Fluke 2042 Инструкция по эксплуатации онлайн [12/28] 4556

Theoretical functional principle

The FLUKE Cable Locator consists of a transmitter and a

receiver.The signal generated by the transmitter consists

of a modulated current. Generating a magnetic field ar-

round a conductor, see figure 1. This electro-magnetic

field surrounding the conductor induces a voltage within

the receiver coils. For both modes, automatic mode and

manual mode, the receiver works with three coils and

does, not depend on a position. A selective and position-

dependant search is performed in selective mode with

only one active coil.

Locator in complete circuits

1st Possibility (one pole application)

Connect the transmitter to only one conductor. In this operational mode, the transmitter is supplied

by the built-in battery. Due to the high-frequency signal generated by the transmitter, only one sin-

gle conductor can be located and traced. The second conductor is the ground. This arrangement

causes a high frequency current to flow through the conductor and to be transmitted to ground, si-

milar to a radio and receiver. As from now on, we will call the above described operation one-pole

application.

2nd Possibility (double-pole application)

Connect the transmitter to the mains.The transmitter is supplied by the mains. In this example, the

modulated current flows through the phase into the transformer and back through neutral.There is

a further possibility for voltage free systems by connecting the transmitter to two line terminals while

short-circuiting the other line ends.Thus a complete circuit is created. Then, the transmitter is sup-

plied by the built-in battery. From now on, we will call this operation double pole application.

The FLUKE Cable Locator can only detect or locate lines, which are connected correctly in ac-

cordance with the physical principle described.

Important Application

For our example, we advise you to take a piece of a plastic-sheathed cable NYM 3 x 1,5 mm

, for

example. Provisionally install 5m of this cable along the wall with nail clips at eye level as surface

mounting. Make sure that the wall is accessible from both sides.Create an artificial interruption at a

distance of 1,5m before the line terminal. The line terminals must be open. Strip the interrrupted

lead at the lead at the start of the light plastic-sheathed cable and connect it via the measuring

leads (supplied with the instrument) with terminal (1) of the transmitter.

Fluke 2042

Users manual