Tracing Breakers On Systems With Light Dimmers; Signal Clamp (Optional Accessory) - Closed Loop Circuits - Amprobe AT-6010 Mode D'emploi

4. SPECIAL APPLICATIONS

4.11 Tracing Breakers on Systems with Light Dimmers

Light dimmers can produce a significant amount of electrical "noise" that consists of multi-frequency
signals. In some rare situations, the Receiver can misread this noise, often called a "ghost" signal, as a
Transmitter - generated signal. Therefore, the Receiver may provide wrong readings.
When locating breakers or fuses on systems with light dimmers, the dimmer should be off (the
light switch is off). This prevents the Receiver from indicating a wrong breaker/fuse.

4.12 Signal Clamp (optional accessory) - Closed Loop Circuits

Closed loop, De-energized and low impedance circuits
The clamp accessory is used for applications where there is no access to a bare conductor
to connect the test leads. When the clamp is connected to the Transmitter, it enables the
Transmitter to induce a signal to the Energized or De-energized wire through the insulation.
Typical applications of the Signal Clamp include tracing conduits or shields grounded on both
ends. For signal cables and De-energized wires or loads, temporarily ground the circuit on both
ends to perform tracing.
Connecting the Signal Clamp
1. Connect the CT-400 test leads to the terminals of the Transmitter (polarity does not matter).
2. Clamp the CT-400 Signal Clamp around the conductor. To increase the signal strength, wind
a few turns of the conductor wire around the clamp if possible.
Setting up the AT-6010-T Transmitter
1. Press the ON/OFF key to turn on the Transmitter. The red
LED voltage status indicator should be OFF when the clamp
is connected and when working with either Energized or
De-energized systems.
2. Short press ON/OFF button to select the Loop mode
on the Transmitter (LOOP red LED will be ON). The
clamp mode generates a boosted 6 kHz signal in order
to provide superior tracing results. The LED on the
Transmitter should appear as in Figure 4.12b.
Figure 4.12a: Connecting the clamp
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Figure 4.12b: Transmitter indicator
showing signal in Loop mode