.2 inches/203 x 148 x 78 mm (H x W
x D)
H is height, the vertical distance from the lowest to highest
point; W is width, the horizontal distance from left to right; D
is depth, the horizontal distance from front to back.
Electrical test meters report electrical circuit properties, such
as voltage, resistance, capacitance, and continuity. Available in
handheld or benchtop form, they detect electrical problems in
equipment, wiring, and power supplies. A variety of probes,
clamps, and leads can be used to connect the meter to a circuit
or device. Single-function meters, such as battery testers and
voltage testers, measure one property of a circuit, and
multimeters measure multiple properties. Electrical test meters
display information either in analog form using a needle that
moves on a calibrated scale, or in digital form using digits or a
graphic representation on an LED screen. Meters have electrical
properties that are to be measured and the anticipated range of
results, and should have a rating that is higher than the maximum
value of the anticipated range. An electrical test meter has
multiple settings corresponding to potential ranges of values for
the properties it can measure. A manual ranging meter requires
the operator to flip through different settings until the correct
range is reached. An autoranging meter cycles through range
settings automatically until it reaches the correct range.
Megger manufactures equipment for cable fault locating,
protective relay testing, telecommunications and data integrity,
and power quality testing under multiple brand names, among them
Megger, Biddle, States, and AVO. The company, founded in 1889, is
headquartered in Dover, England, and meets International
Organization for Standardization (ISO) 9001:2008 standards.
What’s in the Box?
* DET4TCR2 four-terminal ground resistance tester
* (1) current clamp
* (1) voltage clamp
* (1) 49' (15 m) test lead
* (2) 33' (10 m) test lead
* (1) 10' (3 m) test leads
* (4) ground stakes
* (4) right-angle terminal adaptors
* (1) field calibrator
* (8) 1.5V NiMH AA batteries
* (1) AC/DC power adaptor
* Calibration certificate
* Instruction CD
* (1) Polypropylene carrying-case
- Ground resistance tester measures earth ground resistance, soil resistivity, and ground voltage to evaluate electrical system safety.
- Choice of 2-, 3-, or 4- pole ground resistance testing.
- Attached rod technique (ART) capability tests on-site grounds without requiring the utility connection to be disconnected, and can be used for fall-of-potential measurements.
- Comes with a current clamp for measuring conductor current and electrode resistance and a voltage clamp for stakeless ground measurements.
- Meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for category IV installations up to 100V.