Amprobe AT-3000 Underground-Wire-Pipe-Locator - Manual

G-3000 Transmitter features
1 On/Off button
Press and hold to reduce
speaker volume.
2 Direct Connection socket
3 Loudspeaker
4 Battery compartment
To replace batteries, open
the access cover using a
screwdriver or coin. Use
four LR20 or D alkaline
batteries.
5 Storage compartment
Holding Connection Cable
and Ground Stake.
Locating with the R-3000 and G-3000
The G-3000 is used to apply a tone to a buried
conductor. This signal can be traced using the
R-3000 locator switched to the G-3000 mode.
Direct connection
Direct connection is the most effective form of signal
application and is suitable for connection to a valve,
meter, junction box or other access point.
WARNING
Connection to a power cable sheath should only
be undertaken by qualified personnel.
Method
Plug the Connection lead into the G-3000 connection
socket and attach the red lead to the target line. If
necessary clean the connection point to ensure a good
electrical contact.
Clip the ground lead to the earth stake which should
be placed in the ground 3 to 4 paces away from, and
at right angles to the target line.
Alternatively the ground lead may be clipped to the rim
of a valve box or manhole cover. Use the spool lead to
extend the earth connection if necessary.
Switch the G-3000 on. A good connection is indicated
by a drop in loudspeaker tone. if there is no tone or it
is a very slow bleep, replace the batteries.
Switch the R-3000 to G-3000 mode and begin to trace
the line from the point of application. Pinpoint using the
same method as described for Power and Radio
modes.
When directly over the
conductor and with the
sensitivity level set for a
narrow response, rotate
the R-3000 on its axis until
the signal minimum is
found. The blade is now in
line with the conductor.
Trace the conductor out of
the area, marking the
position as required with
chalk or paint
Radio mode
For detection of radio signals originating from distant
radio transmitters. These penetrate the ground and are
re-radiated by buried conductors. However, they are not
always present.
After completion of Power mode sweep, repeat the
procedure with Radio mode selected.
WARNING
The R-3000 will detect almost all buried conductors
but there are some which do not radiate any signal
which the R-3000 will not detect.
There are also some live power cables which the R-
3000 is not able to detect in he Power mode.
The R-3000 does not indicate whether a signal is
from a single cable or from several in close
proximity.
Note
The R-3000 will not provide depth information in either
the Power or Radio modes.
Liquid crystal
display
R-3000 Locator features
1 On/Off
Press and hold to use R-3000
2 Loudspeaker
To use in noisy environments
unscrew and hold to ear.
3 Sensitivity control
4 Function switch
Selects locate mode:
Power, Radio, G-3000
5 Battery compartment
To replace batteries, open the
access cover using a screwdriver or
coin. Use eight LR6 or AA alkaline batteries.
AT-3000 User guide
The R-3000 and G-3000 combine to make
the perfect general purpose tools for cable
avoidance. Their rugged construction
ensures long life and reliability whilst the
simple controls promote effective use with
minimal training.
For those who require pinpoint accuracy
and depth information, the AT-3000 add
visual indiction of signal strength together
with a buried utility depth measurement
capability.
5
3
4
1
2
5
2
1
3
4
m
Depth
Mode/clockface
Signal
strength
Depth
button
Operation of Power and Radio modes
Regularly check your R-3000 and G-3000 in all modes,
over a cable which gives a response you are familiar
with.
Power mode
For detection of ‘Power’ signals radiated by loaded
cables. These are often found ‘re-radiated’ by other,
nearby conductors. Select Power using the Function
switch. Press and hold the On/Off switch. Replace
batteries if no initial ‘bleep’ is heard to confirm good
battery condition.
Rotate the Sensitivity Control fully clockwise for
maximum sensitivity but reduce if there is a blanket
signal across the site.
Define the area to be excavated and carry out a grid
pattern sweep.
Sweep holding the R-3000 upright and at your side.
Continue the sweep beyond the perimeter of the area
to be excavated.
AMPROBE
1-305-423-7500
®
The presence of a buried conducting pipe or cable will
be indicated by a tone emitted from the loudspeaker.
Keep the blade of the R-3000 vertical and move slowly
backwards and forwards over the conductor, reducing
the sensitivity for a narrower response. With the R-3000
use the meter deflection to aid pinpointing. Maximum
meter deflection will indicate the position of the
conductor.