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DIGITAL EARTH TESTER
M
DET62D
User Guide
Guide de l’utilisateur
Gebrauchsanleitung
Guía del usuario
NOTE
THE INSTRUMENT MUST ONLY BE USED BY TRAINED AND COMPETENT PERSONS.
GENERAL DESCRIPTION.
The Megger DET62D Digital Earth Tester is a compact portable instrument designed to
measure earth electrode resistance quickly and accurately. Powered by six LR6 battery
cells, the instrument is very robust and has a tough case moulded in ABS plastic.
The instrument uses the three-terminal method of measurement in which the '
X' terminal
is connected to the earth electrode under test, and the 'C' and 'P' terminals are connected
to Current and Potential test spikes. Test frequency is 128 Hz to avoid problems from electrical
mains ‘Noise’.
Test leads and auxiliary electrode test spikes can be supplied as part of an earth testing
field accessory kit which is available as an option.
SAFETY WARNINGS
• Warnings and precautions must be read and
understood
before the instrument is
used. They must be observed during use.
• The earth spikes, test leads and their
terminations
must not be touched if an
installation earth-fault can arise, unless
adequate precautions are taken.
• The DET62D must be disconnected while
its battery cells are changed. Replacement
fuses
must be of the correct type and rating.
• Special precautions are necessary when
‘live’ earths may be encountered. Isolation
switches and fuses are needed in this
situation.
• When working near high tension systems,
rubber gloves and shoes should be worn.
DET62D FEATURES
CIRCUIT CONDITION WARNING INDICATORS
IF ANY OF THE WARNING INDICATION LEDS ARE ILLUMINATED, A WARNING ALERT ARROW IS DISPLAYED .
HIGH CURRENT SPIKE RESISTANCE (Rc)
During a test, if the resistance of the Current circuit is too high for accurate measurement, the Rc LED automatically
illuminates. This may be caused by an open circuit, poor test lead connections, or excessive resistance of the soil near the
electrode under test and / or the remote Current spike. Whatever the cause of the symbols appearance, it should be
cleared before a test can be regarded as valid. Moistening the soil around the Current spike; re-siting the spike in a new
position or using more than one spike may solve the problem.
HIGH POTENTIAL SPIKE RESISTANCE (Rp)
If the resistance of the Potential circuit is too high for an accurate measurement, the Rp LED automatically illuminates. This
may be caused by an open circuit, poor test lead connections, or excessive resistance of the soil near the electrode under
test and / or the remote Voltage spike. Whatever the cause of the symbols appearance, it should be cleared before a test
can be regarded as valid. Moistening the soil around the Voltage spike; re-siting the spike in a new position or using more
than one spike may solve the problem.
EXCESSIVE NOISE INTERFERENCE (NOISE / BRUIT)
During a test, if the interference voltage in the earth being measured is beyond the level that can be rejected by the
Instrument, the 'NOISE' LED will illuminate. Valid measurements cannot be made in this condition, and the solution may be
to wait until the interference has subsided. Alternatively, choose a new position for the two remote test spikes, by re-siting
them at right angles to their first position; still in a straight line, and try again.
X
P
C
ESH
EARTH
TESTER
R
D
The 3
1
⁄2 digit liquid crystal display
shows all test resistance results
directly in Ω or kΩ, with the
decimal point automatically
positioned
Warning LEDs (accompanied with Warning Alert
arrow) indicate any excessive resistance in the
Current circuit, or the Potential circuit (both usually
caused by a high test spike resistance) and any
excessively "Noisy" earth environment
Single push button operation.
All other functions are automatic
Low
battery
voltage
indicator
If the resistance under test exceeds 2 kΩ,
an over-range symbol appears (‘1’ as left
hand digit, with a decimal point)
Battery compartment
cover
Range
indicators
Electrode under
test terminal
Potential test
spike terminal
Current test
spike terminal
Case
protected
to IP54
Warning Alert arrow
Produktspecifikationer
| Varumärke: | Megger |
| Kategori: | mätning |
| Modell: | DET62D |
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