Milwaukee M12 2580-20, Operator'S Manual

Page: 25 / 110

21
5 Push Cable and Line Locating
5. Push Cable and Line Locating
5.1 Passive Versus Active Locating
Active Passive
Definition
• Active locating always
requires a sonde or
transmitter.
• Active locating is generally
used to trace and pinpoint a
specific buried line
• Used to mark the location of
unidentified buried lines to avoid
them.
• Do not use to identify or trace
specific lines.
Modes
Sonde
Line trace 33kHz & 83kHz
Power: 50/60Hz
Radio: 15 kHz – 27 kHz
Source
• PIPELINE INSPECTION
REELS
• M18™ WIRELESS MONITOR
• PIPELINE INSPECTION APP
• Sondes
• Power* - transmission &
distribution networks
• Radio* - high power, low
frequency (LF) communication
transmitting towers.
When to use
• Use to trace, identify &
pinpoint a buried line.
• When a depth measurement
is required.
• Search for unknown buried lines
when applying a transmitter
signal is not practical.
• For small, localized digging
(planting a fencepost or road
sign).
• A last check before digging.
* Buried pipes and cables act as antennas that re-radiate the signal.
Radio signals travel further distances if both ends of the utility are grounded.
Always
Call Before You Dig
and follow local, state, or national
regulations and your company's safety and work practices.