Radiodetection SuperCAT 4+ User Manual page 8

Propel the sonde a further 1m (3-4 feet) along the pipe and pinpoint
and mark. Repeat the procedure along the route at similar intervals.
Note, while tracking the sonde altering the locator's sensitivity is not
required unless the depth of the pipe, or the distance between locator
and sonde changes.
Measuring sonde depth
Pinpoint the sonde as previously described. Then rest the locator on
the ground with the blade's orientation parallel to the orientation of the
sonde. Adjust the sensitivity to give a meter reading of 60% to 80%
on the LCD's bargraph.
Note that the depth reading is the distance from the bottom of the
locator blade to the center of the sonde and not to the drain or duct
being located.
CAUTION: Ensure Depth readings are taken from peak readings.
Depth readings taken from ghost signal position will be incorrect.
Depth measurement is automatic. Depth reading will be displayed
when the locator is moved slowly across the sonde. The shallowest
depth reading displayed on the LCD is also the correct position
directly above the sonde.
If the signal is too weak or unstable the locator unit will not calculate
depth. In this case use a more powerful sonde or use the Pinpoint
procedure described below.
Pinpoint Procedure.
1. Move the locator ahead of the sonde.
a. Ensure the blade's orientation is parallel with the sonde's
orientation
14
b. Increase the sensitivity slightly to find the ghost signal.
Note that between the main peak and ghost there is a Null
or minimum.
2. Mark the Null or minimum position for reference.
3. Now move behind the sonde and repeat step 1.
4. Find the Null between the ghost and main peak. See points A and
B on the diagram.
5. The higher the sensitivity of the locator the sharper the Null's
appear.
6. Measure the distance between points A and B and multiply by 0.7
to give an approximate depth measurement.
Warnings
Signal Overload
If the locator is used in areas where very large power signals are
present, the signal bargraph will flash. In this condition the sensitivity
control and depth function will not operate and you are advised to try
lifting the locator to bring it out of the overloaded condition or use in a
different location.
Deactivating
If required the StrikeAlert warnings can be temporarily disabled by
pressing and holding the frequency selection button for the duration
of the battery test bleep at switch on.
Live Plug Connector
Do not use the supplied Direct Connect
leads to connect to live cables. Use the
Radiodetection Live Plug Connector or Live
Cable Connector. Failure to do so may result
in injury or equipment damage.
Connection to live power cables
should only be undertaken by
qualified personnel.
The optional Live Plug Connector applies the transmitter signal to a
live domestic power socket and via the domestic wiring system on the
service cable and the supply cable in the street. The signal should be
detectable on the supply system to a few hundred meters each side of
the point of application.
15