Radiodetection rd7000+, Руководство по эксплуатации

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© 2014 Radiodetection Ltd 16
WARNING! Before applying or removing the clamp
around a power cable, ensure that the clamp is connected
to the transmitter at all times.
4.1.3 Selecting Frequencies
It is important to select the correct or appropriate
frequency for your particular application. For more
information see Section 6 or refer to the application note
“ABC & XYZ of Locating Buried Pipes and Cables”,
which is available as a free download from
www.radiodetection.com
To select a frequency on the locator:
1 Press the key to cycle through available
frequencies
2 Alternatively, hold down the key and press the
or keys to cycle up or down the range of
frequencies
If using an active frequency you must also set your
transmitter to output the matching frequency.
To manually select a transmitter output
frequency:
1 Press the key to cycle through available
frequencies
NOTE: Some frequencies require that you connect an
accessory, for example an A-Frame, before the
frequency is available.
4.2 Antenna modes
The 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
4.2.1 Peak 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:

Depth

Current

Signal strength

Compass
To select peak mode:
1 Press the key until the peak mode icon is
displayed on the LCD
4.2.2 Null Mode
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.

Compass.

Right and left arrows.
To select null mode:
1 Press the key 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 (See 4.2.3
Combined Peak/Null mode).
4.2.3 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

Compass

Current

Depth
To select Peak/Null mode:
1 Press the key until the Peak/Null mode icon
is displayed on the LCD

Null mode