SeekTech
In general, directly connected Active Line Tracing is more reliable than Passive Line Tracing.
WARNING
In Passive Line tracing, or when signals are extremely weak, the Measured Depth will generally read too deep, and the actual buried depth may be much shallower.
OmniSeek Locating
The 
is a universal passive search mode that can simultaneously detect frequencies in three passive search bands (<4 kHz, 
will be displayed. This enables you to sweep an area without having to switch between frequency bands.
To use OmniSeek, select it from the Main Menu:
Figure 30: Selecting 
OmniSeek
The 
on the screen indicates the other filters are also running. If a closer proximity is detected from another frequency band, the displayed frequency value will shift to that band.
Figure 31: OmniSeek with Secondary Tracing Line
The display will show the main tracing line and identify the band in which it is found. In Figure 31, the <4 kHz band is being displayed as the closest signal being seen by the locator. Notice there is also a dashed secondary tracing line being shown. If signals are also being detected from other frequency bands, dashed lines (called Secondary Trace Lines) will indicate their apparent location.
Figure 32: 
OmniSeek 15-35kHz Band
In Figure 32, the Tracing Line, in the<4 kHz band, is showing some distortion. Two other signals are being detected in the bands
This enables you to do a Passive Locate more effectively if there is, for example, a lot of 60 Hz noise in the environment. It is important to keep in mind that what you are seeing are traces of signals from the various broadband frequencies. The operator has to use the data to develop an understanding of what he is seeing. If one or two secondary tracing lines are showing out of alignment with the main tracing line, this can be an indication of another utility, especially if it is at a deeper depth. But it can also be due to simple signal energy on the same utility in different frequency bands. Often greater distortion will be present on other frequencies bands and this may cause the secondary tracing lines to appear out of alignment with the main tracing line.
Ridge Tool Company Elyria, Ohio U.S.A | www.seektech.com | 21 |