RD4000 Locating System User Manual
Page 28
a)
With the antenna at right angles to the line, make traverses across the line. Define the point of maximum
response.
b)
Without moving the receiver, turn it round as if it is on a pivot. Stop at the point of maximum response.
c)
Hold the receiver vertical with the antenna just above the ground and move the receiver from side to side
across the line. Stop at the point of maximum response.
d)
With the end of the antenna close to the ground, repeat (b).
e)
Repeat (c).
f)
Mark the position and direction of the line.
Repeat the steps of the procedure to increase pinpoint accuracy.
(a)
(b)
(c)
Switch to null response mode and move the receiver to find the null position. If the position of the peak and the
null pinpoints correspond, it can be assumed that the pinpoint is precise. The pinpoint is not precise if the marks
do not correspond, but both marks will show an error to the same side. True line position will be close to peak
position.
The line lies half as far to the other side of the peak position as the distance between the peak and the null positions.
Peak
mode
Null
mode
Null
position
Peak
position
True
position
