19
4 Sonde Locating
4.3 The Sonde Signal
The Sonde emits a large peak locate signal and two null points (forward or rear points) on
each side of the peak. The deeper the Sonde is underground, the further apart these two
null points will be.
The screen of the Pipeline Locator displays the peak and null points as:
Null Locate Points
As the user approaches the Sonde, from either direction, the locator will pick up the rear or
forward null locate point. The null locate points are identified by a blue double circle .
After the null locate point, an arrow will appear
directing the user toward the sonde
location.
Following the arrow
will lead the user over the peak locate signal where the sonde
icon will appear.
Peak locate signal
4.4 Set the mode and frequency of the Pipeline Locator
Switch on the Pipeline Locator and use the Mode
button to enter Sonde mode.
Make sure that the Sonde
frequency matches
sonde frequency set in the WIRELESS
MONITOR or PIPELINE INSPECTION APP.
Содержание M12 2580-20
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