Amprobe AT-3500 Underground-Wire-Pipe-Locator - Manual (Page 9)

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Adjacent lines which are horizontal to each other  Minimum of the reception signal
Lines situated on top of each other vertically  Maximum of the reception signal
direct Coupling (Refer to Fig. 2.)
Connect the red test lead of the T-3500 transmitter with the conductor to be traced 1.
Connect the black test lead of the T-3500 transmitter to ground using the grounding rod. Alternatively the black test lead 2.
may be clipped to the rim of a valve box or manhole cover.
Switch the T-3500 on
3.
Select pulse or continuous signal transmission 4.
Switch the R-3500 Receiver on 5.
Begin to trace the cable from the point of application about 50-FT (15m) away 6.
Move slowly over the cable. Decrease or increase the sensitivity as needed 7.
direct Coupling using the A-3500 Clamp (Refer to Fig. 3.)
Plug the SC-3500 clamp into the T-3500 transmitter connection socket 1.
Place the clamp around the pipe or cable 2.
Switch the T-3500 transmitter on 3.
Set the T-3500 transmitter to pulse or continuous signal transmission 4.
Switch the R-3500 Receiver on 5.
Select transmitter 6.
Begin to trace the cable from the point of application about 15m away 7.
Inductive Coupling (Refer to Fig. 4.)
Position the T-3500 transmitter above the presumed cable 1.
Switch on the T-3500 transmitter 2.
Switch on the R-3500 receiver 3.
Select the appropriate mode. Refer to section: Operation:R-3500 4.
Begin to trace the line from the transmitter at least 15m away. 5.
Make sure that a distance of at least 50-FT (15m) is always maintained between the receiver and transmitter in order to 6.
prevent the coupling of the transmitter’s signal through the air.
Locating Passive Lines (Radio and Power Modes) (Refer to Fig. 5.)
The R-3500 Receiver can locate passive cables that carry radio signals in the frequency range between 15 kHz and 23 kHz as well
as power signals between the range of 50 Hz and 60 Hz without the help of the T-3500 Transmitter.
Turn the R-3500 Receiver on 1.
Select radio mode or power mode. Refer to section 8 OPERATION. 2.
Set the sensitivity to maximum 3.
Sweep the area using a grid pattern as shown below 4.
Adjust the sensitivity to pinpoint the conductor 5.
Rotate the R-3500 to find the maximum response 6.
Locating unknown cables (Refer to Fig. 6.)
Use the T-3500 Transmitter using the inductive mode. 1.
Use the R-3500 Receiver to sweep the area. Keep the receiver 50-FT (15m) apart from the transmitter. 2.
Select the desired mode of operation. 3.
Adjust the sensitivity of the R-3500 as needed 4.
When a conductor is located, pinpoint the strongest signal and mark the location 5.
Repeat steps 1 and 2. Move the transmitter at least 3.3-FT (1m) and 90-degree from the initial position. 6.
Repeat the process until the right cable is detected. 7.
depth Measurement (Refer to Fig. 7.)
Connect the T-3500 transmitter with the cable or the metallic pipe 1.
Turn the T-3500 transmitter on. Use continuous signal mode for better result 2.
Turn the R-3500 receiver on and move at least 50-FT (15m) away from the transmitter 3.
Rotate the R-3500 receiver until the maximum signal strength is detected 4.
Push control1 5. to take an automatic depth measurement
The measurement will display as follow: 6.
To change the unit of measure, refer to R-3500 mode of operation (section 8). 7.
For non-metallic pipe, use the M-3000 mouse. Refer to R-3500 receiver mode of operation section 9 to set the receiver 8.
accordingly.