DET4TD Megger, DET4TD Datasheet

GROUND RESISTANCE TESTER, 100V, 2000OHM

DET4TD

Manufacturer Part Number
DET4TD
Description
GROUND RESISTANCE TESTER, 100V, 2000OHM
Manufacturer
Megger
Datasheet
1.DET4TD2.pdf (8 pages)

Specifications of DET4TD

Insulation Tester Type
Digital
Insulation Test Resistance
2000ohm
Operating Temperature Range
-15°C To +55°C
External Height
148mm
External Width
203mm
External Depth
78mm
Weight
1kg
Lead Free Status / RoHS Status
na
Lead Free Status / RoHS Status
na
DET4 Series
4-Terminal Earth/Ground Resistance
and Soil Resistivity Testers
DESCRIPTION
Megger’s popular 4-terminal ground testing instrument
family includes four basic models with different kit variants
for each that include select accessories for greater testing
flexibility. The four basic units are:
Model
DET4TD2
DET4TR2
DET4TC2
DET4TCR2
The top-end models (DET4TC2 and DET4TCR2) include
a current measuring function for ART (Attached Rod
Technique) testing capabilities. With this added function,
on-site grounds can be tested separately without having to
remove the utility connection (as explained further in this
document). They also provide stakeless testing capability.
This method allows the operator to use the instrument
like a clamp-on ground tester in applications where that
method is viable, while also being able to operate as a fall
of potential tester if required.
Description
Dry-cell battery powered basic 4-terminal
tester
Rechargeable battery powered basic
4-terminal tester
Dry-cell battery powered 4-terminal tester
with selectable test frequencies, greater
measurement sensitivity and attached rod
technique and stakeless measurement
capability
Rechargeable battery powered 4-terminal
tester with selectable test frequencies,
greater measurement sensitivity and
attached rod technique and stakeless
measurement capability
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The basic kit includes the test leads, stakes, batteries and
calibration certificate, delivered in a tough polypropylene
carry case – everything you need to start testing in one
package.
All models are rated to IP54, making them truly outdoor
instruments. They are designed to meet stringent safety
standards and are rated CAT IV 100 V. The ground testers
have been designed to be easy to use – a large selector
switch makes selection of 2, 3 or 4 pole tests easy with
gloved hands – and the design makes the fitting of shorting
links to perform 2-pole tests a thing of the past. A large,
clear, easy to read LCD and thumb sized test button
also make the instruments particularly well suited to the
outdoor conditions of ground testing. In addition to this
ease of use feature, the instruments automatically check
the connection and conditions of the P spike, C spike,
and also the level of ground noise, indicating the status
on the display. They also include a voltmeter to enable
measurement of ground voltage.
0.01 ohms to 20 kΩ, while the DET4TC2 and DET4TCR2
can measure resistance from 0.01 ohms to 200 kΩ, a key
capability for soil resistivity testing. Also, to allow accurate
testing in noisy environments, the instruments are capable
of rejecting noise up to 40 V peak to peak.
The DET4TD2 and DET4TC2 are powered by eight AA
batteries which are widely available and also give excellent
testing time – the status of these batteries is given by a bar
graph on the LCD display, allowing the operator to decide
when to change the batteries before they expire. The
DET4TR2 and DET4TCR2 are powered from rechargeable
The DET4TD2 and DET4TR2 can measure resistance from
Earth/Ground Resistance & Soil Resistivity Testers
2, 3 and 4 point testing
Stakeless (clamp-on) testing capability
ART (Attached Rod Technique) capability
Multiple, user selectable test frequencies
Resistance measurement range to
200,000 Ω
IP54 rated
Warning indicators prevent test failure
Simple one button operation
Included leads, stakes, calibration
certificate and rugged carry case
DET4 Series

DET4TD Summary of contents

Page 1

... Also, to allow accurate testing in noisy environments, the instruments are capable of rejecting noise peak to peak. The DET4TD2 and DET4TC2 are powered by eight AA batteries which are widely available and also give excellent testing time – the status of these batteries is given by a bar graph on the LCD display, allowing the operator to decide when to change the batteries before they expire ...

Page 2

... Ground testing should be performed both upon installation, to meet design specification, and periodically thereafter in order to maintain service. All Megger models can also perform bonding tests (using an ac signal), to determine that adequate connection has been made from equipment to the grounding system, and can perform soil resistivity tests ...

Page 3

... Stakeless test: DET4TC2 and DET4TCR2 Ground current range (with current measuring clamp): 0 19.9 A Ground current accuracy: 5% ±3 digits Display: DET4TD2 and DET4TR2: 3-1/2 digit high contrast LCD DET4TC2 and DET4TCR2: 3-1/2 digit high contrast LCD, backlit STAKELESS (CLAMP-ON) TESTING The DET4TC2 and DET4TCR2 include stakeless, or clamp-on testing capability. In effect, these models can ...

Page 4

ART (ATTACHED ROD TECHNIQUE) TESTING CAPABILITY The DET4TC2 and DET4TCR2 include the additional testing capability that we have termed ART, for Attached Rod Technique. A nagging problem with traditional ground testing has been the requirement to “lift” (i.e., disconnect) the utility ...

Page 5

... NOTE: Using the ICLAMP allows the operator to make ART measurements. Using the ICLAMP and VCLAMP allows the operator to make stakeless (clamp-on) measurements. Earth/Ground Resistance & Soil Resistivity Testers DET4TD2 DET4TR2 1000-347 1000-324 ...

Page 6

DET4TC2 OPERATION LCD Display 25V / 50V output voltage select button Test button Frequency select button DET4TC2 DISPLAY EXAMPLE Ruptured Output fuse voltage indicator indicator Over/under range indicator Potential probe resistance indicator (OK or high) Earth/Ground Resistance & Soil Resistivity ...

Page 7

Each instrument comes complete with three sets of leads, two test spikes, instruction manual CD, and a rugged carrying case, (current measuring clamp, shown optional accessory for performing the ART testing capability using the DET4TC2 and DET4TCR2 only.) ...

Page 8

... Item (Qty) DET4TD2 DET4TR2 DET4TC2 DET4TC2+Clamps DET4TC2+Kit DET4TCR2 DET4TCR2+Clamps DET4TCR2+Kit See Configuration Options chart for detailed information Optional Accessories Current measuring clamp and connecting lead for ART testing method Voltage inducing clamp, calibration check PCB (two-clamp measurements) and connecting lead Calibration check box ...