Locating cables and pipes: Part 2Follow
The RD7000+ system supports up to 3 antenna modes, exclusively dedicated to locating cable and pipes, and to suit your particular application or the local environment. These are:
- Peak mode
- Null mode (PLM and TLM models only)
- Peak/Null mode
Peak mode provides the most sensitive and accurate mode for location and depth measurement. It provides a sharp Peak response with a corresponding small decrease in sensitivity. Peak mode cannot be disabled using the menu.
In Peak mode the following indicators are displayed by the LCD:
- Signal strength
To select Peak mode:
Press thekey until the Peak mode icon is displayed on the LCD.
Null mode is used to verify a locate signal in environments with limited or no electromagnetic distortion.
In null mode the following indicators are displayed by the LCD:
- Signal strength.
- Right and left arrows.
To select null mode:
1 Press thekey until the null mode icon is displayed on the LCD.
Null mode gives a null response when it is directly over the line. The sharp, null response can be easier to use than the Peak response but is vulnerable to interference and should not be used for locating, except in areas where there is no interference present.
Combined Peak/Null mode
Peak/Null mode gives you the advantages associated with these modes simultaneously.
Use the proportional arrows to place the locator above the NULL point. If the peak response is not at a maximum then this is evidence of a distorted field. If the peak response is at its maximum level where the NULL point is located then there is no or very limited distortion present. At this point, peak mode may be selected to obtain depth and current information.
In Peak/Null mode the following indicators are displayed by the LCD:
- Proportional right and left arrows
- Signal strength
To select Peak/Null mode:
1 Press the key until the Peak/Null mode iconis displayed on the LCD.
- Null mode
This mode is only available for the PLM and TLM models.
1 Press the key until the null mode icon is displayed on the LCD.