General Description - Megger DET2/2 Guide De L'utilisateur

General Description

The Megger DET2/2
portable instrument designed to measure earth
electrode resistance and perform four terminal
continuity tests. It may also make earth resistance tests
which lead to the measurement of soil resistivity.
Powered by internal rechargeable battery with an
integral charger unit, the instrument design takes full
advantage of microprocessor technology and features
a large, clear liquid crystal display to provide digital
readings. Terminals on the instrument provide an
alternative power source connection to an external 12V
battery, e.g. motor vehicle battery.
Display language can be selected from English,
French, German, Portuguese or Spanish. A range of
frequencies can be selected. DET2/2 is auto ranging,
and will indicate earth resistance in the range - 0,010 Ω
to 19,99 kΩ, with a maximum resolution of 1 mΩ. The
display warns of problems with the test conditions and
also indicates low battery voltage. This enables the
earth spikes to be re-positioned or instrument settings
to be adjusted, to achieve optimum test conditions.
The red TEST push button is pressed to switch the
instrument on, and then turned clockwise to hold it in
the On position. To switch the instrument Off, the TEST
button is turned anti - clockwise and released.
To suit prevailing lighting conditions, the LCD display
4
is a self contained compact can be adjusted by turning the contrast knob.
Four separate membrane switches (marked with ▲ or
▼) control the measurement function and are used to
set the required language and test settings.
Test leads are not supplied with an instrument but form
part of an earth testing field accessory kit which is
available as an option. This kit also includes test spikes
(electrodes) for making temporary earth spikes.
The instrument is housed in a robust and tough case
moulded in ABS plastic. All the controls, the terminals
and the LCD display are mounted on the front panel.
DET2/2 is splash proof, and suitable for outdoor use
in most weather conditions.
Terminal 'C2' ('H') is for the connection to the remote
Current test spike.
Terminal 'P2' ('S') is for the connection to the remote
Potential test spike.
Terminal 'P1' ('ES') is for the Potential connection to
the earth electrode to be tested.
Terminal 'C1' ('E') is for the Current connection to the
earth electrode to be tested.