Wireless Data Communication, Where Applicable - Leica DD120 Series User Manual

3.6
Bluetooth
22
Search Mode
Signal Transmitter
mode
Sonde
WARNING
Presence of utilities without a detectable signal
The absence of a positive indication does not guarantee the non-existence of
a utility.
Without the use of appropriate accessories, the locators cannot locate non-
metallic utilities such as plastic pipes, typically used by the water and gas
utilities.
Precautions:
▶ Always excavate with care.

Wireless Data Communication, where applicable

Bluetooth status is indicated on the Locators display, the Bluetooth symbol
will be illuminated on all locators with Bluetooth connectivity. Data can be
wirelessly transferred from a Bluetooth enabled Locator to a suitable data log-
ging device, enabling the operator to capture information about the Locator's
status and the service depth.
Description
Used in conjunction with a signal transmitter:
To improve the detectability of utilities.
•
To trace a specific utility.
•
To make a depth or current measurement.
•
☞
Keep in mind the following:
Higher frequencies couple onto utilities more
•
easily than lower frequencies.
Higher frequencies travel shorter distances; the
•
higher the frequency the less the distance trav-
elled.
Higher frequencies are likely to couple onto
•
other utilities; the higher the frequency the
greater the spread.
Higher frequencies are useful for avoidance
•
activities.
Example:
A 33 kHz frequency has a greater ability to couple
onto other utilities.
Used in conjunction with a sonde:
To trace the route of a pipe or duct, including
•
non-metallic variants.
To locate a blockage or collapse.
•
To make a depth measurement.
•
☞
Keep in mind that various sondes are
available for specific task-based applica-
tions:
Sondes with higher frequencies are used for
•
generic pipe or duct tracing.
Lower frequencies (512 Hz, 640 Hz) work best
•
for metal pipes.
Operation of the Locator