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42 www.seektech.com Ridge Tool Company Elyria, Ohio U.S.A
SeekTech SR-60
Glossary -- Definitions
Active Line Tracing
A mode of locating using a Line Transmitter to inject a chosen frequency onto a hidden
conductor; the frequency is then detected by the SR-60 to trace the conductor
Active View Area
The area within the circle in the center of the operating screen, where the Tracing Line
or Sonde Pole and Equator symbols appear.
Bleed over
Coupling of the signal from the target line onto adjacent conductors by any means
(resistive, capacitive, or inductive). Bleed-over makes the signal appear to be coming
from a different conductor than the one being traced by setting up a field of the same
frequency in a nearby conductor.
Checked-Active
Frequencies
A frequency is said to be “Checked-Active” when it has been checked on the main
menu; this enables it to be accessed by the use of the Frequency Key during operation
of the SR-60. The “In Use” frequency is always one of the Checked-Active set.
Clear Signal
A clear signal is a field caused by current through a conductor which is strong enough to
be detected unambiguously by a receiver such as the SR-60. Clear signals depend on
good conductivity, good grounding, and adequate current through the target conductor.
Clipping
The condition of receiving a signal too strong to be processed all at once by the signal
processor; in the SR-60 this condition will cause a warning signal to flash. The signal
peaks are too high and are “clipped” off.
Common Bonding
The use of a connector to ground more than one line through the same ground
connection. Phone lines, for example, are often bonded to ground via the electrical
service ground line. Common bonding can be a cause of ambiguous signals in locating.
Compound Field
An electromagnetic field caused by the combination or two or more fields in proximity to
each other. A compound field has multiple lobes and a complex energy pattern which
can require analysis to interpret correctly when locating.
Coupling
The transfer of energy (without direct electrical contact) between two or more cables or
components of a circuit. This can occur through induction, through common bonding, or
other means.
Crosshairs
A symbol in the center of the Active View Area representing the location of the SR-60,
relative to the detected field.
Current Strength
The calculated level of current based on field strength detected by the Omnidirectional
antennas of the SR-60; expressed approximately in milliamps (mA). An accurate depth
measure is required for accuracy.
Currently Available
Frequencies
Frequencies which have been checked in the Master Frequency Menu are said to be
“Currently Available”; they appear on the Main Menu when the Menu Key is pressed,
and can be set to “Checked-Active” status.
Default
Default values are those settings which the SR-60 uses if the operator does not choose
alternative settings; they can be restored from the Information Menu.
Depth
See “Measured Depth”