Vivax Metrotech vLocDM, User Handbook Manual

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Glossary
11 Glossary
Active Locate
Active Signal
Attenuation
Compass
Display
Line
Null
Pinpoint
A locate where a transmitter is used to apply a signal to a buried pipe or cable, the position
of which is then located by a receiver tuned to the same frequency.
A signal applied by the locator transmitter to a buried line. Typical this is a very precise
frequency.
The reduction of an electromagnetic signal from a pipe or cable.
An accessory used to apply the transmitter signal to an insulated line, removing the need to
connect the transmitter signal directly to a conductor or cable sheath.
Line direction indicator. (Although visually like a compass, this is the only relation to a
compass.)
The act of signals transferring to lines to which they were not originally applied. Coupling
can be “direct” where the target line has an electrical connection to another line, or “induced”
where the signal radiates from the target line to another line or lines.
The information visually available on the dot matrix display.
A generic term for any buried pipe or cable.
A minimum response to a buried line.
A locate where the receiver searches for a wide range of signals that radiate from buried
pipes or cables. These signals come from a variety of sources in the environment and
couple to the buried (& overhead) lines. Typical examples 50/60Hz and LF/VLF radio.
A wide range of signals that radiate from buried pipes or cables. These signals come from
a variety of sources in the environment and couple to the buried (& overhead) lines. Typical
examples 50/60Hz and LF/VLF radio.
A maximum response to a buried line.
Using a receiver to identify the exact position of a buried line.
The indication that the receiver gives which is caused by the signals it is receiving. This
can be visual, audio or both. Typically it is displayed on the locators dot matrix display and
audibly from a loudspeaker in the receiver housing.
This describes the act of looking for a buried line within a given area.
Clamp
(or Coupler)
Coupling
Passive Locate
Passive Signals
Peak
Response
Search (sweep)