User Manual Vesala SG33 X2.0 ENG
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4.12
Using inductive couplers
Inductive coupler accessories may be used to locate buried cables, wires, conductive ducts or
pipes that are inaccessible for both direct connection and for clamp-on transformers. Inductive
couplers have limited range and a zone near the coupler where locating is impossible. Often
locating has to be done in sections. Inductive couplers are ineffective on short objects and near
end points.
Position the inductive coupler on the located object perpendicular (at a 90° angle) to the object.
Connect both inductive coupler wires to SG33 and enable boost mode. Refer to your cable
locator information for use for how to locate cables. Start locating outside the immediate
proximity of the inductive coupler. Mark the path on the ground. When signal strength is too
low, relocate the inductive coupler further on the path.
4.13
Using pulse function
Pulse function modulates SG33 output signal with 4 Hz or 8 Hz. Pulsing makes SG33 signal
easier to distinguish among other 33 kHz signals and noise. Using pulse function lowers battery
consumption and locating range.
If two SG33s are available when locating cable faults, connect one SG33 to each end of the cable
and use a different pulse frequency in both of them. At the fault point both signals should have
approximately the same strength.
