LKZ-1500-
LITE ● LKZ-1500 – USER MANUAL
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3.4.2.5 Voltage output limitation
Mode of voltage output limitation to 30 V is activated for safety reasons during operations. For ex-
ample, it is reasonable to limit voltage output level during cable cord selection in case of body contact
with a cord.
To activate voltage output limitation, hold down the button
and press
(pos. 3 in
). On the display you will see indicator “V” flashing . In case the transmitter cannot provide pre-
set power, it is automatically limited to maximum possible value at the given load.
To deactivate voltage output limitation, hold down the button
and press
(pos. 4 in
3.4.3
Non-contact survey current generation in communication line
If the transmitter cannot be directly connected to communication line in galvanic mode, for exam-
ple, no access to conductive parts of communication lines or they carry voltage, the survey current
can be generated in the examined lines from induction coil or by inductive clamps.
3.4.3.1 Internal transmitter inductor
The transmitter with coil produces alternating magnetic field in the ground that generates current
in the line of communication. The higher is survey current, the lower is resistance of the closed circuit
being a part of communication line. Earthing of communication line ends is the best decision as
shown in
. If there are no earth conductors, the survey current level is lower as its strength is de-
termined by capacitive current through line insulation. The current level is being higher with a rise in
frequency.
During operation in inductive mode transmitter shall be installed vertically along an axis of the ex-
amined communication line (
).
Fig. 5 Induction current excitation in the localized object
For operation from internal inductor press the button
. Symbol
will be displayed. The
inductor reaches its maximum performance at 33 kHz.
Summary of Contents for LKZ-1500
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