RD8000 Operation Manual 25
8.2.3 Applying a transmitter signal
The transmitter signal can be connected, clamped or
induced to the target line in the same way as the signal
for line tracing is applied.
Figure 8.7: Current readings
using transmitter signals
8.2.4 Signal current measurements
Pinpoint the line and conrm the accuracy of the peak
pinpoint with a null pinpoint. Check the receiver is directly
over the line, with the antennae at right angles to it and
vertical.
The receiver will automatically estimate and display depth
on the LCD.
A signal coupled to a nearby line may distort the accuracy
of the measurement. If the accuracy of the reading is
suspect, sweep the area to check if other nearby lines
are radiating the signal. If other signals are causing
interference, it may be necessary to make the current
measurement at another point along the line.
Both antennae are needed to make a current
measurement and receiver accessory antennae such as
a normal clamp or stethoscope cannot be used. Because
current measurement is a function of depth, it is only
available in the locating modes. It is also available with
Current Direction (CD) clamps.
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