 The Megger® DET5/4D is fully
automatic, four terminal instruments built into a rugged, water
resistant case giving protection for outdoor use. The instrument is
suitable for the testing of earth electrodes and measuring earth
resistivity.
Operation is started by pushing one of two buttons on the front panel;
one for three terminal measurement and one for four terminal testing.
All other functions of the instrument are completely automatic. The
instrument checks for conditions that may cause an invalid reading
during a test. The low service error and wide operating
temperature range enable accurate results to be achieved
in real on-site conditions. The Megger® DET5/4D and
DET5/4R are fully automatic, four terminal instruments built into a
rugged, water resistant case giving protection for outdoor use. The
instrument is suitable for the testing of earth electrodes and
measuring earth resistivity.
Operation is started by
pushing one of two buttons on the front panel; one for three terminal
measurement and one for four terminal testing. All other functions of
the instrument are completely automatic. The instrument checks for
conditions that may cause an invalid reading
during a test. The low service error and wide operating temperature
range enable accurate results to be achieved in real on-site
conditions.
There are four ranges
covering measurements from 10 m½ to 20 k½. The earth resistance
reading is displayed quickly, accurately and directly on a large,
clear 3.5 digit liquid crystal display. The display indicates when
there is a high test spike resistance and also when the noise
interference is too high to take a valid reading. If the batteries
need replacing or recharging this will also be shown on the display.
Six 1,5 V AA dry cells
provide power for the DET5/4D allowing 600 typical 15 second tests.
The DET5/4R is powered by an internal rechargeable, lead acid battery.
This instrument has a built in battery charger that can operate from a
wide range of mains voltages. The capacity of the lead acid battery
enables 600 typical 15 s tests to be made from one charge.
Each instrument is built into
a small, lightweight case with a handle that has been designed for
outdoor use and has IP54 protection. Four large terminals allow either
spade or hook connectors, 4 mm plugs or bare ended wire to be used for
the test leads. Terminal Shorting bars are provided for continuity
testing or measurement using the ‘dead earth’ method. A removable
cover allows access to the battery compartment in the DET5/4D or to
the charger socket in the DET5/4R.
DET5/4R Data Sheet (PDF) 246kb (documents are in PDF format and will open in a new window) |
