PeakTech 2670 Bedienungsanleitung Seite 61

Continuity
Low Ohm
mA
Beeper
Zero
(RE)
RE
Zero
Isolation
resistance
Terminal
Voltage
Insulation
Beeper
Lock
Reference
A continuity test is used for checking of intact compounds in a
non-active circuit. If all modules are connected correctly, the
resistance should be as low as possible. When the connections
are corroded, charred or badly screwed, the resistance is higher
(contact resistance), which can ultimately lead to fire. Various
limits (0.5, 1, 2.5 and 10 ) can be set.
The current display of "Continuity" shows the used test current.
The beeper (buzzer) gives an audible signal when the measured
resistance is below the set limit.
The zero function (zeroing) measures the inherent resistance of
the test leads that will be subtracted from the absolute value to
obtain more precise measurement results.
In order to protect an electrical system, it should be properly
connected to the earth ground potential. In the event of a fault
current via the PE grounding can be derived in the ground, which
is important for the bonding or lightning protection. The earth
resistance testing detects the conductivity of the soil, which helps
for the determination of the ground materials used (earth rods,
foundation earth electrode etc.).
The zero function (zeroing) measures the inherent resistance of
the test leads that will be subtracted from the absolute value to
obtain more precise measurement results.
In case of faulty insulation of a live conductor can result in risk of
fire due to leakage or danger to humans and animals through
voltage flashovers. To prevent this, isolation tests are carried out
in the electrical equipment.
The test voltage for the insulation test can be set to 125, 250, 500
or 1000V, and should be selected according to the mains voltage
of the test object.
The beeper (buzzer) gives an audible warning, while the
insulation test is performed.
The insulation test is performed only while the TEST button is
held down. If the LOCK is activated, the test however continues to
be performed by a single button hit, until the TEST button is
pressed again.
The reference value for the insulation measurement can be set to
0.125, 0.25, 0.5 and 1.0 M ohms.
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