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.
AMPROBE ®
1-305-423-7500
R-3000 Locator features
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1 |
On/Off |
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Press and hold to use R-3000 |
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Loudspeaker |
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To use in noisy environments unscrew and hold to ear.
3 Sensitivity control
5
4Function switch
Selects locate mode: Power, Radio, G-3000
5Battery compartment
To replace batteries, open the access cover using a screwdriver or
coin. Use eight LR6 or AA alkaline batteries.
Liquid crystal |
Depth |
display |
Mode/clockface |
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m |
Signal strength
Depth button
G-3000 Transmitter features
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On/Off button |
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Press and hold to reduce |
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speaker volume. |
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2 |
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Direct Connection socket |
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3 |
Loudspeaker |
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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.
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.
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.
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.
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.
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