Megger DET2/3 Specifications

DET2/3

Advanced Earth (Ground) Tester

 High resolution of 1 mΩ, ideal for large earth

(ground) systems

 Versatile test modes

 High accuracy for earth (ground) electrode grid and

soil resistivity tests

 Rechargeable battery power that can last all day

with a fast re-charge (up to 10 hours)

 Robust instrument with IP65 protection

 Automatic test frequency selection, with filters

and high current features

 Diagnostic trace display

 Data storage

 Large colour display that shows numeric and

graphical results

DET2/3

Advanced earth (ground) tester

DESCRIPTION

The Megger® DET2/3 automatic earth (ground) test instrument is
robust, compact and designed to measure earth Electrode Resistance
and Soil Resistivity. It provides a full range of test methods and excels
at the four terminal method of measurement, which eliminates the
resistance of the current circuit from the measurement.

The DET2/3 is a reliable instrument for use on large or more complex
earth systems, which include communications earth systems and
difficult test environments. It can be used to test in accordance with
BS 7430 (earthing / grounding), BS-EN-62305 (Lightning Protection),
IEEE Standard 81 and Railway Applications.

Soil Resistivity measurements are used to establish the optimum
electrode design and site, as well as archaeological and geological
investigations.

FEATURES

High accuracy earth

The DET2/3 provides accurate 1 mΩ resolution measurements of
earth (ground) electrode resistance.

With its microprocessor controlled system it provides a flexible and
‘user-friendly’ approach to earth tests by the provision of excellent
error detection capabilities and full test information shown on a large
colour display.

Test frequency, test voltage and filtering can be quickly and easily
adjusted so that adverse conditions, which can influence the test,
can be overcome.

A wide band of test frequencies, with a resolution of 0.5 Hz, can be
used to eliminate errors caused by noise in the earth.

(ground) measurements

The DET2/3 also includes an automatic frequency selection feature
that scans for frequencies with the lowest noise level and then runs

a test at that frequency.

Continuity measurements and bonding

n Single resistance range: One fully automatic range from

0.01 Ω to 1.0 kΩ

n Display: Three digit display

n Accuracy: ±3% (±2 digits)

n Short circuit current: 200 mA continuity test currents

n Lead null: Lead resistance compensation (NULL) operates with

a lead resistance up to 10 Ω

Trace display and data storage

Utilising the latest processors, the DET2/3 can provide a live trace
of its measurements, which graphically shows the amount of noise
from the system under test - a powerful diagnostic tool for the
expert earth (ground) test engineer.

Use of the latest processors and a large internal memory allows
for immediate calculations of resistivity (Wenner or Schlumberger
method) and the ability to save a complete day’s worth of test
results.

Test result data can be
downloaded directly
through a USB flash drive
or straight to a Windows
PC running PowerDB™
software.

DET2/3

Advanced earth (ground) tester

Weatherproof and rugged

The DET2/3 is sealed to IP54 standard, which provides weatherproofing
during operation (case lid open). When the case lid is closed its
protection standard is to IP65 (water and dust damage).

The case is made of a tough and light copolymer polypropylene,
which can withstand the rough and tumble of outdoor use.

Portable power

An internal Li-ion battery provides for a full day of tests.
The Li-ion battery has a fast recharge facility that allows a flat battery
to provide an afternoon of tests, if charged during a lunch break.
The DET2/3 can also operate from a standard 12 V DC battery supply.

SPECIFICATION

2, 3 and 4 pole resistance measurements

Range 0.001 Ω to 20.00 kΩ auto range

Display Four digit display

Accuracy at 23 °C ±2 °C

±0.5% of reading ±2 digits

3P ±10 mΩ

2P ±20 mΩ

Operational uncertainty ±2% of reading, ±2 digits

(meets IEC61557 operational
uncertainty requirement with
readings over 10 mΩ) when
spike resistances are below
100 Ω ±5% of reading
±2 digits ±10 mΩ
(meets IEC61557 operational
uncertainty requirement with
readings over 10 mΩ)

Test standards BS 7430 (Earthing)
BS 62305 (Lightning)
BS EN50122 (Railway)

IEEE Standard 81

Test frequency 10 Hz to 200 Hz in steps of

0.5 Hz

Test current 50 mA max.

Maximum output voltage Less than 50 V rms

Maximum interference Up to 50 V pk to pk

Temperature coefficient < ±0.1% per °C over operating

temp

3 and 4 pole ART (selective) resistance
measurements

Range 0.01 Ω to 10.00 kΩ Auto range

Accuracy ±5% of reading ±3 digits at

23 °C ±2 °C

Stakeless resistance measurement

Range 0.01 Ω to 200 Ω

Accuracy ±7% accuracy, ±3 digits

Leakage current

Range 0.00 A to 2.00 A

Accuracy ±5% (±3 digits)

Instrument specifications

Display 4.3 inch QWVGA, daylight
viewable backlit colour

Operating temperature and humidity

-10 to 40 °C

90% RH max at 40 °C

Storage temperature -20 to 60 °C

IP rating IP54 operational (lid open),
IP65 storage (lid closed)

Measurement rating CAT IV 300 V

Power supply Internal Li-ion battery or

external 12-18 V, 65 W, DC supply

Battery life Up to 10 hrs use

Battery charging time Fast recharge to 50%,

3 hrs for 100%

Safety Meets IEC 61010

EMC Meets IEC 61326

Dimensions L 315 x W 285 x H 181 mm

(12.4 x 11.2 x 7.1 in)

Weight 4.5 kg (9.9 lb)

Data download To PC through USB 2.0

Data storage On board 500 record storage

downloadable as *.txt

USB type A Data download to USB drive

USB type B Data download to PC

Secondary measurement display
Noise, voltage and current
Resistivity calculation Wenner: PE = 2 π a R

Schlumberger:
PE = π b (b+a) R

a

Test modes Internally set 2P, 3P,
ART (Selective), 4P,
Stakeless (clamp) modes

Aux inputs MCC1010, MVC1010

RoHS compliant Yes

W

ACCESSORIES

MCC1010 and MVC1010

n For Stakeless tests

n For ART tests

Cable reels with spike

n Sturdy handle and a smooth unwind and wind action
n Cable ‘feed through’
n 20 m, 30 m, 50 m, 60 m or 100 m cables
n Attachable 25 cm (10”) earth spike
n Spike can be hammered into the ground
n Unique daisy-chain feature to create longer lengths

Continuity test cables and clips

n 1.4 m cables
n 2 wire connection cable
n Crocodile clips
n Probes

Accessories bag

n Holds a full suite of accessories
n Water resistant
n Toughened bottom for outdoor use

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