RIDGID 1822-I Operator's Manual download pdf (Page 28)

Ridge Tool Company

Advantages of the Omnidirectional

Antenna

Unlike the coils used in many locator devices, the Omni-

directional antenna detects fields on three separate axes,

and can combine these signals into a “picture” of the ap-

parent strength, orientation and direction of a field. Omni-

directional antennas offer definite advantages:

The Mapping Display

The mapping display enabled by the Omnidirectional an-

tennas provides a graphic view of a signal’s character-

istics and a bird’s eye view of the signal underground. It

is used as a guide for tracing underground lines and can

be used to better pinpoint Sondes. It can also be used to

provide more information for complex locates.

Figure 48 – Mapping Display

The use of lines (representing the signals sensed by

upper and lower antennas) gives the operator a graphic

way to see where they are, and where the target utility or

Sonde is located. At the same time the display pro-

vides all the information needed to understand what is

happening with the field being located – its Signal

Strength, continuous distance, Signal Angle and prox-

imity to the target. The information available at one mo-

ment on the NaviTrack II would take multiple sample

readings with some conventional locators. A distorted or

compound field is easier to interpret when all the infor-

mation is in a single display as it is with the NaviTrack II.

Orientation to the Signal

Because of the multiple signals being processed by each

Omnidirectional antenna, the target’s signal always gets

stronger as the receiver gets closer to the target. How the

unit is held does not affect Signal Strength. The user

can approach from any direction and does not need to

know the orientation or direction of the pipe or wire.

Locating Sondes

Used with a Sonde, the NaviTrack II eliminates Nulls

and "Ghost Peaks”. A conventional locator signal often

sees a signal increase followed by a null (better de-

scribed as no signal registering on the antenna) and then

a peak. This can confuse the operator who may interpret

a smaller peak as the target.

Figure 49 – The signal from a Sonde as “seen” by a con-

ventional locator

The main peak is in the center, and two false peaks are

outside the two nulls.

The NaviTrack II uses just one peak to draw the user to

the target. Finding a Sonde using Signal Strength is a

very direct process.

Figure 50 – Sonde signal as “seen” by the NaviTrack II

The only way to go is “up” toward the maximum signal.

NaviTrack

False Peaks

Null

Peaks

Peak

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RIDGID 1822-I Operator's Manual Page 28

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