Checking Sonde Depth - SPX Radiodetection RD7000+ Operation Manual

7.4.6 Checking sonde depth

The RD7000+ locator will automatically display the depth
of a located sonde providing the locator is correctly
oriented and positioned above the sonde. Using the LCD
compass as a guide, rotate the locator until the compass
indicates the sonde is in East/West position.
Calculation method
Pinpoint the sonde. Move the locator in front of the sonde
and still with the antenna in line with it, increase sensitivity
to find the peak of the ghost signal. Move the locator
to behind the sonde ensuring that the locator blade is
always in line with the sonde. Find the null positions A
and B (see Figure 7.8). Measure the distance between
them and multiply by 0.7 to give an approximate depth
measurement.
7.4.7 Types and range of sondes
Standard sonde
The standard sonde combines compact size with
a strong signal and is the standard sonde for most
applications unless a smaller size, greater depth or
rugged construction sonde is required.
Figure 7.9: Standard sonde
Super small sonde
This is a specialized sonde particularly suitable for no-dig
applications. This type of sonde has an interchangeable
battery compartment so that the length of the sonde can
be altered. Shortening the length of the sonde means that
fewer batteries can be accommodated and this will affect
battery life.
Figure 7.10: Super small sondes
Sewer sonde
This sonde incorporates a very strong housing and makes
the sonde suitable for use in municipal sewer systems.
The sonde has a long life for daily use in all conditions.
Figure 7.11: Sewer sonde
Super sonde
A particularly rugged sonde for use in deep sewers.
FlexiTrace
The FlexiTrace is a traceable plastic covered fiberglass rod
incorporating wire conductors and is used for locating small
diameter, non-metallic pipes to a depth of to 3 meters.
The FlexiTrace can be inserted into a pipe or duct as
small as 12mm/0.5 inch internal diameter with a minimum
bend radius of 250mm. Batteries are not required, as the
FlexiTrace is powered by the RD7000+ transmitter.
The FlexiTrace can be used in two modes: Sonde mode or
Line mode. In sonde mode only the tip of the FlexiTrace is
energized whilst in line mode its whole length is energized.
To use as a sonde, connect both transmitter leads to the
FlexiTrace stud terminals. As the FlexiTrace terminals are not
color coded it does not matter to which terminals the leads
are connected. To use the FlexiTrace in line mode, connect
the red transmitter lead to a FlexiTrace terminal and ground
the black lead.
Figure 7.12: FlexiTrace
RD7000+ Operation Manual 27