Megger DET4 Series Quick Start Manual

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 Description
DET4TD2 Dry-cell battery powered basic 4-terminal
tester
DET4TR2 Rechargeable battery powered basic
4-terminal tester
DET4TC2 Dry-cell battery powered 4-terminal tester
with selectable test frequencies, greater
measurement sensitivity and attached rod
technique and stakeless measurement
capability
DET4TCR2 Rechargeable battery powered 4-terminal
tester with selectable test frequencies,
greater measurement sensitivity and
attached rod technique and stakeless
measurement capability
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.
Earth/Ground Resistance & Soil Resistivity Testers
2, 3 and 4 point testing
n
Stakeless (clamp-on) testing capability
n
ART (Attached Rod Technique) capability
n
Multiple, user selectable test frequencies
n
Resistance measurement range to
n
200,000 Ω
IP54 rated
n
Warning indicators prevent test failure
n
Simple one button operation
n
Included leads, stakes, calibration
n
certificate and rugged carry case
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.
The DET4TD2 and DET4TR2 can measure resistance from
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
DET4 Series