3M 2273M Benutzerhandbuch

 28 

78-8130-6150-0 Rev G

A. Directional Peak (Dir Pk)

Locate/OK [5] + Cable/Pipe [SK] + Mode [SK] + Dir Pk [SK Toggle]

In Dir Pk mode, four peak antennas are used to analyze the magnetic field pattern. The 

Bar Graph [1l] indicates Signal Strength [10] and the directional arrows sense the edges 

of the magnetic field. The left/right arrows will indicate the direction to the nearest cable 

that is in-line with the receiver handle.
As the antenna crosses the cable or pipe, the receiver speaker volume increases to a 

maximum, the Bar Graph [1l] fills from both sides toward the middle, and the numeric 

Signal Strength [10] increases. As the antenna moves off the target path, the speaker 

volume decreases and the Bar Graph [1l] opens. Use the Bar Graph [1l] and the numeric 

Signal Strength [10] value to locate the exact target path.

Left of Target Path

Directly Over Target Path

Right of Target Path

Once the target path has been located, the arrows at the top of the display will indicate 

the location of the target path in relationship to the receiver.
Note: When field distortion (due to congestion) is affecting the receiver the left/right 

B. Directional Null (DirNull)

Locate/OK [5] + Cable/Pipe [SK] + Mode [SK] + DirNull [SK Toggle]

In DirNull mode, as the operator approaches the cable or pipe, the numerical Signal 

Strength [10] will increase then fall sharply as the receiver crosses the target cable 

or pipe. The Bar Graph [1l] fills from both sides toward the middle and the receiver 

speaker volume decreases. As the antenna moves off the target path, the Bar Graph [1l] 

opens, the Signal Strength [10] increases, and the speaker volume increases. Gain adjust 

is automatic in DirNull mode.
The center of the DirNull display provides a ‘compass view' of the target path. An arrow 

will point toward the location of the cable/pipe in 45-degree steps. A solid line will 

appear over the cable/pipe, indicating its orientation to the receiver handle.